(Classified)

Document Type: 
Collection: 
Document Number (FOIA) /ESDN (CREST): 
CIA-RDP78-05613A000300060002-7
Release Decision: 
RIPPUB
Original Classification: 
K
Document Page Count: 
68
Document Creation Date: 
December 9, 2016
Document Release Date: 
May 4, 1999
Sequence Number: 
2
Case Number: 
Publication Date: 
June 4, 1963
Content Type: 
REPORT
File: 
AttachmentSize
PDF icon CIA-RDP78-05613A000300060002-7.pdf3.99 MB
Body: 
Ap r ved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 C a FO.~ TION PION op A Do;.amcnt so. Rt.iaAF of tUs clay? m ut by CIA has detsrm!nad that [] CIA has no o6",ection to declass Q it com: ni ms is i iewatieu of CIA iset~+ .fi .;sat mist rcma~n clai5i'.;d at TS S Gut.1mityi U. U-2 t tt GC =2''c. s ralhisiw ct V ;'A Alf', Date Q(0 /_0 4- R3riZcJCr Approved For Release 2001/07/30 : CIA-RDP78-05613AOQ03Q0060002-7 Approved For Rele 01/07/30: CIA-RDP78-05613A0003,0 002-7 SPE" CI VI CLT I ON SECTION 1 , EXCAVATION, FILLING I:,NL BAC FILLING 1-01--1-03 SECTION 2 CONCL,TE :-01--2-15 SECTION 3 k: IiSON tY 3-01--3-03 SECTION 4 CIS-tPEN hY 4-01--4-07 SECTION 5 TE.t;;t,AZZC 5-01--5-04 SECTION 6 Cl:LKING 6-01--6-02 SECTION 7 ZGOFING AND WATE MCOFING 7-01--7-05 SECTION 8 PLASTEAING 8-01--8-03 SECTION 9 PAINTING 9-01--9-04 SECTION 10 HAMill"`82 : B?TILLE.1S' 10-01--10-02 SECTION 11 :', ISCELI4NEOUS v:ETAL 11-01--11-03 SECTION 12 GLASS AN1 GLIAZING 12-01--12-02 SECTION 13 FINISHING ,13-01--13-03 SECTION 14 ELECTRICAL GM&q INTERIOR 14-01--14-06 SECTION 15 PLUi5: UNG 15-01--15-04 Approved For Release 2001/07/30 CIA-RDP78-05613A000300060002-7 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 SECTION 1 EXCAVATION, FILLING AND BACKFILLING 1-01 SCOPE: The work covered by this section of the specifica- tions consists in furnishing all plant, labor, equipment, appliances and materials not furnished by the Government, and in performing all opera- tions in connection with the excavation, filling and backfilling complete, in strict accordance with this section of the specifications and the applicable drawings, and subject to the terms and conditions of the contract. 1-02 APPLICABLE STANDARD: The following standard, of the issue listed below but referred to thereafter by basic designation only, forms a part of this specification: American ssociation of State Highway Officials Standard Method: T 99-49 Standard Laboratory Method of Test for the Compaction and Density of Soil 1-03 EXCAVATION: a. General: The site indicated on the drawings shall be cleared of natural obstructions and existing foundations, pavements, utility lines and other items that would interfere with the construc- tion operations. The excavation shall conform to the dimensions and elevations indicated on the drawings, and shall include trenching for utility systems line, and all work incidental thereto. Excavation shall extend a sufficient eistance from walls and footings to allow for plac ing and removal of forms, installation of services and for inspection, except where the concrete for walls and footings is authorized to be deposited directly against excavated surfaces. Underoutting will not be permitted. Suitable escavated material required for fill under slabs shall be separately stockpiled as directed by the contracting Officer. b. Drainage: -Excavation shall be performed in such manner that the area of the site and the area immediately surrounding the site for a distance of 25 feet, including slopes and ditches, will be con- tinually and effectively drained. Excavation for inlet, outlet and diversion ditches, as necessary, shall be performed under this section. c. Shoring, including sheet piling, where required during excavation, shall be nstalled to protect workmen and the banks, adja- cent paving, structures and utilities. Approved For Release 2001/07/30 : CIA-RDP78-05613A00030006000277 Approved for ReI 001/07/30 CIA-RD P78-05613A0003 10002-7 . d. Protection. or removal_ of utility lines: Existing. utility lines that are shown on the drawings of the locations of which are made known to the Contractor prior to excavation and that are to be retained, as well as utility lines constructed during excavation operations, shall be protected from damage during excavation and backfilling and, if damaged, shall be repaired by the Contractor at his expense.. Any existing utility lines that are to be retained and are not shown on the drawings or the locations of which are not known to the Contractor in sufficient times to avoid damage, if inadvertently damaged during excavation, shall be repaired by the Contractor, and adjustment in payment will be made in accordance, with the contract. When utility lines that are to be removed are encountered within the area of operations, the Contractor shall notify the Contract- ing Officer in ample time for the necessary measures to be taken to pre- vent interruption of the service. . e. Excess material from excavation, not required for fill or backfill, shall be wasted where directed by the Contracting Officer and shall be graded. No excavated materials will be wasted without authoriza- tion of the Contracting Officer. f, Topsoil shall be removed, to a depth of 4 inches, from the area within lines 25 feet outside foundation walls, and shall be piled as directed by the Contracting Officer. g,. Blasting: The Contracting Officer shall be the judge as to the necessity for the use of explosives. When rock excavation requires blasting, the Contractor shall exercise care not to overshoot, and shall be required to remove, at his own expense, any material outside the autho- rized cross-section which may be shattered or loosened by such blasting. h. Grad in tt Areas required to be graded shall be constructed true to grades ahale sshaped to drain, and shall be maintained free from extraneous accumulations until inspection has been completed and the work has been accepted. 1-04 FILL: Where concrete slabs are to be placed on earth, any loam or organic or other unsuitable material shall be removed. Fill, where required to raise the subgrade for concrete slabs to the elevations indicated on the drawings shall consist of crushed stone, sand, gravel, or other approved granular material,, Fill shall be compacted by a power roller or other approved equipment, and the subgrade brought to a reason- ably true and even plane. Crushed stone, sand, gravel or other approved granular material used for fill shall be placed in layers not more than 12 inches thick. Each layer shall be uniformly spread, moistened, or dried as required, and then compacted to 90 percent of maximum density obtained at the optimum moisture content as determined by the A.S.S.H '?P. Standard Method T99 with the following modifications: 1-02 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Re11001/07130 : CIA-RDP78-05613A0003'0002-7 a. The mold shall be 6 inches in diameter and 7 inches high. A metal spacer disk 5-15/16 inches in diameter and 2-1/2 inches high shall be used as a false bottom in the mold during compaction. b. In lieu of removing all material retained on a No. 4 sieve, all material over 3/4 inch in size shall be removed and replaced with an equal portion of material between O.,l inch (No. 4 sieve) and 3/4 inch in size. c. The weight of the rammer or metal tamper shall be 10 pounds instead of 5.5 pounds, and the tamper shall be dropped from a height of 18 Inches instead of 12 inches. d. The samples shall be compacted in five layers, each approx- imately 1 inch thick and each layer receiving 55 belows with the specified tamper. e. .A separate batch of soil shall be used for each compaction test speciment. No material shall be reused. 1-05 BACKFILLING: After completion of foundation footings, founda- tion walls, piling, and other construction below the elevation of the final grades, and. prior to backfilling, forms shall be removed and the excava- tion shall be cleaned of trash and debris. Backfill shall consist of approved material from excavation, borrow of sand or gravel, and shall be free of trash, lumber or other debris. Backfill shall be placed in horizontal layers not more than 9 inches thick, and shall have a proper moisture content for the required degree of compaction. Each layer shall be compacted by hand or machine tampers or by other suitable equipment to a density approximating that of the adjacent undistrubed soil. Back- fill under concrete floor slabs shall be compacted to the density spe- cified hereinbefore for fill. Backfill shall be grought to a sutiable elevation abofe grade to provide for anticipated settlement and shrinkage thereof. Backfill shall not be placed against foundation walls prior to 7 days after completion of wall and then only after approval by the Contracting Officer. Backfill shall be brought up evenly on each side of the wall as far as practicable. Heavy equipment for spreading and compact- ing backfill shall not be operated closer to the wall than a distance equal to the height if the backfill above the top of footing. 1-03: Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele 2p01/07/30 : CIA-RDP78-05613A0003(7MW002-7 2-01 SCOPE: Furnish,-all plant, labor, equipment, appliances and materials, and in pefform all operations in connection with the installation of concrete work, complete, in strict accordance with this section of the specifications and the applicable drawings, and subject to the terms and conditions of the contract. 2-02 GENERAL: Full cooperation shall be given other trades to install embedded items. Suitable templates or instructions, or both, will be provided for setting items not placed in the forms. Embedded items shall have been inspected, and tests for concrete and other materials or mechanical opera- tions shall have been completed and approved before concrete is placed. 2-03 MATERIALS: a. ruality requirements for materials listed herein are based on U.S. Federal Specifications. However, the use of products of reputable manufacturers is intended where equivalent to the materials specl- fled, subject to the approval of the Contracting Engineer. b. Ag re ate: Both coarse and fine aggregate, except for gradation, limit of absorption, and sources of materials, shall conform to the requirements of Federal Specification SS-A-28lb. Limit of absorp- tion shall not exceed 5 percent. The maximum size of coarse aggregate shall be not larger than one-fifth of the thickness of the member nor larger than three-fourths of the minimum clear spacing between reinforc- ing bars. (1) General: Coarse and fine aggregate shall consist of crushed river gravel and screenings, or other approved granular materials of similar characteristics, and shall be composed of hard, tough, durable and uncoated particles. The equipment and plant used. in the production of coarse and fine aggregate shall be designed for the aggregate conforming with the requirements of these specifications. Dust shall be removed by adequate washing. The particle shape of the smallest size of crushed coarse and fine aggregate shall be generally rounded or cubical, and the tolerance of flat and elongated particles in all sizes of the coarse and fine aggregate shall be governed by the inherent, placeability requirements of the structure in which the mixture is to be placed. Rock which breaks down into thin, flat, elongated particles, regardless of the type of processing equipment used, will not be approved for use in the production of coarse and fine aggregate. A thin, n flat and elongated particle is defined as a particle having a maximum dimension greater than five (5) times the minimum dimension. Aggregate shall not be manufactured from rock which is subject to Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele 4001/07/30: CIA-RDP78-05613AO0'03 O02-7 weathering or disintegration when exposed to air or moisture nor from rock containing opaline or other active manerals. (2) Coarse and fine.aggre ate: Coarse (Type I & v) and fine (Type II & III aggregate shall be well graded from fine to coarse and shall be within the grading limits shown in the following table: Table of Grading Limits Screen Sizes Percent by Weight Passing _(Inches) Type I Type II Type III # Type V 2 ... ]00 1-1/2 ... 95-100 1 ... 20- 55 .....:.......................,4. 100 3/4 ... 0- 15 ....: 95-100 1 2 ...? .......................... 3/8 0- ...... No.4 ...................95-100 .................... 0- 15 No.8 ....... .... . 5 ? .65- 90 .....,... 100 ...... 0- No..6 ................... 45- 70 ......95-100 ............ No.30 ...................25- 45 ..40- 70 ... No.50 ...................10- 20 .......25- 40 ......... No.100 .................. 2- 8 ....... 0- 25 .. .......... No-200 ...Q.. 2 .... 0- 4 ....... 0- 5 ?......0- 2 # Type IIt aggregates are for mortar and plaster. d. Anchorage items: Slots and inserts for anchoring masonry and mechanical items to concrete shall be of standard local manufacture, of types required to engaged with the anchors to be pro- vided and installed therein under other sections of these specifications, and shall be subject to approval. 30-pound. e. Asphalt-saturated felt: Federal Specification HH-F-191, f. Cement: Only one brand of cement shall be used for exposed concrete in-any individual structure. Cement reclaimed from cleaning bags or leaking container shall not be used. Cement shall be used in the sequence of receipt of shipment, unless otherwise directed: Portland cement shall conform to Federal Specification SS-C192b, Type I. g. Curing materials: (1) waterproof paper: Federal Specification UU-P-264a. (2) Mats: Commercial quality of type best suited to the Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele4peNE001/07/30 : CIA-RDP78-05613A0003 O02-7 (3) Burlap: Commercial quality. h. Forms: Wood, metal, structural hardboard, or other ; approved material that will not adversely affect the surface of the concrete and that will produce or facilitate obtaining specified sur- face finish of the concrete. (1) Wood- (a) Unexposed concrete surfaces: No. 2 Common (b) Exposed concrete surfaces: Dressed-and-matched boards of uniform thickness, and width not exceeding ~10 inches. (c) Rubbed or smooth surfaces: Plywood or with linings as specified below. (2) Pl- wowoo~~d: Commercial-Standard Luan moisture- resistant, concrete-form plywood, not less than 5-ply and at least 9/16 inch thick. (3) Metal Forms: Approved type that will produce surfaces equal to those specified for wood forms. (4) Hardboard forms: A hard-pressed fiberboard conform- ing to Federal Specification LLL-F-311, especially treated for concreteform use, not less than 1/4-inch thick. (5) Form lining: (a) Plywood: Commercial-Standard Luan, concrete- board having a low degree of water absorptivity, not less than 3/16 inch thick, with one smooth side. i. Form Oil: An approved colorless (not darker than ASTM No.3 in accordance with Method 102.5 of Federal Specification -L-791d) mineral oil, free from kerosene, with a viscosity of not less than 70 not more than 110 seconds (Saybolt Universal) at 100 F., except that when used on hardboard forms the viscosity shall be not less than 250 seconds at 100oF. Flash point shall be not less than. 300?F. (open cup). Viscosity and flash point shall be determined in accordance with methods 304.6 and 1103.5, respectively, of Federal Specification VV-L-791d. J. Form sealer: Federal Specification TT-W--572. k. Form ties: Of approved design, fixed or adjustable in length, free of devices that will leave a hole larger than 7/8 inch in diameter in surfaces of concrete, and when used where discoloration of the concrete would be objectionable, metal one inch from the finished surface, 1. Mesh reinforcement: ASTM Standard A 185-54T. except as specified otherwise hereinafter. When indicated in slabs on fill, mesh shall be of the sizes indicated, and gage shall be Americal steel wire gage. 2-03 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For ReleV@pP4001/07/30 : CIA-RDP78-05613A00030 002-7 m. Reinforcement: (1) Deformed bars: Federal Specification O0_B_71a. Type B, Grade II, structure grade billet steel, except as otherwise noted on the drawings. Deformations shall conform to ASTM. (2) Mill reports: Certified copies of mill reports shall accompany deliverjes of reinforcing steel, except mesh rein- forcement. n. Water shall be clean, fresh and free from injurious amounts of mineral nd organic substances. o. Cinders shall be clean and well-burned anthracite cinders, containing not less than 90 clinkers. P, Air-entraining agent: Shall be best local product, either Vinsol or other approved equal brands. q. white Cement: Shall be conformed to JIS-R-5210. 2-04 SAMPLES AND TESTING: a. General: Testing of the aggregate, reinforcement, cement and end items shall be the responsibility of the Owner. Samples of concrete for strength tests of end items shall be provided and stored by the Contractor when and as directed. b. Cement: Cement shall be tested as prescribed in Federal Specification SS-C-192b, and shall be sampled either at the mill or at the ,site of the work. Tests will be made by or under the supervision of the Contracting Engineer at the expense of the Owner. No cement shall be used until notice has been given by the Contracting Engineer that the test re- sults are satisfactory. Cement which has been stored other than in the bins at the mills, for more than 4 months, after beinp tested, shall be retested before use. Ordinarily, no cement shall be used until it has satisfactorily passed both the 7 and 28-day tests; but in cases of urgency the Contracting Engineer may waive the 28-day tests and permit the use of cement which has satisfactorily passed the chemical, soundness and 7 days tests, provided it is the product of a quarry and mill which have established a reputation of not less than 3 years, standing for the production of high-grade cement. Any cement delivered at the site of the work and later found under tests to be unsuitable shall be removed from the work and its vicinity. c. Aggregate: ~ggregate shall be to ted as prescribed in Federal specification 3S-.A-28lb. In addition, fine,. aggregate shall be tested for organic impurities in conformance with ASTM Standard C 40-48. d. Reinforcement: Reinforcing bars shall be tested as prescribed in Federal Specification on,_B-71a. Mesh reinforcement shall be tested as prescribed in ASTM Standard A 185-54T. 2-04 Approved For Release 2001/07/30 : CIA-RDP78-05613A000.300060002-7 Approved For Rel x4001/07/30: CIA-RDP78-05613A0003 O02-7 e. Concrete: (1) Strength tests during the work: The Contractor shall provide for test purposes one set of three cylinders taken from each 250 cubic yards or fraction thereof, or each dayts pour, whichever is less, of each class of concrete placed. Test specimens shall be made and cured in accordance with ASTM Standard C 31-55. Specimens shall be cured under laboratory conditions except that the Contracting Engineer may require curing under field conditions. Cylinders shall be tested in accordance with ASTM Standard C39-49. The test result shall be the average of the strengths of the three cylinders, except that if one specimen in a test shows manifest evidence of improper sampling, molding or testing, the test result shall be the average of the remaining two specimens. If two specimens show such defects, the test shall be discarded. The standard age of tests shall be 28 days, but 7 day tests may be used, with the permission of the Contracting Engineer, provided that the relation between the 7 day and 28 day strengths of the concrete is established by tests for the materials and proportions used. If the average of the strength tests of the laboratory control specimens for. any portion of the work falls below the minimum allowable compressive strength at 28 days required for the class of concrete used in that portion, the Contracting Officer shall have the right to order a change in the proportions of the concrete, or both, for the remaining portions of the work, at the Contractor! s expenses. If the average strength of the specimens sured on the Job falls below the minimum allowable strength, the Contracting Engineer may require changes in the conditions of temperature and moisture necessary to secure the required strength. (2) Tests of hardened concrete in, or removed from, the ,Structure-. Where there is question as to the quality of the concrete in the structure, the Contracting Engineer may required tests in accordance with ASTM Standard C 42-45 or other load tests for that portion of the structure where the questionable concrete has been placed. When required, the load tests shall be made, at the Contractors expense, in accordance with section 202 of the &CI Building Code (ACI 318). In the event that load tests indicate that concrete placed does not conform to the drawings and these specifications, metasures as prescribed by the Contracting Engineer shall be taken to correct the deficiency at no additional cost to the Owner. 2-05 STORAGE: a. General: Storage accommodations shall be subject to approval and shall afford easy access for inspection and identification of each shipment in accordance with test reports. b. Cement: Immediately upon receipt at site of work, cement shall be store in a dry weathertight, properly ventilated structure, with adequate provision for preventrtion of absorption ofaDisture. C. A re ate: Storage piles of aggregate shall afford good drainage, preclude inc usionno.f foreign matter, and preserve the:grada.tion. 2-85 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Relei 001/07/30 : CIA-RDP78-05613A000306Q OO2-7 Sufficient live,or^ ge shall be maintained to permit seggregation of successive shipments, placement of concrete at required rates, and such procedures as heating, inspection and testing. 2-06 'TUIi S a. General: Forms, complete with centering cores and molds, shall be constructed to conform to shape, form, line and grade required, and shall be maintained sufficiently rigid to prevent deformation under load.. studs shall be spaced sufficiently close to prevent deflection of form material and consequent waviness in surfaces of concrete. B. Design: Joints shall be leakproof and shall be arranged vertically or horizontallto conform to the pattern of design. Forms placed on successive units for continuous surfaces shall be fitted to accurate alignment to assure a smooth completed surface free from irre- gulatrities.. In spans where intermediate supports are not possible, the anticipated deflection-in the forms due to weight of fresh concrete shall be accurately figured and taken into account in-the design of the forms, so that finished concrete members will have true surfaces conforming accurately to desired lines, planes and elevations.. If adequate foundation for shores cannot be secured, trussed supports shall be provided.. Temporary openings shall be arranged in wall and column forms and where otherwise required to facilitate cleaning and inspection.. Lumber once used in forms shall have nails withdrawn and surfaces to be exposed to concrete carefully cleaned before reuse. Forms shall be readily removable without hammering or prying against the concrete. c. Form Ties shall be of suitable design and adequate strength for the purpose.. ;;ire ties will not be permitted where discolora- tion of the finished surface would be objectionable.. Bolts and rods which are to be completely withdrawn shall be coated with grease.. d. Joints: Corners of columns, girders and beams and other exposed joints in more than one plane, unless otherwise indicated on the drawings or directed, shall be beveled, rounded or chamfered by moldings placed in the forms.. e. Costing: Forms for exposed surfaces shall be coated with oil before reinforcement is placed. Surplus oil on form surfaces and any oil on reinforceing steel shall be removed. Forms for surfaces not exposed to view or normal weathering may be thoroughly wet with water in lieu of oiling immediately before placing of concrete. Wood forms for con- crete that is to be painted shall be coated with sealer instead of with oil or water. Sealer shall be a water-repellant wood preservative conforming to Federal Specification TT-W-572. Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rel 001/07/30: CIA-RDP78-05613A0003 O02-7 f. Removal: Forms shall be removed only with approval of the Contracting Engineer and in a manner to insure complete safety of the structure after the following conditions have been met. ?,,,There the structure as a whole is supported on shores, the beam and girder sides, columns and similar vertical forms may be removed after 24 hours,. provided concrete is sufficiently hard not to be injured thereby. Supporting forms or shoring shall to support safety their weight and any construction and/or storage load to which they may be subjected but in no case shall they be removed in less than 6 days, nor shall forms used for curing be removed before expiration of curing period except as hereinafter provided under curing. Care shall be taken to avoid spalling the concrete surface. wood forms a shall be removed completely from under steps and similar dead spaces, .thorough temporary opening if necessary. (1) Control tests: Results of suitable control tests will be used as evidence that concrete has attained sufficient strength to permit removal of supporting forms. Cylinders required for control tests shall be provided in addition to those otherwise required by this specifica- tion. Test specimens shall be removed from molds at the end of 24 hours and stored in the structure as near points of sampling as possible, shall receive insofar as practicable the same protection from the elements during curing as is given these portions of the sturcture which they represent, and shall not be removed from the structure for transmittal to the laboratory prior to expiration of three-fourths of the proposed period before removal of forms. In general, supporting forms or shoring shall not be removed until strength of control-test specimens has attained a value of at least 1,500 pounds for columns and 2,000 pounds for all other work. Care must be exercised to assure that the newly unsupported portions of the structure are not subjected to heavy construction or material loading. (2) lamps: Tie-rod clamps to be removed entirely from the wall shall be loosened 24 hours after concrete is placed, and form ties, except for a sufficient number to hold forms in pace, may be removed at that time. Ties wholly withdrawn from walls shall be pulled toward inside face. (3) Filling tie-rod or bolt holes: Holes left by bolts or tie rods shall be filled soled within hours after removal of forms, with cement mortar blended to match adjacent surface, .;Holes passing entirely through walls shall be filled from inside faces, using a stops held at the cutside wall surface to insure complete filling. Holes which do not pass entirely through walls shall be packed full. Excess mortar at faces of filled holes shall be struck off flush. 2-07 REINFORCING STEEL: a. General: Reinforcing steel, fabricated to shapes and dimensions shown, shall be placed where indicated on the drawings or required to carry out the intent of drawings and specifications. Before being placed, 2 - 07 Approved' For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele 2001/07/30 : CIA-RDP78-05613A000 Q002-7 reinforcement shall be thoroughly cleaned of rust, mill scale or coating that would reduce or destory the bond. 'reinforcement reduced in section shall not be .used. Following any substantial delay in the work, previously placed reinforcement left for future bonding shall be inspected and cleaned. Reinforcement shall not be sent or straightened in a manner injurious to the material. Bars with kinds or bends not shown on drawings shall not be placed. The heating of reinforcement for bending or straightening will be permitted only if the entire operation is approved by the Contracting Engineer. In slabs, beams and girders, reinforcement shall not be spliced at points of maximum stress. Laps or splices shall be of adequate length to transmit stresses and, unless otherwise indicated, shall conform to the table in ACI 315-21. Splices in adjacent bars shall be staggered. Splicers in columns, piers and struts shall be lapped sufficiently to transfer the full stress by bond. b. Design and details: Unless otherwise indicated on the drawings, the design of reinforced concrete structaures shall conform to ACI 318-56 and the details of reinforcing steel shall conform to ACI 315-48. Unless otherwise shown or specified, construction shall conform to the following requirements: (1) Concrete covering over steel reinforcement shall be not less than the following thicknesses: Footings and other principal structural members in which concrete is deposited against the ground . . . . . . 3 inches between steel and ground Where concrete surfaces, after removal of forms, are exposed to weather or ground: For bars more than 5/8 inch in diameter . . . 2 inches For bar 5/8 inch or less in diameter l2 inches where surfaces are not directly exposed to weather or ground: For slabs and walls . . . . . . . . . . . 3/4 inch For beams, girders, a.nd tied columns . . . 12 inches All covering . . . . . . . . . . . . Equal to diam. of round bars. Exposed reinforcement bars intended for bonding with future extensions shall be protected from corrosion by concrete or other adequate covering, (2) Stirrup spacer bars: fill stirrups, except ties, shall be held in place by two 3 8-inch spacer bars extending full length of that portion of the beam or girder occupied by stirrups. (3) Shop drawings: Shop details and placing drawings for all reinforcing steel shall be furnished for approval. Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rel 2001/07/30: CIA-RDP78-05613A000"! *W0002-7 c. Supports: With the exception of temperature reinforce- ment which shall be tied to main steel approximately 24 inches in center, reinforcement shall be accurately placed and securely tied at all inter- sections and splices with 18-gage black annealed wire, and shall be securely held in position during the placing of concrete by spacers, chairs or other approved supports. wire-tie ends shall point away from the form. Unless otherwise indicated on the drawings or specified, the number, type and spac- ing of supports shall conform to the ACI Detailing manual (ACI 315-21). 2-08 CLASS OF CONCRETE AND US:^GE: a. Strength recauirements: Concrete required shall be pro- portioned and mixed for the following strength: Class of Minimum allowable compressive concrete Strength at 28 Days 2,500 psi All reinforced concrete 2,000 psi All plain concrete b. Cinder concrete shall be 1 part Portland cement ASTN C-150, Type II, 2 parts sand, and 5 Parts cinders. 2-09 PROPORTIONING OF CONCRETE MIXES: General: Concrete shall be proportioned by weight. (1) Cement: A one-cubic-foot bag of Portland cement will be considered as 94 pounds in weight. In determing the approved mix, Portland cement will be used alond as the cementitious material. 8.33 pounds, (2) Water: One gallon of water will be considered as (3) Aggregate: Fine and coarse aggregate shall be measured by weight in accordance with Federal Specification Ali A-281b. Coarse aggregate shall be used in the greatest amount consistent with required workability. (4) AE Agent (Air-entruning Agent): Shall be mixed with concrete at an amount in various with the-required strength of the concrete and in accordance with the instructions given by the manufacturer. c. Corrective additions to remedy deficiencies in aggregate gradations shall be used only with the written approval of the Contracting Engineer. When such additions are permitted, the material shall be measured separately foreach batch of concrete. 2 - 09 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele!1001/07/30 : CIA-RDP78-05613A0003002-7 d. Control: The design of concrete mixture, to meet strength requirements of the class or classes of concrete specified, shall be the responsibility of the Contractor. No substitutions shall be made in the materials used in the work without the approval of the Contracting Engineer. Average cement content and maximum water per bag of cement shall be as follows: Average Cement Content Maximum Gal of Water Class of Concrete Bage of Cement per Cubic Yard Per Bag of Cement A 2500 pounds per square inch 5.0 6.75 B 2000 pounds per square inch 4.5 7.50 (1) Slump test: Consistency will be determined by the slump test. The slump shall be 3 inches minimum and 3 inches maximum for vibrated concrete. When placing of concrete without vibration is approved, slump shall be from'3 to 6 inches. (2) Mix proportions: Preliminary mix proportions will be furnished the Contracting Engineer by the Contractor before start of operations. Adjustment will be made by the Contracting Engineer, as required, to determine final proportions which will best satisfy job requirements and use of materials. Subsequent adjustment in these final mix proportions shall be made by the Contracting Engineer as required to compensate for variations in the gradation and moisture content of the aggregates. Necessary revisions in water-cement ratio and concrete mix proportions shall be made as directed. (3) Workability: The consistency of the misture will be that required for the specific conditions and methods of placement. The slump shall not exceed that specified above. (4) Strength tests: The Contracting Engineer will determine the strength of the concrete in the completed work during the progress of construction by test specimens mode, cured and tested as specified herein under SAMPLES AND TESTING. Modifications of the design mix, if required, will be made by the Contracting Officer on the basis of the strength of these test specimens. There will be no additional compensation for changing the proportions of the mix to overcome field and aggregate deficiencies or to obtain the specified and characteristics of the concrete. Adjustment in payment will be made for cement more or less that the average bags per cubic yard specified hereinbefore for a given mix. Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele 2001/07/30 : CIA-RDP78-05613A0003DOW002-7 2-10 MATCHING AND. MIXING: a. Pe of plant: The batching plant and mixing equipment shall be as approved by the Contracting Engineer. Either a manual of a semi-automatic plant may be used, subject to the approval of the Contracting i Eng neer. A manual plant is defined as one in which batch weights are set manually and materials are batched manually. A semi-automatic plant is defined as one in which hatching weights are setr:manu .lly, mixes are changed manually, and materials are batched automatically. b. Batching plant- on-site or off-site. (2) Arrangement: Separate bins or compartments shall be provided for fine aggregate, or the different sizes of coarse aggregate, and for bulk cements when used. The compartments shall be of ample size and so constructed that the materials will remain separate under all working conditions. Aggregates may be weighed cumulatively in one weigh batcher on one seals in a manual plant and in a semi-automatic plant may be weighed cumulatively in one weigh batcher on one scale or in separate weigh batchers with individual scales. In a semi-automatic plant, bulk cement shall be weighed on a separate scale in a separate weigh batcher. In a manual plant bulk cement shall be weighed in a separate hopper which may be attached to a separate scale for individual weighing or may be attached to the aggregate hopper for cumulative weighing, provided there are separate beams or dials for cement and aggregates. If cement is weighed on the same scale as the aggregates the cement shall be weighed first and an interlock shall be provided to insure that all hoppers are empty and that the scale is in balance before the weighing of the cement begun. Water may be measured by weight or by volume. In a semi-automatic plant, the batching controls shall be so interlocked that a new batching cycle cannot be, started until all batchers are completely empty. The plant shall be so arranged as to facilitate the inspection of all operations at all times. Suitable facilities shall be provided for obtaining representative samples of concrete for uniformity tests. Delivery of materials from the batching equipment shall be within the following limits of accuracy: Cement . . . . . . . . . . 1 percent Water .......... 1 Percent Aggregate . . . . . . . 2 percent (3) Water batcher: Equipment for batching water shall be provided at the hatching plant or included with the mixer, as required for the type or plant used. A suitable water-measuring device shall be provided which will be capable of measuring the mixing water within the specified requirements for each batch. The machanism for delivering water to the mixers shall be such that leakage will not occur zi?J n a 2 - 11 (1) Location: The batching plant may be located Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Releg#2001/07/30 : CIA-RDP78-05613A000002-7 when the valves are closed. The filling and discharge valves for the water batcher shall be so interlocked that the discharge valve cannot be opened before the filling valve is fully closed. (4) Moisture control: A semi-automatic plant shall be capable of ready adjustment for the varying moisture contents of the aggregates and to change the weights of the materials being batched. (5) Scales: Adequate facilities shall be provided for the accurate measurement and control of each of the materials entering each batch of concrete. The Contractor shall provide standard test weights and any other auxiliary equipment required for the operation of each scale or other measuring device. Periodic tests shall be made in the presence of a Contracting Engineer in such manner and at such intervals as may be directed. c. Concrete mixers may be stationary mixers, or paving mixers of approved design. The mixers shall have a rated capacity of a least 14 cubic feet of mixed concrete and shall not be charged in excess of the capacity recommended by the Manufacturer. Mixers shall be capable of combining the materials into a uniform mixture and of discharging this mixture without segregation. Stationary and paving mixers shall be provided with an acceptable device to lock the discharge mechanism until the regiired mixing time has elapsed. The mixers or mixing plant shall include a device for automatically counting the total number of batches of concrete mixed. The mixers shall be operated at the drum speed designated by the manufacturer on the name plate. The mixing periods specified herein are predicated on proper control of the speed of rotation of the mixer drum, and an proper introduction of the materials into the mixer. The mixing time will be increased when such increase is necessary to secure the required uniformaty and consistency of the concrete, or when test samples of concrete taken from the front, center and back of the mixer show a difference of more than 10 percent in sand-cement or water-cement ratio. Excessive over-mixing requiring a additions of water will not be permitted. The mixers shall be maintained in satisfactory operating condition, and mixer drums shall be kept free of hardened concrete. Mixer blades shall be replaced when worn down more than 10 percent of their depth. Should any mixer at any time produce unsatisf ~.ctory results, its use shall be promptly discontinued until it is repaired. (1) Stationary mixers: The mixing time for each batch, after all solid materials are in the mixer drum and provided that all of the mixing water is introduced before one-fourth of the mixing time has elapsed, shall be not less than 1 minute for mixers h?,ving a capacity of 1 cubic yard; for mixers of larger capacities, the minimum mixing time shall be increased 15 seconds for each addition 1-1/2 cubic yard or fraction thereof of additional concrete mixed. when a stationary mixer is used for partial mixing of the concrete (shrink-mixed) the mixing time in the stationary mixer may be reduced to the minimum necessary to intermingle Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele%#d2001/07/30 : CIA-RDP78-05613A0003W#W002-7 the ingredients (about 30 seconds). 2-11 PRA PAR,ATION FOR PLACING: Water shall be removed before concrete is deposited. Any flow of water shall be diverted through proper side drains and shall be removed without washing over freshly deposited concrete. Hardened concrete, debris and foreign materials shall be removed from interior of forms and from inner surfaces of mixing and conveying equipment. Reinforcement shall be secured in position, inspected and approved before curing of concrete. Runways shall be provided for wheeled concrete-handling equipment; such equipment shall not be wheeled over reinforcement nor shall runways be supported on reinforcement. 2-12 PLACING CONCRETE: a. General: No concrete shall be placed in final position except in the presence of a Contracting Engineer. The use of bait conveyors, chutes or similar equipment will not be permitted without written approval. Concrete shall be handled from mixer or transport vehicle to place of final deposit in a continuous manner, as rapidly as practicable, and, without segregation or loss of ingredients until the approved unit of operation is completed. Concrete that has attained its initial set or has contained its mixing water for more than 45 minutes shall not be placed in the work. Placing will not be permitted when, in the opinion of the Contracting Engineer, the sun, heat, wind or limitations of facilities furnished by the contractor prevent proper finishing and curing of the concrete. Forms or reinforcement shall not be splashed with concrete in advance of pouring. Concrete shall be placed in the forms as nearly as practicable in final position. Immediately after placing, concrete shall be compacted by thoroughly agitating in an approved manner. Tapping or other external vibration of forms will not be permitted. Concrete shall not be placed on concrete sufficiently hard to cause formation of seams and planes of weakness within the section. Concrete shall not be allowed to drop freely more than 5 feet in unexposed work nor more than 3 feet in exposed work.. Concrete be receive other construc- tion shall be screeded to the proper level to avoid excessive shimming or grounting. 2-13 COMPhCTION: Concrete shall be compacted by mechanical internal-vibrating equipment supplemented by hand-spading, rodding and tamping as directed. Vibrators shall in no case be used to transport concrete inside forms. Use of form vibrators will not be permitted. Internal vibrators shall maintain a speed of not less than 5,000 impulse per minute when submerged in the concrete. At least one spare vibrator or sufficient parts for repairing vibrators shall be maintained at the site of all times. Duration 2 - 13 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Reld&pW2001/07/30 : CIA-RDP78-05613A000390WO02-7 of vibration shall be limited to time necessary to produce satisfactory consolidation without causing objectionable segregation and shall be at least 20 seconds per square foot of exposed surface. The vibrator shall not be inserted into lower courses that have begun to set. Where absorptive form lining is used, the vibrator shall not be placed between the forms and the outer row of reinforcement, and in no case shall the vibrator be allowed to tough the absorptive form lining. Vibrators shall be applied at uniformly spaced points not farther apart than the visible effectiveness of the mashine. 2-14 BONDING AND GROUTING: Before depositing new concrete on or against concrete that has set, existing surfaces shall be thoroughly roughened and cleaned of laitance, foreign matter and loose particles. Forms shall be retightened and existing surfaces slushed with a grout coat of neat cement. New concrete shall be placed before the grout has attained initial set. Horizontal construction joints shall be given a brush coat of grout consisting of cement and fire aggregate in the same pr o- portion, a s concrete to be placed, followed by approximately 3 inches of concrete of regular mix except that the proportion of coarse aggregate shall be reduced 50 percent. Grout for setting column bases, wall plates and other metal items shall be composed of equal parts of sand and Portland cement, with water sufficient to produce required consistency. 2-15 FINISHES OF CONCRETE a. General: Immediately after removal of the forms all fins and loose material shall be removed; honeycomb, aggregate pockets, voids and holes over 1/2 inch in diameter shall be cut out to solid concrete, thoroughly wetted, brush-coated with neat cement grout, and filled with cement mortar composed of 1 part cement to 2 parts fine aggregate. Mortar shall. be placed in layers as required, with each layer being thoroughly compacted in places. The final layer shall be finished flush and in the same plane as adjacemt surfaces. Patch work shall be damp cured for 72 hours. Exposed patch work shall be rebbed or otherwise treated to match adjacent surfaces. b. Smooth finish shall, in addition to the above, be given to all concrete surfaces throughout the interior and exterior of the structure, which are exposed to view in finished work or are to be pointed. Smooth finish shall consist in thoroughly wettings and then brush-coating the surfaces with cement grout composed of 1 part cement to 2 parts fine aggregate (by volume) mixed with water to the consistency of thick paint. Grout shall be cork or wood floated to fill all pits, air bubbles, and surface holes. Excess grout shall be scraped off with a trowel and the surface rubbed with burlap to remove any visible grout film. 2-14 11 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Relegy402001/07/30 : CIA-RDP78-05613A0003 002-7 In hot, dry weather, the grout shall be kept damp by means of fog spray during the setting period. The finish for any area shall be completed in the same day and the limits of a finished area shall be made at natural breaks in the finished surface.. C. Slabs receiving terrazzo finish: The slabs shall be finished to tamping the concrete with special tools, then screeding with straight edges and floating to present a reasonably true and uniform surface, at an elevation sufficiently below the finished surface elevation, as indicated on the drawings, so that when the terrazzo is poured, the finished surface of the terrazzo will be at the elevation indicated on the drawings. The slabe shall be wood troweled finished to provide adequate bonding surface. 2-16 CURING: a. General: Curing shall be accomplished by preventing loss of moisture, repid temperature change and mechanical injury or injury from rain or flowing water for a period of 7 days when normal Portland cement has been used, or 3 day when high-early-strength portland cement has been used. Curing shall be started as soon after placing and finishing as free water has disappeared from the surface of the concrete. Curing of formed undersurfaces shall be accomplished by moist curing with forms in place for the full curing period, or, if forms are removed prior to the end of the curing period, by other means Approved by the Contracting Engineer. b. Moist curing: Unformed surfaces shall be covered with burlap, cotton or other approved fabric mats, or with sand, and shall be kept continually wet. Forms shall be kept continually wet and if removed before the end of the curing period, curing shall be continued as on unformed surfaces. Using suitable materials. Burlap shall be used only on surfaces which will be unexposed in the finished work and shall be in two layers. 2 - 15 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rel 1+'2001/07/30: CIA-RDP78-05613A000 0002-7 SECTION 3 3-01 scOPE: The work covered by this section of the specifications consists in furnishing all plant, labor, equipment, appliances and materials and in performing all operations in connection with the installation of masonry, complete, in strict accordance with this section of the specifications and the applicable drawings, and subject to the terms and conditions of the contract. 3-02 MATEE,IALS: a. General: quality requirements for materials listed herein are based on U.S. Federal Specifications. However, the use of products of reputable ' manufacturers is intended where 25X1A equivalent to the materials specified, subject to the approval of the Contracting Engineer. b. Anchors and ties: Heavily galvanized metal of standard types, subject to approval by the Contracting Engineer; furnish and install as required. C. Lime: Federal Specification SS-L-351, type M or F, SS-L-351, type C, pulverized with the further requirement that the total free (unhydrated) calcium oxide (CaO) end magnesium oxide (MgO) in the hydrated produce shall not exceed 8 percent by weight, calcu- lated on the "as received" basis. d. Reinforcement: (1) Horizontal reinforcement shall be of electrically welded steel wire not less than No. 8 gage of design shown on drawings. (2) Vertical reinforcing shall be deformed bars as specified under Section 2, CONCRETE. e. Sand: ASTM Specification C 144-44 f. Water: Clean and free from injurious amounts of oil,. acids, soluble salts, and organic impurities. Type I. g. Cement: (1) Portland cement: Federal Specification SS-C-192, 3-01 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rel 2001/07/30: CIA-RDP78-05613A000 0002-7 h,. Common clay brick: All clay brick shall be best quality, well burned local common red brick, riot less than 211 x 9" x.411., No under- sized brick, broken brick, brick with spawls or fissures will be allowed. All brick rejected by the Contracting Officer shall b-~ promptly removed from the site. 3-03 SAMPLES: Before delivery of any material to the site, submit the following samples to Contracting Officer for approval: Common clay brick . . . . . . . . . . 12 units 3-04 HANDLING AND STORAGE: a. All clay brick shall be handles in such manner as to prevent undue chipping and brekae. Storage piles, stacks or bins shall be so located as to avoid being disturbed or shall be barricaded to protect the materials from damage by construction operation. b. Cement lime and any admixture materials, immediately upon delivery to the site, shall be stored in weatherproof sheds, or upon platforms raised free of the ground and effectively protected by tarpaulin covers from exposure to the.weather until used. No cementi- tious or other material that has become caked and hardened from absorption of moisture will be permitted in the work. Bagged cement stored for more than 2 months shall be approved by the Contracting Officer before using, 3-05 PREPAPATION AND STORAGE OF LIME PUTTY: Lime putty shall be made from hydrated lime, or pulverized quick-lime mixed with water to form a stiff, plastic putty. Putty made of hydrated lime, must be stored for more than 24 hours before use in the mortar mix, and precautions taken to protect it from excessive evaporation. Putty made from quicklime shall be passed through a No. 10 sieve and stored for 72 hours prior to use. Store in a manner to prevent undue loss of moisture of heat during slaking period, 3-06 MORTAR MIX NG AND PROPORTIONING: a. General: Use approved type batch mechanical mixer, except that when approved by Contracting Engineer, mortar may be mixed by hand. 1-Mixing time shall be not less than 5 minutes, approximately 2 minutes of which shall be for the mixing of dry materials. Hand- mixing shall be done in a tight mortar-mixing box. 3 - 02 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele 2001/07/30: CIA-RDP78-05613A0003D ~,j(,pO2-7 b. Proportioning: Mortar shall be within the following limit: Proportioned by volume 1ortar Hydrated Lime or A^gregate. Strength Portland Lime Putty _ (Damp qnd Loose) psi) Cement Minimum Maximum Minimum Maximum 1,500 1 1/3 1/2 3-1/4 The cement content specified is the minimum. Where the fine aggregate which is locally available or readily obtainable does not produce the specified compressive strength but is in rill other respects satis- factory, the fine aggregate content shall be decreased to the extent required to obtain that strength with related density, bonding value and other properties. C. Measurement: The method of measuring materials for mortar shall be such that the specified proportion of the materials can be controlled and accurately maintained. The weights per cubic foot of the materials shall be considered as follows: Material weight per Cubit Foot (pound) Portland cement . . . . . . . . 94 Hydrated lime . . . . 40 Quicklime putty . . . . . . . . 80 (minimum) Hydrated lime putty . . . . . . 80 Fine aggregate (dry) . . . . . . 80 Fine aggregate (damp) . . . . . . 85 3-07 TR?,CTION: a. General: Shall be wetted and allowed to drain and then laid in cement mortar in British bond. All brick shall be laid in full mortar beds with vertical joints slushed full. b. All brick work shall be laid so as to point to the exterior of the structures in order to provide for a clean and uniform exterior surface. 3 - 03 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 41 Approved For Religpd 2001/07/30: CIA-RDP78-05613A000 0002-7 SECTION 4 4-01 SCOPE: The work covered by this section of the specifications consists in furnishing all plant, labor, equipment, appliances and materials and in performing all operation in connection with the installation of carpentry, complete, in strict accordance with this section of the specifications and the applicable drawings, and subject to the terms and conditions of the contract. 4-02 MATERIALS: a. General: nuality requirements for materials listed herein are based on U.S. Federal Specifications. However, the use of products of reputable ~ manufacturers is intended where equivalent to the materials specified, subject to the approval of the Contracting Officer. b. Lumber shall conform to the requirements of Federal Specifications MM-L-736 ,nd MM-L-751. Any of the ,umber of the species listed below, or lumber of species equivalent of the species specified, may be substituted if possessing characteristics as set forth in the applicable grading rules listed in Federal Specifications MM-L-736 and MM-L-551, and if approved by the Contracting Officer. All lumber must be termite treated. (1) Bucks, frames: yard Lumber of the grades indicated: . . . . . . . . . . lst Grade (2) Interior trim, shelving and miscellaneous finish: Factory clean Lumber of Select Yard Lumber of the grades indicated: (3) . . 1st Grade ? lst Grade (4) Door (plywood and plywood finish): M lst Grade, use same species throughout. Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele4W01/07/30 : CIA-RDP78-05613A0003002-7 c.: Plywood shall conform to Federal specification NN-P-530 with face veneers as hereinafter specified. 3/5 or 1/2-inch plywood shall have not less than 5 piles, 3/4 inch plywood not less than 7 plies and 1 inch plywood not less than 9 piles. d. Bolts and nuts shall conform to the requirements of Federal Specification FF-B577ununless otherwise approved by the Contracting officer. e. Calking compound shall conform to the requirements of Federal Specification TT7C-597, ,GGrrade I, for gun application wherever practicable. f. Clamps, expansion bolts, expansion screws, washers and anchors shall be of steel and iron and of standard type and manufacture, g. Glue shall be case in type and shall conform to the requirements of Fede -Specification MN-A-125. h. Lag screws shall conform to the requirements of Federal Specification FF-B-5 , unless otherwise approved by the Contracting Officer. i. Nails shall conform to the requirements of Federal Specification F-N-lT5 or may be the drive-screw or spiral type of standard manufacture. J. Steel plates and shapes: Items involving steel plates and shapes shall be made of steel conforming to the requirements of Federal Specification or-S-741, of the type, grade and class normally used in commercial practice. k. Steel sheets shall conform to Federal Specification yn-#-636, either hot or cold-rolled, and of the class, condition and finish best suited for the purpose. 1. White lead paste shall conform to the requirements of Federal Specification FF-S- , un ess otherwise approved by the Contracting Officer. M. Acoustical Units shall be of incombustable com position manufactured from compressed cane fiber. Products of a reputable 25X1A ~ manufacturer may be used, subject to the approval of the Contracting Officer. Tile shall be of uniform size and thickness, 1211 x 1/21- and shall be perforated with beveled edges. Exposed surfaces shall be factory finished with white wash. 4 - 02 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Releas? 2001/07/30 : CIA-RDP78-05613A00Q40'0060002-7 n. Nails for acoustical units shall be galvanized or zinc coated after manufacture. Fails shall be of sufficient length to securely hold the units in place when countersunk into the perforations as detailed on the drawings. o. Plastic costed insect metal screens shall be 18 x 18 mesh. Metal screen cloth sha conform to Federal Specification RR-S-111, type II, III to VII, regular wire size, green color. P. Sashseal: _ Sashseal or approved equal. 25X1A 4-03 LVM5ER: a. Grading: Grading of lumber of the various species shall conform to the requirements of Federal Specifications MM-L-746 and MM-L-751, or conform to the grading rules cited in these speci- fications, Specific requirements for each lumber grade shall be on the basis of density, strength, ring count, number and extensiveness of checks, shakes, splits, knots and gun pockets, amount of wane, cross-granularity, decay, stains and other surface imeerfections. The general requirements for lumber grades are here outlined for guidance only, and are not to be construed as being determinant. (1) Structural grade: Lumber of structural sizes and shape, graded with respect to its strength. (2) Yard lumber: Lumber classified into sizes, shapes and qualities required for ordinary construction and general purpose use. finishing qualities. (a) Select: Lumber of good appearance and lst Grade: Suitable for natural finishes - practically clear. (b) Common: Lumber not of finishing quality, but suitable for general utility and construction purposes; 1st Grade: Sound, tight-knotted and water-tight. 2nd Grade: Same general character as No.1, but less restricted in quality. (3) Factory clear lumber, Grade Nos. 1 and 2: Lumber grades with reference to its use fortrim, molding and other cuttings. The upper grades containing a high percentage of best quality cuttings - practically clear in wide sizes. 4-03 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele~ OO1`/07/30 CIA-RDP78-05613A0003d 002-7 b. Size and Pattern: Lumber shall be surfaced four sides and the dressed sizes of yard and structural lumber shall conform to the net sizes shown on the drawings. Lumber shall be worked to such patterns as are indicated on the drawings or specified, c. Moisture control: Boards and structural lumber not over 2 inches in nominal thicIo ess to be incorporated in the structure, except finish material, shall be air-dried. Moisture content will be established by the Contracting Officer. d. Storage: Lumber delivered to the site shall be care- fully piled off the ground in such manner as to insure proper drainage, ventilation and protection from the weather. 4-04 ANCHOR ? : Anchors shall be installed, where specified or shown on the drawings, to anchor carpentry to masonry or concrete. Rough bucks and frames for doors, windows and louvers shall be anchored with straps in masonry and anchor bolts in concrete. Strap shall be 3/16 by 1~1 inches, turned up 2 inches at ends. Bolts shall be 5/8-inch and bent as shown. Anchors shall extend not less than 8 inches into concrete, and 12 inches into concrete blocks. Anchors shall be placed near top and bottom of items and not over 3 feet on centers intermediately. 4-05 MISCELLAMEOUS ITEMS: Contractor shall furnish and install all miscellaneous items of rough and finish carpentry, not specifically mentioned in this section of the specifications, but shown on the drawings or required to complete the work. All items shall be constructed as indicated on the drawings and of the best quality or workmanship as accepted in the trade. 4-06 sA,,mL ES Samples of the following materials shall be delivered to the Contracting Engineer for test and approval before delivery to the site: Calking compound Gl 2 pounds ue il 1 pint each type Na s, bolts, screws and other anchorages flo r 2 of each kind o s Pl d 1 of each type ywoo (each kind) T t l sample, 1 foot rea ed lumber (each kind) A ti 1 piece, 1 foot long cous cal tile 3 unit Acoustical tile nails s pound Plastic coated insect metal screens 1 piece, 1 , yard long 4 - 04 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rel%VwO2001/07/30 : CIA-RDP78-05613A000 0002-7 4-07 TT?FATMT,NNT : Treatment shall conform to the requirements of Federal Specification TT-W-571.. for ""Wood Preservative; Recommended Treating Pra ctice+". 4-08 iprindow and screen window frames: Frames in wall shall be made as detailed from the solid stock and shall have three-jamb anchors on each side. Frames shall be set plumb and square, and secured with anchors as detailed. 4-09 Acoustical Treatment: Acoustical units shall be secured by galvanized nails, one nails at each corner of each 12+1 x 12+1 unit. Nail heads shall be concealed in the perforations, well below the finished surface of the units. Ceiling units shall be laid out in a square pattern symmetrical about the center lines of each room, space or panel. Units shall not of shimed out from ceiling in order to level them at the proper elevation. Any units requiring such adjustment shall be entirely removed. During erection, the joints around electric outlets, pipes and other work extending through the acoustical treatment shall be sealed tight with plastic calking compound. Following completion of the acoustical treatment, joints shall be straight and true to line, and the exposed surface shall be flush and level. All units shall be tightly butted, and corners shall be full and without,worn or broken places. Units shall be neatly jointed to connecting work. The units shall be scribed carefully to the wall at .the intersection of ceiling and wall line of each room perimeter. Following erection, all dirty or discolored surfaces of the acoustical units shall be cleaned and left free from defects. Units which are damaged or improperly applied shell be removed and, replaced as directed by the Contracting Officer. One cost of water-base white paint shall be applied to the surface of all acoustical units after installation is complete. 4-10 GROUND: Dressed wood shall be furnished for securing all wood trim including cabinets and wherever else required. Grounds shall be set rigid, in perfect alignment and shall be trued with a long straightedge.. Grounds shall be 11 inches wide and of a thickness indicated. Spot grounds for metal flashing shall be set 12 inches on centers, unless otherwise indicated on the drawings. All ground shall be treated lumber. 4-11 DOOR BUCKS: Masonry and concrete walls and partitions having wood frames shall have bucks of 121 inch dressed material of width equal to 4-05 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele001/07/30 : CIA-RDP78-05613A00031O02-7 thickness of partition or wall, unless otherwise indicated. Bucks shall be braced, set straight, true and plumb, and secured with anchors specified hereinbefore. 4-12 DOOR FRAMES: Frames shall be as shown on the drawings with planted stops. Frames shall be set plumb and square, and secured with finishing nails. Double-wedge blocking shall be driven back of jambs at nailing points, also at backs of butts and lock strikes. where no bucks are shown wedges shall be tacked lightly to frames, after frames are aligned. 4-13 DOORS a. General b. Flush hollow-core doors shall be as indicated on the standard details. The core shall be constructed of cypress. Stiles shall is. be fitted together with dovetailed joints or by douels and staples, or by iv any other approved suitable fastenings. The entire core shall be assembled with water-resistant glue and dreased to uniform planes and to a thickness of 1 inch less than the specified thickness of the door. All reneers shall be waterproofed first grade Luan plywood and be bonded with water resistant glue applied to all contact surfaces and the whole door shall be placed in a gluing press which shall apply uniform pressure over the entire surface of the door. The completed door shall be sanded smooth on both faces and edges and all comers shall be rounded to 1/32-inch radius. c. Screen doors shall be constructed to size and design shown on the drawings. Joints of stiles and rails shill be properly formed, tightly fitted, dorvelled, blend-mortised and tenoned, and glued, stiles and rails shall be rubbeted on side to receive the screen. The wire screen cloth shall be stretched tant and secured in place. d. Glass in wood doors shall be of the size indicated on the drawings. The glass shall be secured to the doors with solid hardwood moldings. 4-14 INSTALLATION OF DOOR FRAi S: Doors shall be fitted,. hung and trimmed as hereinafter specified and as indicated on the drawings. Sashseal shall be used. wherever it is necessary. Swinging doors shall have 1/16-inch clear- ance at sides and top, and 3/16-inch clearance over thresholds, unless otherwise directed by the contracting Officer. Doors in openings without tresholds shall have 3/0-inch floor clearance. Doors shall be hung and trimmed with hardware conforming, to the requirements of 4 - 06 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele&01001/07/30 :, CIA-RDP78-05613A0003TQ OO2-7 the section on BUILDERS' TARDW,JARE, All locks with standardized cases shall be installed at the same height. Knob locks and knob latches shall have the center of the knob 43 inches above the finished floor. Cylinder dead lock shall have the center of the cylinder at the same height as the center of the cylinder of knob locks, 4-15 HARDWARE: Items of hardware specified in VUILDERS' HARDTrWARD shall be carefully fitted and securely attached. Care shall be exercised not to mar or injure existing work, Upon completion of the work and in the presence of the Contracting Officer, all hardware shall be demonstrated to work freely, all keys shell be fitted into their respective locks, and upon acceptance of the work, all keys shall be tagged and delivered to the Contracting Officer. 4-16 PRIMING : Millwork, except work to receive stain and natural finish, shall be primed as specified in PARTING: GENERAL 4-17 INSTALLATION OF THg SCREEN WINDOW Installation shall include trimming and fitting necessary tp ale the whole, insect tight. 4 - 07, Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele001/07/30 : CIA-RDP78-05613A0003002-7 SECTION 5 5-01 SCOPE: The work covered by this section of the specifications consists in furnishing all plant, labor, equipment, appliances, and materials, and in performing all operations in connection with the installation of terrazzo, complete, in strict accordance with this section of the specifications and the applicable drawings,. and subject to the terms and conditions of the contract.. 5-02 GENERAL: All cutting, drilling, fitting,. and the installation of wood grounds and forms required to install the terrazzo and as may be required to prepare the completed terrazzo to receive the work of other trades shall be performed under this section. Terrazzo not otherwise shown or specified, shall have a minimum thickness of l' inches from finished surface to concrete surface. The finished surface shall show not less than 70 percent aggregate. 5-03 MATERIALS: a. Cement: Cement shall be locally made, only one brand of cement shall Ee used for terrazzo, Cement reclaimed from cleaning bags or leaking container shall not be used, Cement shall conform to Federal Specification SS- C-192b Type 1. b. Cleaning compound: The compound used for all cleaning of terrazzo shall be an approved neutral chemical cleaner free from acide and strong alkalis or other materials that will affect the color or otherwise damage the terrazzo, c. Division strips: Division strips where shown shall be formed of ha and brass and shall be. of the size and type indicated on the drawings. Unless otherwise specified, gages for strips shall be Brown and Sharpe. (1) Standard strips: Standard division strips shall be not less than No.-18 gage. age. 'r ps shall be not less than 3/4 inches in depth, with approved anchoring features for the floor and not less than 1/2-inch in depth for the wainscot 5-01 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Relea 01/07/30: CIA-RDP78-05613A00030dfiW2-7 (2) Base divider strips: Division strips for bases shall conform to the profile of the base, shall be not less than 1/2-inch in depth, and shall be of the same thickness and type as the main division strips. There terrazzo base only is specified, the division strips'shall be not less than 18 gage. d. Edging strips: Edging strips shall be not less than 1/8-inch thick, of the same material as division strips, and shall be provided with a standard form of anchorage having fins of not less than No. 18 Brown and Sharps gage rust-proofed steel. e. Marble chips: Marble chips shall have an abrasive hardness of a degree satisfactory to the Contracting Officer, Size number 1 chips shall pass a 1/4-inch mesh screen and be retained on a 1/8-inch mesh screen. Size number 2 chips shall pass 2 3/8-inch mesh screen and be retained on a 1/4-inch mesh screen, f. Sand: Sand shall be clean, silicons masonry sand passing a 1/4-incscreen., g. Water:_ Water shall be fresh, clean and free from acid, alkali, sewage, and organic matter. 5-04 SAMPLES: Before any material is delivered to the site, the following samples shall be submitted to the Contracting officer for approval. Terrazzo one 12 by 12 inches panel of each type specified. Division strips . . . Two 12 inch lengths of each type. Edging strips . . . Two 12 inch lengths of each type. Cleaning compound . . . Two pint can. 5-05 TERRAZZO MIX: The terrazzo mixes shall be composed by weight as follows: One part cement and two parts of marble chips of the sizes and colors herein specified. 5-06 PREPARATION FOR TERRAZZO: a. General: Clean the floor slab, and free from all adhesive compound. Concrete surface to receive terrazzo shall be of a suitable texture to.bond to the terrazzo finish, as approved by the y Contracting Officer. The surface shall be roughened with a toothed chisel and, prior to laying the terrazzo, shall be cleaned of all dirt, oil, grease and extraneous material. 5-02 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele1001/07/30 : CIA-RDP78-05613A00031002-7 b. Division strips: Terrazzo floors and wainscots shall be divided by met s rip' s. The division strips shall be set immediately after the spreading of the' underbed, the strips being partially embedded therein, securely anchored to the subfloor and grouted solid. All division strips shall be set straight to lines and to the proper level to ensure that the tops of the strips will show uniformly after grinding and smoothing operations are completed. Each joint and intersection shall be fitted. tight. Strips shall be braced to prevent bulging during the placing of the terrazzo. (1) Floors: Unless otherwise shown on the drawings, or specified, the division in field work of large areas shall be 3 feet by 3 feet, and in small areas shall not exceed 2 feet by 2 feet., d. Edging strips; Edging strips shall be placed at doorways between terrazzo and other types of flooring and along the edges of all terrazzo bases adjoining other types of floor finished. The edging strips at doorways shall be, placed in line with the stop face of doors. All edging strips shall be anchored and groated solid in the underbed or to the concrete subfloor and braced to prevent- bulging as specified for division strips. 5-07 PLACING} TEflRAZ20 i a. Floors: be subs1t face shall be swept clean thoroughly moistened, but nowt ~tr'uated, and slushed with a coating of neat cement grout approximately, 1/16-inch in thickness4 The underfed consisting of one part Portland cement to 4 parts bf coarse-screened sand shall be spread and brought to a leVel nc, less than 1/2-inch thick. The dividing strips shall be installed in the green underbed. The terrazzo mix shall be spread, tamped, and rolled into a compact mass not less than 5/5-inch thick. After rolling, additional aggregate mix shall be sprinkled over the surface to fill up all depressions, to take up excess moisture, and to permit the terrazzo to be troweled to a level, dense and even surface, slightly above the finish line of floor. This level shall allow for the surface grinding necessary to expose the specified area of aggregate, and to produce smooth, level floors, free of waves and depressions. b. Bases: All bases shall be of the terrazzo mix and compositions hereinbefore specified, and shall be poured, and tamped into well-braced forms, rodded, and worked so that the aggregate will be well packed against the surface to be exposed in the finished work. The border at doorways shall extend in to the edging strips placed on the stop side of doors as indicated on drawings. c. Seasoning: The completed terrazzo shall be allowed to season for 6days ing which time it shall be kept moist and free of traffic. The curing shall be accomplished by (1) covering with approximately 1 inch thickness of sand; or (2) covering with building paper or mats; or (3) sprinkling with water at not over one hour intervals. 5-03 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For ReI '2001/07/30 : CIA-RDP78-05613A0003l1W002-7 d. Surfacing: Following the curing period, the terrazzo shall be machine-ground to, a true even surface using a No. 24 grit followed by a ' o. 80 grit or finer abrasive stone. After the first grinding, the surface shall be thoroughly grouted with the same cement and color composition as specified for the matrix of the terrazzo mix. The grout shall be ' of the consistency of thick cream, and shall be b.rashed over the surfaces of eliminate all. imprisoned air and thoroughly fill the surface for final grinding. e. Finishing: ; ans than 72 hours after application, the grouting cosh= be removed by grinding. In the latter stages of grinding, the gritstones or other abrasive used in the grinding machine shall be of a grain or fineness that will give the surface a boned finish. 9mall areas, inaccessible portions, and corners which cannot be reached by the grinding machine shall be ground and rubbed by hand. The honed surface of finished terrazzo shall show not less than 70 percent of its area in exposed aggregate, evenly distributed, and shall conform in appearance to the approved samples. 5-08 PROTECTION: The surfaces of the finished work of other trades shall be properly protected from damage and soiling during the process of grinding and washing of the terrazzo. After the finish grinding has been completed and the surface treatment applied, the terrazzo work shall be covor d a ku Pi-occcued with material approved by the Contracting Officer until the completion all work by other trades. 5-09 CIEANING AND COAT.INL+ Prior to the placing of the protective covering, or when in the opinion of the Contracting Officer it would be better to do so, after the work of all other trades has been completed and the protec- tive covering removed; the terrazzo work shall be washed with cleaning compound mixed with warm water and, using a fine abrasive as necessary, remove strains or cement smears,, The terrazzo shall be allowed to dry thoroughly and shall. be given scaling application of preservative material. The sealing preparation shall be applied in accordance with the manufacturer's directions, leaving all terrazzo work in clean condition meeting the approval of the Contracting Officer. 5-10 PRECAST TERRAZZO: Precast terrazzo shall be of the terrazzo mix of 1 part cement and 2 parts aggregate and shall be precasted to the size as specified on the drawings. The terrazzo mix shall be poured and tamped into well braced forms, rodded, and worked so that the aggregate will be well packed against the surface to be exposed in the finished work. Both faces and all edges shall be ground to the satisfaction of the Contracting Engineer.' The outer corners shall be ground to a radius of 1/32-inch. All the seasoning surfacing and finishing shall conform to paragraphs specified in this section. The precast. terrazzo shall be anchored on concrete wall with anchor bolts. The v7ire mesh reinforcement shall be of No.8 gage wire and be installed in the middle of the terrazzo. 5-04 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Relea 01/07/30: CIA-RDP78-05613A0003c n02-7 SECTION 6 6.-01 SCOPE: The work covered by this section of the specifications consists in furnishing all plant, labor, equipment, appliances, and materials, and in performing all operations in connection with the application of calking, complete, subject to the terms and conditions of the contract, and in strict accordance with this section of the specifica- tions and the applicable drawings. 6-02 WORK NOT INCLUDED: The section does not include calking occuring in connection with joints in concrete floors, contacts between members of metal doors and metal frames; and roofing and sheet metal work. 6-03 MA TERIA IS : a. , General: Quality requirements for materials listed herein are based on U.S. Federal Specifications. However, the use of 25X1A products of reputable manufacturers is intended where equiva- lent to the materials specified, subject to the approval of the Contracting Officer. b. Calking Compound: Calking compound shall conform to the requirements of Federal. Specification TT-C-598, grade 1. The color of the calking compound shall match the color of the mortar joints. Delivery of the calking compound to the building site shall be in the manufacturerts original sealed packages. c. Sealer: The sealer for the joint grooves in masonry shall be of quick-drying liquid, and of a type and consistency recommended by the manufacturer of the calking compound. d. Rope Yarn: Rope yarn shall be the raveled strands of all fiber free from oil or other staining element, e. Sashseal: - Sashseal or approved equal. 6-c4 SAMPLES: Before the work of application is started, samples of all materials proposed for use shall be submitted to the Contracting Officer fr approval. 6-01 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Relea 01/07/30 : CIA-RDP78-05613A00030 02-7 6-05 4PPLIC,,TION a. General.- Calking shall. be installed in joints around wood or metal frames built into masonry or concrete, and in any other joints so indicated on the drawings and as specified under other sections of these specifications. Calking compound shall be applied by the gun method using nozzles of proper sizes to fit the several widths of the joints. The type of gun shall be subject to approval by the Contracting Engineer. b. Pre ration: Calking in joints shall be a minimum of 3/4-inch in depth arr. 1 4-inch in width unless otherwise indicated on the drawings Where adequate grooves for calking have not been provided, grooves shall be prepared by cutting and cleaning out the mortar to the minimum depth and by grinding to the minimum width, taking care that adjoining metal work is not reduced in section. All particles of mortar., dust, and other foreign matter shall be brushed out and just prior to calking, the joint grooves shall be coated with an application of sealer. Where a suitable mortar backstop has not been provided, the back of joing grooves shall be packed tightly with rope yarn. C. Calking: The compound shall be driven into the joint grooves with sufficient pressure; to force out all air and to solidly fill the joint grooves. Calking, where exposed, shall be free of wrinkles, and shall be uniformly smooth. Joints in precast sills and other wash surfaces shall be filled slightly convex to obtain a flush joint when dry. Calking around all openings in masonry shall include the entire perimeter of each opening. Upon completion of the calking, any calked joints not enbively filled tall be roughened and filled as specified and the exposed Surface tooled smooth. d. Cleanin : The surfaces of all materials adjoining calked joints shall be cleaned of any smears of compound of other soiling due to the calking applicatio::a, 6-02 Approved For Release 2001/07/30 : CIA-RDP78-05613A000300060002-7 Approved For Rele 001/07/30: CIA-RDP78-05613A0003&6W002-7 SECTION 7 7-01 SCOPE: The work covered by this section of the specifications consists in furnishing all plant, labor,