SECTION 5A VENETIAN BLINDS, METAL SLAT

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-05327A000300040012-6
• Release Decision: RIFPUB
• Original Classification: K
• Document Page Count: 6
• Document Creation Date: December 9, 2016
• Document Release Date: March 22, 2001
• Sequence Number: 12
• Content Type: REGULATION

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SECTION 5A
VENETILS BLINDS, METAL SLAT
5- -Ol SCOPE: The work covered by this section of the specifications
consists of furnishing all plant, labor, equipment, and materials not fur
nished by the Government, and of performing all operations in connection
with the installation of venetian blinds, metal slat, complete, in strict
accordance with. this section of the specifications and ,the applicable draw-
ings, and subject to the terms and conditions of.the contract.
5A-02 APPLIChBLE SFECIFICaTIONS; The following Federal Specifications,
of the issues listed below but referred to thereafter by basic designation
only, form a part of this specification:
QQ M,151a Metals; General Specification for Inspection of
RR-B-446
CCC-T 191a
Blinds, Venetian, Metal Slat ,
Textiles; General Specifications, Test Methods.
5A-03 GENERt-iL-. Venetian blinds shall conform. to Federal Specification
Rid-B.Z,,46, and shall be of the types, class and sizes hereinafter specified.
Venetian blinds shall be installed outside the jamb. Width of venetian
blinds shall be such that the blinds shall extend at least 3 inches from
each side of the window wall opening and the height :shall be such that when
in a full-length open hanging position, the lower edge of bottom rail shall
be at least 3 inches below the top of the window sill. All ,;iindows, except
those in Bath Rooms#,. Storage Room and Service area of 4,--Man Standard BOQ
and those in Kitchens, Utility Rooms and Toilets of Two Bedroom Duplex Houses,
shall be provided with venetian blinds. Venetian blinds shall ~e of app
proved American manufacture only. ,
5A-04 TYPES, CLASS AND SIZES: Venetian blinds shall be .of the fol-
to ring types, class and sizes: .
a. Trype zw ~S,ng a pt~?.' or_1 ift type, Class 2 (Aluminum Slats),
64 inches or less in width, and not more than 35 square feet in area,
b? TAT e Com12ound-, all or eas lz n pe, Class 2 (Aluminum
Slats), over 64 inches to 144~inches in width, and nog, more than 80 square
feet in area,
51.05 S 0LES .dD SHOP DRAhrtIN S: A sample of each type of venetian
blinds proposed for use shall be submitted to Contracting Officer for ap-
proval in accordance with paragraph GG-8 of these specifications, Shop
drawings showing details of mounting, posit ion, hold-do ,n 'brackets and
other pertinent data shall be submitted to the Contracting Officer for
approval in accordance with paragraph SC.-14 of these these specifications.
5Ar-06 DESIGN: Venetian blinds shall be of the free--handing design,
with slats adjustable to various angles. Tilting of all types of blinds
shall be controlled by cords, so equipped as to keep both ends of the tilt
cords within convenient reach, The raising and lo-maring shall be controlled
by cords. The venetian blinds shall be so constructed as to be easily re-
moved from windows and disassembled for maintenance,
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5&-07 M tTERD:LS: All materials used in the construction of the vene-
tian blinds shall be of a grade suitable for the purpose;, and shall be free
from defects which affeot their appearance or which may affect their ser-
viceability.
a. Slats shall be of flexible aluminum having a flexibility to
permit a 180-degree bend around a 2-inch-diameter cylinder without harm or
permanent deformation to the slats, or injury to the finish when released
to its original shape. Bend shall be made on both the convex and concave
sides, but shall not include the cord holes. sifter the bend test, the slats
when placed on a plain surface with the concave side dc;.n, the perpendicular
distance of the supporting surface to any point on either edge of the slat
shall not exceed 1/8 inch, With the slat similarly supported, the maximum
difference in the perpendicular distance to the edge of the slats for any
two points 3 inches apart, along either edge, shall not exceed 1/32 inch.
b. Headbox shall be made of cold-rolled steel not less than
0.024. inch thick and shall be fully enclosed type with an adjustable fea-.
tune. Headbox shall have safety lugs on each of the back panel to inter-
lock on the installation brackets. Headbox shall be electro-galvanized,
bonderized and enameled to match the finish of the slats,
c. Insta lation brackets attached to each end of the headbox
shall be of heavy gage metal substantially constructed and so designed as
to securely hold blind at installAion points without shifting movement
during operation. Brackets shall match headbox in design and finish, and
shall be of the universal type suitable for hanging blinds outside the face
of the jambs. Brackets Shull be designed with.a locking device that peai-
tively secures headbox in installation brackets, yet allows ready removal
when necessary. Brackets shall have centering tabs for width adjustments
and shall be designed to provide positive support for hardware allowing
curtain.e:nd drapery attachments. One center support to securely held blind
shall be provided where blinds are over 64 up to 100 inches, and two center
supports where blinds are over 100 up to 120 inches.
d. Tilting device shall be of the self-adjusting type, allcvving
easy leveling of the cord lengths, and shall provide smooth positive tilt-
ing action without slipping, sticking or binding. It shall respond to the
slightest pull and be capable of changing the position of the slats from
one extreme to the other, It shall securely hold the slats and bottom rail
at desired angle, It shell have a brass worm gear and be securely mounted
on a hardened steel shaft. This worm gear shall be accurately meshed with
a precision cut sector g..ar affording maximum tilt and providing positive
thrust bearing qualities. Cord guides shall keep cords snubbed intc ccrd
wheel giving greater traction, preventing cord from slipping off of wheel,
or scraping sides of the hecdbcx. The cord wheel shall be designed to pro.-
vide necessary traction fcr smooth, positive tilting action without causing
undue wear of the tilt cord. The tilting unit shall be substantially ccns-
tructed thcroughcut and be securely mounted in the head'bc.x. It shall be so
designed that removal is easily acccmplished.
5&-02
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e. iitcmat,ic sto~cr ,lif'tin cord lock shall be provided for
all blinds and shall be deli-ned to hold the blind securely at any height by
simply drawing the i_%ftin ce: rd to the center of the window. The device
shall operate effectively without chafing or cutting the cords. Unless
otherwise specified, the automatic stop or locking device shall be at the
right and of the blind,
f, Bottomm raid. shall be constructer of cclc.rclled steel not
less than 0.024 inch thick, eleetro.galvanized, boncloiized: and enameled to
match headbox and the slats. Bottom rail shall be of sufficient strength
and so constructed as net to sag or twist. It shall be of one--piece steam.:.
lined design. Tape and cord ends shall be concealed in and securely fastened
to bottom rail and shell be easily removable when desired. Design and finish
of tape clamp shall harmonize with bottom rail, Bottom rail shall be-fitted
with matching end caps with provision fcr attachment of hold-down brackets,,
g, Metal eguaizer shall be provided for all blinds to hold
the pull cords together and to insure even raising and lowering of the
blinds,
h, IIcld-iownwb shall be provided to hold the blinds in
Position when in full length open-hanging, position., and to prevent the
blinds from swaying,
5&-.08 CONST'RUCT'IONS
a, Slatss All slats in the opr hanging; position of the blind
at any height and at any angle shall be parallel and evenly spaced, The
slats shall be formed with a curved surface and be rigid 'enough to lend
stability against sagging, bending, or kinking. When the blind is com-
pletely raised to its highest position, it shall be neat and compact.
When the slats are tilted in either of thy: extreme close positions while
the' blind is in the hanging position, practically no light shall show
between the slats and rails and each slat shall overlap the slat immediately
below it by not less than inch. The blind shall be easily detachable and
replaceable as a snit. When in hanging position the blind shall be securely
locked in place,
(1) DiMnsi~ons of Slats Aluminum slats shall be 0.10 mach
plus or minus 0,001 inch thick and 2 inches plus or minus l/8 inch wide,
(2) Cord 21ots and grooves for the -passage of cords in the
slats shall be smc;oth,~ without rough or sharp edges which may rcut or abrade
the cords,
b. Ladder_te qs shall be first quality scud ladder cotton
and shall consist of site straps l~ inches plus or minus 1/16 inch wide and
cross straps or ladders at least 31'8 inch wide.
The cross straps shall be
solid woven with ends interwoven with the inside surface of the side straps.
(1) Attar ment a d 57~_c4n : The end of each side strap of
the ladder straps shall be neatly and securely attached to the headbox and
bottom rail by at least two substantial brassy-head nails., metal clips or
approved equal, Staples will not ire acceptable, Tapes shall be in line with
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all suspens~cn odds and s'_cts from bcth sides cf the blind spacing of taps
shall be uniform and shall not exce4d 28 inches bet-.-:eon centers. The cvzr-
hang shall be not more than 7 inches from enter of end t.?.pes to end cf slats.
(2) Breaking Strengths Side straps of lad_1er tapes, when
tested in dividually, shall have a minimum breaking strength of 250 pcunds.
Cross straps, v.hen tested individually, shall hove a raiminui-,, breaking strength
of 20 pcunds without breaking or tearing 'away frcm the side straps of the lad-
der tapes. Breaking strength test shall be in accordance with Federal Speci-
fie ticn COG-T--191.
(3) Color Fastness and Shrinkage: The side straps and cross
straps of the ladder tapes shall h_.ve good color fastness to light and w:.~-
ter, and shall not shrink more than 7 percent, in the warp when tested in
accordance with the applicable methods described in Federal Specification
CCC-T-191. The color fastness to light shall be by the Fado-O-Meter method.
c. Lifting and tilting cords shall be of sufficient length for
convenient and efficient use, Ends of tilt cords shall have neat wood or
ccimposition pull knobs attached,
(1) Ltt chrrent: Cords shall be attached in a neat and
positive manner, and shall be easily detachable and replaceable. Unless
other.:ise specified, the tilting cords shall be near the end of the left
side of the blind, and the lifting cords shall be near the end of the
right side.
(2) Cor Is shall be filled, uniformly braided cotton, fi.-
nishek2: to winirtize wear, stretch, and abrasion. Cards for type I and type
II blinds shall be not less than size No. 44 having a breaking strength
of not less than 125 pcunds. Cords shall remain uniformly taut in use,
d. Type I! sii le-uu ll or lift pe. blinds shall operate over
substantially constructed and easily revolving brass pulleys.
(1) Bottom rails shall be not less than 3/4 inch in thick-
ness and not less than 1-3/4 inches ncr Here than 2-1/8 inches in width.
(2) Pulleys and Housing: Headbcx shall securely and
efficiently house a sufficient number of pulleys, over which the pull cords
shall operate in such a manner as to prevent binding and unnecessary rubbing
of the cords. Pulleys shall be enclosed and sh?:11 not be visible when the
blind is in the hcnging position.
(3) Cord shall be used for tilting the slats and shall be
hereinbef+-re specified.
Type II ccTmmprund--pull or easy lift type, blinds shall be
e
.
raised and lowered by at least four cords cpurating over a system of sub-
stantially constructed and easily revolving brass pulleys, providing a
lift of one foot of blind for each 2 feet cf travel of the lift.
5 i-04
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(1) Bottom rails shall be not less than 3/4 inch in WWI-
-7
and not less than 1 3F inches nor more than 20/8 inches in width.
(2) Pu1.Le s_anclFrHousing; Headbox shall securely and.0f-
ficiently house a sufficient number of easily revolving pulleys, over which
pull cords shall operate in such a manner as to prevent binding and unneces.";
sary rubbing of the cords, Pulleys shall 1e enclosed and shall not be visible
when the blind is in the hanging position..
5A-09 FINISH &ND COLOR:
a, Alum Lumpslats shall receive a chemical dip to provide a
maximum bond between aluminum and baked enamel finish. Finish shall be
capable of withstanding 350 hours standard salt-spray test with no noticeable
deterioration of pain's or metal. Finish in cream or eggshell color shall
be alkyd resionous base or approved equivalent and shall resist chalking
or deterioration under exposure to strong sunlight.
b., Ladder Tapes: Unless otherwise specified, color of tapes
shall harmonize with that of the slutd,
Iie dbo L _bottom pail and tnstaJ :at ,o MAW shall be fi
c.
nished with high grade enamel on bonderized surfaces to match the color
of the slabs?
d. Cords shall match the color of the slats6
e? Hardwnreo All visible hardware shall be lacquered or enameled
to match the color of the slats.
5.t,-l0 h`O PNNSHIP s
a. Operation , f Farts; 111 component ports shall fit properly
and securely, and it movable or revolving devices or parts shall operate
smoothly and easily and shall be simply and easily adjustable or controlled.
Hardware used for lifting devices, and automatic stops or lifting cord
locks shall fit and operate efficiently with the type and size of cord
provided with each blind.
b. yr~aringurfoces of moving arts. andbearing shall be so
designed as to provide maXI Burn durability.
c. Sw~f,ares vnd L;c-i;2 : All surfaces of the blinds shall be
smoothly finished and all exposed edges shall be rounded. Ends of slats
and rails shall be at right angles and shall be rounded,
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5J--11 WOOD CORNICE; with built-in drapery rod shall be prcvided for all
venetian blinds, Cornice shall be made of B & Better Douglas Fir or approved
equal, beaded, standard size, shall have back return and shall conceal mount-
ing brackets, mechanism and drapery heading. Built-in drapery rod shall be
steel, galvanized and enameled, shall snap into brackets and shall be designed
to carry draperies around and of blinds, Wcdd cornice shall be enameled to
match finish of slats,
5A-06
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