WINDLOADING REQUIREMENTS

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Document Number (FOIA) /ESDN (CREST): 
CIA-RDP86-00800R000100160002-9
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RIPPUB
Original Classification: 
K
Document Page Count: 
10
Document Creation Date: 
December 15, 2016
Document Release Date: 
June 22, 2001
Sequence Number: 
2
Case Number: 
Publication Date: 
March 16, 1979
Content Type: 
REQ
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PDF icon CIA-RDP86-00800R000100160002-9.pdf1.09 MB
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Approved For Release 2001/08/09 : CIA-RDP86-00800R000100160002-9 16 March 1979 STATINTL Square Radome Structural Engineering Handbook p 19-16 thru 19-17 WINDLOADING REQUIREMENTS 1. The windload from 150 mph wind is computed as follows: psf = .00256V2 V = mph = .00256(150)4 = 57.6 psf 2. The windload on the shed with 2 panels removed and a 40 mph wind. The positive pressure is assumed to be at full load while the negative pressure, due to a "vacuum" on the leeward side is 0.40. psf = .00256V2 (positive factor + negative factor) = .00256(40)4(1.00 + 0.40) = (.00256)(1600)(1.4) = 5.7344 psf 3. A 60 mph wind with 30 psf load from snow or ice psf = (.00256)(V2) + 30 = (.00256)(3600) + 30 = 9.216 + 30 = 39.216 psf 4. The requirement to resist 70 psf with no wind appears to be the worst case for the roof. If this load is ice, the ice would have to be (70)(12) = 15 inches thick (62.4)(.88) If the load is snow, the depth would be (70)(12) = 107.7 inches or about 9 feet deep (62.4)(.125) Approved For Release 2001/08/09 : CIA-RDP86-00800R000100160002-9 Approved For Release 2001/08/09 : CIA-RDP86-00800R00010016000 mill:110115" ? um 1 g 11111 stilki M 11 1 iliV:laPAZ:nT+ IMMOMM 1 1 alit I II I i iiII mmaimmumm mom 111 m mm sail mommommosimmummEm mum mommumumminummim toe II ImmliImmEmommEmrm plop mpmmmpplmmmlmmmlmpmmmmmmmmmmmmmlmm IIIIIIIIIII ii i Ilia gillillillmlla illmillIIIIIIiiimilmilm IIIIIIIIIIIII EN Immo ingiblimonn mar."4?1 mitivd.! A kid MOM" litigaiirgiiiii i IIIIIMI Illeliii 1L alit 6 lidi milSidiiiiii -irrj?r 1 1 p II r.r" VL EMI - - F - Ar vir lid ? r i M.1 1111111111 ililAiniii ll WM ,.. , =MEW MIIMEMMEMS=MME Mill MM. 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