WINDLOADING REQUIREMENTS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00800R000100160002-9
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 10
• Document Creation Date: December 15, 2016
• Document Release Date: June 22, 2001
• Sequence Number: 2
• Publication Date: March 16, 1979
• Content Type: REQ

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
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