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RE: Wind Uplift on Awning

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Thanks, Bill.

 

T. William (Bill) Allen, S.E.

ALLEN DESIGNS

Consulting Structural Engineers
 
V (949) 248-8588 F(949) 209-2509

-----Original Message-----
From: Cain, William [mailto:bcain(--nospam--at)ebmud.com]
Sent: Monday, May 05, 2008 10:01 AM
To: seaint(--nospam--at)seaint.org
Subject: Wind Uplift on Awning

 

Bill-

Don’t forget the minimum 10 psf loading from ASCE7-05, 6.1.4.

Regards,

Bill Cain, SE

Berkeley CA

 

From: "Bill Allen" <t.w.allen(--nospam--at)cox.net>

To: <seaint(--nospam--at)seaint.org>

Subject: RE: Wind Uplift on Awning

 

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Sooo...am I on the right track?

 

V   = 85 mph

 

Exp = B

 

Kd  = 0.85 (Table 6-4)

 

Kz  = 0.57 (MWFRS, Exp. B, Case 2)

 

qh  = 0.00256(85)2(1.00)

 

    = 8.96 PSF

 

G   = 0.85

 

Cp  = 0.90

 

Cpi = 0.00 (open structure)

 

p   = (8.96)(0.85)(0.90)

 

    = 6.9 PSF

 

Dead Load of Fabric = 5 PSF

 

Net uplift = 6.9 - 0.6(5) = 3.9 PSF