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Re: ASCE 7-95 Wind Loads

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Lew,

Look at Table 4(e) [page 1162] ASCE Transactions, Part II, Vol. 126, 1961 for 
the wind forces on a saw-toothed roof.  Wind coefficients at the valleys are 
-0.6, wind coefficients at the ridges are -1.3 away from gabled end, -2.0 at 
gabled end, wind normal to ridge line.

In order to know what ASCE 7-95 intended, they should have shown a plan and 
elevation for a saw-toothed roof, not for a plan and elevation of the same 
single span module that is shown in figure 6-5B.  See also cryptic note 9 for 
figure 6-5 on page 23 of ASCE 7-95.

A. Roger Turk, P.E.(Structural)
Tucson, Arizona

Lew Midlam wrote:

. > I disagree with Roger.  Some guidance on this question can be gleaned from
. > ASCE 7-95, Figure 6-6, which refers to multi-span gabled roofs.
. > 
. > Note that the valley edges of the 'single-module' are all considered as 
. > zone 2.
. > 
. > Lew Midlam, PE
. >