Hello,
ASCE7 wind provisions have (for low-rise buildings) 3 ways to calculate wind pressures for MWFRS:
Method 1 (if the building meets requirements)
Method 2 for h<60ft
Method 2 for all heights.
Now for a 5:12 sloped roof (Theta=22.6 deg), all three methods give different lateral force...
Imagine a 1-story rectangular home with a garage at the front. This is reinf. masonry with wood trusses. The only lateral resisting elements along the front are the two 24" wide masonry piers at ea. side of the garage door. Now the lateral force coming from the diaphragm is about 8000 lbs at 9...