most of these question are from hiner and answers here are wrong go to video for corect answers
the answers of question above are not correct for 1 and 2 2.4 and .... best practice for this hiner 8.45 to 8.60 page 3-55
The maximum unit roof shear at the ASD force level is 117.6 lbs/ft.
1. Convert to ASD Force Level
First, convert the seismic base shear from strength-level (LRFD) to Allowable Stress Design (ASD) using the provided conversion factor of
.
2. Determine Maximum Shear at Boundary
In a symmetric diaphragm, the total lateral force is shared equally between the two shear-resisting lines. The maximum shear (
) at the boundary is half of the total ASD shear.
3. Calculate Unit Roof Shear
The unit roof shear (
) is found by dividing the maximum boundary shear by the length of the diaphragm perpendicular to the force (the depth,
). Since the force is North–South, the depth is the dimension in the East–West direction, which is .
