Diaphragm actions in a roof
A typical horizontal diaphragm can have an allowable shear value. Let’s take a hypothetical horizontal diaphragm in service under following conditions and examine the allowable shear values. Are there modifications to allowable values when the horizontal panel is...
I work in a market that includes engineers that routinely under-design the buildings they engineer. Specifically, I seen many designs that are based on moment arms for overturning that are shorter than where they must be. I have seen designs that calculate uplift forces for shear walls...
Why do we assume that the roof lateral forces act at top plate level and not at the center of gravity of the roof?
Since the center of gravity is somewhere above the top plate level, it seems logical to assume that this force acts with a moment arm that corresponds to its center of gravity...
