Layout: Architectural considerations determine that columns are uniformly spaced $36$ ft center$-$tocenter along the longer direction and $24$ ft center$-$to$-$center along the shorter direction, and that the

lateral bracing is at the perimeter in the middle bays in both directions. In each floor,

a$.$ Determine the directions for the joists and girders and provide reasoning. Recall that deck

lengths greater than $30$ft are difficult to handle.

b$.$ What is the orientation of the columns made of W sections?

c$.$ Determine a joist spacing

$$ based on maximum deck spans $[$you have to come back to this after having determined

loadings on the roof and floor slabs in step $2]$