it is a architecture question
Given: The same three-story steel frame office building encountered in previous lecture and
homework. Design dead load=100 psf. Design floor live load=50(office)+15(partition)=65 psf.
Design roof live load=20 psf. Allowable soil bearing capacity is 3,000 psf. Concrete fc’=4,000 psi.
Reinforcing steel fy=60 ksi. Design the column footing at grid B/2. Hint: Try 12’X12’X24” footing w/
12#8 rebars each way. The column footprint is 12”X12”. Concrete cover from bottom of footing to
center of reinforcing steel is 3”.