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# Combined footing design

## Combined footing design

(OP)
An exterior 12"×12" column with D = 49.03k, L = 8.53k, and interior 12"×12" column with D = 81.16 k, L = 15.54 k are to be supported on a combined rectangular footing whose outer end cannot protrude beyond the outer face of the exterior column. The distance center to center of columns is 20 ft and the allowable bearing pressure of the soil is 4410 psf. The bottom of the footing is 6 ft below grade, and a surcharge of 100 psf is specified on the surface. Design the footing for f'c= 3000 psi, fy = 50,000 psi.

### RE: Combined footing design

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### RE: Combined footing design

Good one@Luceid!

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