6.2 Rectangular combined footings The column loads are actually distributed over the column width but should always be taken as point loads. This assumption greatly simplifies the shear and moment computations,and the values at the critical locations are the same by either method. It should be self-evident that combined footings are statically determinate for any number of columns. With the column loads known and assuming a rigid footing,the resulting soil pressure q=>P/A.The problem then becomes that of a uniformly loaded continuous 周 beam with all the reactions (the columns)known 调6.2 Rectangular combined footings ▪ The column loads are actually distributed over the column width but should always be taken as point loads. ▪ This assumption greatly simplifies the shear and moment computations, and the values at the critical locations are the same by either method. ▪ It should be self-evident that combined footings are statically determinate for any number of columns. ▪ With the column loads known and assuming a rigid footing, the resulting soil pressure q=∑P/A. The problem then becomes that of a uniformly loaded continuous beam with all the reactions (the columns) known