Adjusting the width of each end of the pad in relation to the load supported can produce a more economic solution.
This is particularly useful where two point loads of different sizes need to be supported and a relatively uniform bearing pressure is required (see Fig. 9.17). It is also useful where adjustments by cantilever action are not possible, for example, where two different column loads on the edge of opposite building lines require support (see Fig. 9.18).
Fig. 9.17 Trapezoidal balanced pad foundation.
Fig. 9.18 Trapezoidal balanced pad foundation.