\[M_r = rac{W_t imes d}{2}\]
\[P = W_t + W_o + W_a\]
\[q = rac{P}{A}\]
where \(M_r\) is the resisting moment, \(W_t\) is the transformer weight, and \(d\) is the distance from the center of gravity to the foundation edge. transformer foundation design calculation pdf
\[A = rac{P}{q_{all}}\]
For a sample transformer foundation design calculation, refer to the following example: \[M_r = rac{W_t imes d}{2}\] \[P = W_t