According to the current specifications, only the design method of Unilateral Eccentric Simple Column Extended Foundation can be applied, while in the engineering, double-column sharing one foundation is more often the case. Given space between the two columns is much smaller, to design on the basis of Simple Column Extended Foundation method is practical; however, if the space is too much larger, to follow the same method seems inappropriate. Thus, this paper explains how to design Double-column Joint Extended Foundation with Large...
