�ݺ�ߣ

The document provides guidelines for constructing raft foundations and beams. It recommends making the thickness of a raft foundation equal to the number of storeys times 80 to 100 mm. It also suggests sizing beams so that their depth in inches equals the length of the beam in feet, and that typical economical beam spans for special moment frames range from 20 to 30 feet with a minimum strap beam depth of 1'10".Read less