Basic Sizing ~ the size of a foundation is basically dependent on
two factors †1. Load being transmitted, max 70 kN/m (dwellings up to 3 storeys).- Bearing capacity of subsoil under proposed foundation.
Bearing capacities for different types of subsoils may be obtained
from tables such as those in BS 8004: Code of practice for
foundations and BS 8103-1: Structural design of low rise buildings.
Also, directly from soil investigation results.Foundations---Basic Sizing