Complete Excavation ~ this method can be used in firm subsoils
where the centre of the proposed basement can be excavated first
to enable the basement slab to be cast thus giving protection to
the subsoil at formation level. The sides of excavation to the
perimeter of the basement can be supported from the formation
level using raking struts or by using raking struts pitched from the
edge of the basement slab.
Basement Excavations