(1) Normal r.c. superstructure founded on deep, stiff, heavily reinforced strip footings.
(2) Stiffer superstructure, to act as a Vierendeel truss and thus in effect becoming a stiff beam, with the foundation beam acting as the bottom boom of the truss.
The truss solution (2) showed signiﬁcant savings in construction costs and time.
Fig. 1.3 Stiff footing versus Vierendeel truss.