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90 Barry’s Advanced Construction of Buildings
the relative advantage of a reinforced concrete strip over a mass concrete strip. Concrete is
spread and consolidated around the reinforcement and finished level ready for the walling.
Pad foundations
The foundation to piers of brick, masonry and reinforced concrete and steel columns is
often in the form of a square or rectangular isolated pad of concrete to spread a concentrated
load. The area of this type of foundation depends on the load on the foundation
and the bearing and shear strength of the subsoil, and its thickness on the strength of the
foundation material. The simplest form of pad foundation consists of a pad of mass concrete,
as shown in Figure 3.21 and Figure 3.22, illustrating a pier and foundation beam
Walls raised off
concrete ground
beams
Oversite
concrete
Piers support
ground beams
Pad foundations
support piers
Figure 3.21 Pad foundation.
Point loads from columns
transferred to pad foundation
Figure 3.22 Mass fill pad foundations.