Footing Detail Information

Footing detail design for building regulation drawings- Reinforced concrete strip footings are required for supporting all exterior walls and interior load-bearing walls.

Internal walls can be supported by increasing the thickness of the slab and suitably reinforcing it. The footings for most new houses should be located on a layer of soil or bed rock with decent bearing characteristics. Such soils would include marl, sands, granular materials and stiff clays.

A house foundation plan is required to suit the building regulations. The design must be capable once built to transfer the load of a building to the subsoil.

All foundations of all buildings are required to safely transmit to the ground the combined dead and imposed load. They should be capable of resisting corrosion and abrasion which may cause cracks or damage to the foundation.

Before choosing the type of foundations ground test should be made using trial holes, core analysis and local knowledge.

Ground types ranging from:

Rocks granites and chalks
Non cohesive soils, compact sands, loose uniform sands
Cohesive soils hard clays and silts
Peat and man-made ground

Building terms usually used on the drawing details include.

Bearing capacity which is the load that the ground can carry safely.

Backfill which are the materials filled in around the foundations walls.

Made ground including ground which has been made up to create level surface on which to work on.

Settlement which is ground movement caused by natural geographical movement’s air pressure and seasonal changes for example contraction and expansion. Clays are subject to large amounts of seasonal movement.

Foundations are usually made of either mass or reinforced concrete and can be considered under two headings.