Different types of foundations are found in a building which ranges from
isolated footing, combined footing, strip footing, raft footing, pile foundations etc.
To select which foundation will be perfect for your building, the focus should be given to the structural requirement and soil conditions.
Reinforcement detailing of footing, as well as site analysis for the type of footing and structural design of footing, is equally vital for the structure. If the detailing is perfect,
it reveals the design need of the footing for structural strength.
A perfect detailing of reinforcement involves various factors like the cover to reinforcement
on the basis of ecological considerations for stability, least possible reinforcement and bar diameters,
exact dimensioning of footing etc.
Reinforcement Cover
The least density to primary reinforcement in footing should not be under 50mm if footing touches
with earth surface directly, and 40mm for exterior uncovered face like surface levelling PCC.
If surface levelling is unutilized, then it is necessary to indicate a cover of 75mm to cover the rough surface of excavation.
For raft foundation, the least cover to reinforcement should be 75mm whether build on PCC or directly on the earth surface.
No comments:
Post a Comment