The isolated footing is one of the most popular, economical and simplest type of foundation used world wide. An isolated footing is used support a single column. These are independent footings which are provided for each column. This types of footing used when-
- Columns are closely spaced
- Load on footing are less
- The Safe bearing capacity of soil is high.
TYPES OF BOTTOM SLABS
An isolated footing essentially consist of a bottom slab.There are three types of bottom slabs as follows-
- Pad Footing
- Stepped Footing
- Slopped Footing
DIFFERENT SHAPES IN PLAN
Isolated footing can have different shapes in plan, generally it depends up on the shape of cross-section of the column. Some of the popular shapes in the plan of the footing are-
- Square Footing
- Rectangular Footing
- Slopped Footing
STEPS TO CONSTRUCT AN ISOLATED FOOTING
- Positioning footing location
- Earth excavation
- Preparing the base
- Making form-work
- Placing reinforcement
- Proving cover block
- Placing column reinforcement
- Pouring concrete
- Removing form-work
- Back filling
