isolated footing and design

2. Definition:
 Footings are structural members used to support
columns and walls and to transmit and distribute their
loads to the soil in such a way that the load bearing
capacity of the soil is not exceeded, excessive
settlement, rotation are prevented and adequate
safety against overturning or sliding is maintained.

4.  Types of isolated column Footing
1. Pad footing
2. Sloped footing

6.  Steps for Design of isolated footing
1. Size of footing
2. Net upward Pressure
3. Bending Moment
4. Depth of footing
5. Reinforcement
6. Check for one-way shear
7. Check for two-way shear
8. Check for development Length
9. Load transfer for column to footing

7. Example:
 Design an isolated square footing for a square column
400mm*400mm for axial load of 800kn.Use concrete
grade M-20 and Fe-250 steel grade. Take safe bearing
capacity of soil 120kn/m².Check for shear is not
required. Also draw neat sketch showing sectional
elevation and plan.

13. Thank You