Download Reinforced Concrete Strip Footing Design Excel Sheet for free. A wall footing or strip footing is a continuous strip of concrete that serves to spread the weight of a load-bearing wall across an area of soil. It is the component of a shallow foundation. Strip foundations are used where the soil is of good bearing capacity.
Strip footings are also used on weak ground to increase the foundation bearing area, and thus reduce the bearing pressure – the weaker the ground then the wider the strip. When it is necessary to stiffen the strip to resist differential settlement, then tee or inverted tee strip footings can be adopted.
The size and position of the strip is directly related to the overall width of the wall. The principle design features of a strip foundation are based on the fact that the load is transmitted at 45 degrees from the base of the wall to the soil. The depth of a strip foundation must be equal to or greater than the overall width of the wall. The width of the foundation must be three times the width of the supported wall. It is vital that the strip foundation is strengthened through the inclusion of steel reinforcement.
The important loads to be considered while designing the Strip foundation are dead load, imposed load and wind load. Working with the spreadsheet given herewith, you can not only design reinforced and unreinforced concrete strip footings, but it can also be applied to find axial, bending moment and/or horizontal loads.
Using the spreadsheet will help verify uplift, overturning, sliding and bearing pressure for the reinforced concrete fitting. The spreadsheet also has a diagram, wherein, once you start entering the values, it gets solved and you can see the diagram of designed Strip Footing.
Download the Reinforced concrete Strip Footing Design Spreadsheet from the following link.