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Difference Between Strip Footing And Strap Footing

What Is Strip Footing:

Strip footing is a component of shallow foundation which distributes the weight of a load-bearing wall across the area of the ground. It is also known as wall footing.

Strip footing is commonly used as foundations of load-bearing walls where the soil is of good bearing capacity. The footing usually has twice the width as the load-bearing wall, sometimes it is even wider. The width, as well as the type of reinforcement, are depending on the bearing capacity of the foundation soil.

Advantages And Disadvantages Of Strip Footings:

Advantages Of Strip Footing:

Simplicity of design, the possibility to build the foundation without expensive tools as well as its long-term operation.

Disadvantages Of Strip Footing:

Comparatively low durability, high cost in the final stages of construction (you must perform additional manual work, such as filling soil between the strips and its leveling, building floor etc), inability to make monolithic binding of the floor to the basement.

Strip footing

Strap Footing:

A strap footing is necessitated when a certain column footing has to be restricted in width due to unavoidable interference or boundary limitation. It is a type of combined footing and also known as cantilever footing.

In such footing, the outer and inner column is connected by a strap beam, does not transfer any load to the soil. The individual footing areas of the columns are so arranged that the C.G of the combined loads of the two columns pass through the C.G of the two footing areas. Once this criterion is achieved, the pressure distribution below each individual footing will be uniform.

Strap footing
Strap footing

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