RCC footing
Why is the trapezoidal shape given to a RCC footing instead of a cuboidal shape?
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Member • Nov 27, 2013
Trapezoidal shape is optimized from rectangular (or) cuboidal shape. Its not necessary to use Trapezoidal shape.gopaldeshpandeWhy is the trapezoidal shape given to a RCC footing instead of a cuboidal shape?
The reason is you are considering the load angle of 45deg from the bottom of the column. So the other part are not efficient to take the load. So we neglect that part.Are you sure? This action cannot be undone. -
Member • May 19, 2015
the shape is best suited considering the shear force and bending moments developed at the column base. trapezoidal shape gives economical results in terms of concrete qtysKSS manianTrapezoidal shape is optimized from rectangular (or) cuboidal shape. Its not necessary to use Trapezoidal shape.
The reason is you are considering the load angle of 45deg from the bottom of the column. So the other part are not efficient to take the load. So we neglect that part.
there is no major change in qtys of steel even if you design as a flat top footingAre you sure? This action cannot be undone.