Trapezoidal footing calculation methods for Concrete and Reinforcement Steel

Trapezoidal footing calculation methods for Concrete and Reinforcement Steel
A special case of footings is the trapezoidal footing, which may be used to carry two columns of unequal loads when distance outside the column of the heaviest load is limited. In such case using a rectangular footing may lead to the resultant of loads dos not fall at the middle length of the footing. To overcome this difficulty, a trapezoidal footing is used in such a way that the center of gravity of the footing lies under the resultant of the loads. Correspondingly, the distribution of contact pressure will be uniform.
in the attached file i try to explain the methodology of calculating various items such as concrete , reinforcement etc
 

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  • Trapezoidal Footing.xls
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