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When do strap footings are used in foundation?

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+1 vote
in Geotechnical Engineering II by (93.7k points)
When do strap footings are used in foundation?

(a) To transfer load of an isolated column

(b) Distance between the columns are long

(c) Two column loads are unequal

(d) All of the mentioned

This question was addressed to me during a job interview.

This key question is from Types of Foundation topic in portion Shallow Foundations of Geotechnical Engineering II

1 Answer

0 votes
by (243k points)
Right choice is (b) Distance between the columns are long

Explanation: A strap footing may be used where the distance between the columns is so great that the combined trapezoidal footing becomes quite narrow, with a high bending moment.

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