Which one of the following comprises two or more footings connected by a beam called strap ?
- AContinuous footing
- BSpread footing
- CCombined footing
- DCantilever footingCorrect
Solution
Concept
Strap (cantilever) footing
Step-by-step solution
1. A strap footing is two footings connected by a strap beam. 2. It is also called a cantilever footing.
Explanation
The strap beam transfers the moment of the eccentric footing to the adjacent footing.
Why the other options are wrong
A combined footing is a single slab supporting two or more columns, and a continuous footing is a strip.
Shortcut
Strap = cantilever footing.
Common mistake
Choosing a combined footing.
Correct answer: D) Cantilever footing