Question

What is ponding?

(a) excessive deflection of flat roof resulting in accumulation of rainwater

(b) excessive deflection of flat roof not resulting in accumulation of rainwater

(c) small deflection of flat roof resulting in accumulation of rainwater

(d) small deflection of flat roof not resulting in accumulation of rainwater

The question was posed to me by my college director while I was bunking the class.

I'd like to ask this question from Deflection & Holes in Beams in section Design of Beams of Design of Steel Structures

Answer 1

Right option is (a) excessive deflection of flat roof resulting in accumulation of rainwater

For explanation I would say: Excessive deflection of flat roof resulting in accumulation of water during rainstorms is called ponding and it causes damage to the roof material.