Why review ponding stability on nearly flat metal roof decks under sustained rain?
Choices
- (A) Water weight deepens deflection bowls accelerating trapped pond volume
- (B) Ponded water mass is hydrostatically neutral on flexible decks
- (C) Initial camber erases any risk after first storm
- (D) Roof drains never clog so ponding is fictitious
Correct answer: (A)
Water weight deepens deflection bowls accelerating trapped pond volume
Explanation
Flexible decks can enter runaway ponding unless slopes or stiffening resist it.