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How many elements are generally there in a double roof?

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in Construction & Building Materials by (190k points)
How many elements are generally there in a double roof?

(a) One

(b) Two

(c) Three

(d) Four

I got this question by my school teacher while I was bunking the class.

Origin of the question is Single and Double Roofs topic in portion Roofing Materials of Construction & Building Materials

1 Answer

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Best answer
The correct choice is (b) Two

The explanation is: There are basically two elements in a double roof. These are rafters and purlins. The purlins provide intermediate support to the rafters.

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