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In steel roof trusses, the diameter of rivets used for large spans is _________(a) 10 mm(b) 15 mm(c) 20 mm(d) 50 mmThis question was addressed to me in unit test.This intriguing question comes from Trussed Roofs topic in division Roofing Materials of Construction & Building Materials |
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Answer» RIGHT answer is (c) 20 mm To elaborate: The NUMBER of rivets used at each joint in steel roof TRUSSES should be at least two. For small spans, GENERALLY 15 mm diameter rivets are used and for large spans, usually 20 mm diameter rivets are used. |
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