The type of Roof truss commonly used for spans varying from 5 m to 9 m is
- AQueen Post truss
- BKing Post Roof trussCorrect
- CBoth (A) and (B)
- DNone of the above
Solution
Concept
Suitable span range for King Post truss
Formula
NONE
Step-by-step solution
1. A King Post roof truss features a single vertical central post and two inclined struts. 2. It is suitable and economical for medium roof spans ranging from 5 m to 9 m. 3. Queen Post roof trusses are generally used for larger spans ranging from 9 m to 14 m. Answer: B
Explanation
A king post roof truss features a single vertical central post that supports the tie beam and is ideal for medium spans ranging between 5 to 9 meters. For larger spans between 9 to 14 meters, a queen post truss with two vertical posts is typically used instead. Therefore, the king post truss is the correct choice for a 5 to 9 meter span.
Why the other options are wrong
A) Queen post trusses are suitable for larger spans ranging from 8 m to 12 m. C) Queen post truss is used for spans above 8 m, so both are not suitable for 5 m to 9 m. D) Option B is the correct answer.
Shortcut
King Post truss = 5 to 9 m span; Queen Post truss = 8 to 14 m span.
Common mistake
Confusing the span range of King Post trusses (5 m to 9 m) with Queen Post trusses (8 m to 12 m).
Correct answer: B) King Post Roof truss