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In timber roof figure shown below, the part represented by number 3 denotes __________(a) collar beam(b) arch braces(c) rafter(d) queen postsI got this question by my college director while I was bunking the class.Question is from Wooden and Steel Roof Truss topic in division Different Type Roofs, R.C.C of Civil Engineering Drawing

Answer»

Right choice is (b) arch BRACES

Easiest explanation: Lacking a tie BEAM, the arch-BRACED (ARCHED brace) truss gives a more open LOOK to the interior of the roof. A double arch braced truss has a second pair of arched braces lower down, from the rafter to a block or inner sill: This form is called a wagon, cradle, barrel or tunnel roof because of this cylindrical appearance.



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