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In timber roof figure shown below, the part represented by number 2 denotes ____________(a) queen posts(b) collar beam(c) tie-beam(d) straining beamThis question was posed to me in exam.I need to ask this question from Wooden and Steel Roof Truss topic in portion Different Type Roofs, R.C.C of Civil Engineering Drawing

Answer»

The correct choice is (B) collar BEAM

For explanation I would say: The PRINCIPAL rafters are linked by a collar beam supported by a pair of arch BRACES, which stiffen the structure and help to TRANSMIT the weight of the roof down through the principal rafters to the supporting wall.



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