1.

Timber cannot be used as a sloping roof.(a) True(b) FalseThe question was posed to me in an internship interview.The doubt is from Roof Covering, Sloping Roof & Flat Terraced Roof in section Rules and Methods of Measurement of Civil Engineering Drawing

Answer»

Right OPTION is (b) False

Explanation: A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof. Trusses usually occur at regular intervals, linked by longitudinal timbers such as purlins. The space between each truss is known as a bay.

Timber roof trusses were a MEDIEVAL development. EARLIER roofs had been supported by coupled rafters – PAIRS of rafters linked by horizontal beams. But such roofs were STRUCTURALLY weak, and lacking any longitudinal support were prone to racking, a collapse resulting from horizontal movement.



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