Question
Download Solution PDFThe Indian Standard (IS) 800 : 2007 recommends, in taking advantage of reduced design forces, that the purlins be designed as
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
(i) Purlins are designed as continuous beams because they span over more than two truss joint and are supported by rafters.
(ii) Principal rafter is the top chord member of truss and is subjected to compressive forces from loads transferred by purlins at the nodes.
(iii) The rafters act as simply supported beams between the purlins.
(iv) The purlins are interconnected by sag rod or tie rod at the centre span of purlin to reduce bending moment and deflection in the purlin.
Last updated on Jul 8, 2025
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