Purlins used in these PEBs are of either ZEE or ZED shaped Cold formed members having the min yield strength of 300 MPa. Today, Metal Buildings have evolved with design technology called Pre-Engineered Buildings (PEB), with clear span of 90 mtr. ZEE, ZED and CEE shaped purlins (Cold formed).Square and Rectangular hollow sections (Hot Rolled).Raw Material wise two types of Purlins are there Thus, Purlins are an important component of the building. Purlins also supports roof system, and are designed to take care of wind load acting on the roof, Live Load, Dead load of Sheeting or roofing and collateral loads like Ventilation duct load, sprinklers, lightings etc.The wind forces acting on the End Walls of the building get transferred by purlins to the main frame members and to the foundation, by means of bracings. Purlins are the structural load carrying members.Thus providing structural stability to the main frames by connecting them all along the building. Transferring the wind loads to the main frame, rafters and columns.The structural support of every building is made up of purlins. Purlins are the longitudinal horizontal members connecting the rafters along the length of the building. Purlin is a structural secondary member which forms the skeleton of the Metal Building. When the roof slope is shallow, there is a negative pressure that develops on the roof which tries to uplift the roof panels.īy choosing the right purlin spacing with a right roof profile, stability in roof is achievable. In the current trend most of the Metal Buildings are designed with shallow roof slope to get safe and economical building solution. A well-designed roof is an ideal solution to safeguard us from extreme weather conditions and all-natural calamities.īeing the most essential part of any industrial building, roofing is a vital component which needs to be maintained with stability and carried appropriately. While designing any new roof or renovating existing roof, it is important to check all technical parameters to attain perfection.
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