Strength of cold formed steel zed purlins supporting standing seam metal roofing systems under wind uplift

Roofing systems along with the cold formed steel purlins are more popular in the secondary frame systems due to high strength to weight ratio and durability. Standing seam roofing sheets after installation provides lateral and torsional support to purlins. This support can alter the structural behavior of purlins and enhance the performance during wind uplift. This paper presents an experimental investigation on Z-purlins supporting standing seam metal roofing (SSMR) systems during wind uplift. The aim is to assess reduction factor for design in determining the nominal flexural strength of the purlin. Test results reveal the effect of the restraint provided by the SSMR systems to the Z-purlins in wind uplift. The test results obtained from the test are compared with Eurocode EN 1993-1-3 2006.

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