PROFILE 3 (SLW & ULTIMATE).pdf - Emenite Limited

3.23.2 FASTENERSFasteners are responsible for keeping corrugated sheets and their accessories in their position under theaction of gravity and wind forces, and to avoid premature failure, corrosion or leakages in a roof.Several factors must be taken into account when selecting the type and kind of fasteners: Structurematerial, purlin dimensions, etc. In all the cases, installation must comply with the recommendations givenby the manufacturers.For SUPERLIGHTWEIGHT ® and ULTIMATE ® roofing sheets, the recommended fastener is the standard62.5mm galvanized roofing nail with bituminous washer fixed when they are installed over wooden structurewhile hook bolts are adopted for steel truss systems as shown below.fig. 3.5NutWasherBituminous feltMetal CapFelt UnderlayAngle purlinThreaded rods bent to shape to t the purlin - HOOKBOLTS62.5mmStandardGalvanized nailin all the cases, the specifier and installer are advised to completely follow the recommendations given inthis technical manual regarding materials, diameters, position and number of fasteners.fig. 3.6Fixing with roofing nails62.5150SLW sheet62.5mm standardgalvanized nailTimber purlin18®PROFILE 3 MANUAL