Corrugated is the traditional and familiar S-Rib profile for roofing and cladding applications. It is the oldest and most commonly used roofing profile because of its easy handling and fixing properties and related strength. The S-rib is derived from sinus curve and offers very strong and structural properties. The 8.5/76 stands for 8.5 corrugations over the width of the sheet and 76 refers to the distance in millimetres between two consecutive curves.
The Corrugated profile virtually eliminates oil canning and the sheeting can be factory cranked, curved and bullnosed to various radii depending on customers' requirements. The overall width of a 8.5 Corrugated sheet is 700 mm and that of a 10.5 Corrugated sheet is 840 mm.
Corrugated tin roof sheets are available in a wide range of materials displaying various structural properties. It should be noted that the load span characteristics are only to be used as a broad guideline, as purlin spacing is also dependant on other factors such as the prevailing winds in a particular area, snow during winter periods, the presence of dust and other particles in industrial areas, the type of structure that is being erected, etc. We therefore recommend that an engineer be consulted to determine the purlin spacing for a specific application.
Corrugated tin roof sheets and vertical wall cladding (side cladding) must be laid with one and a half corrugation side lap and must be fixed through the crests of alternate flutes to purlins using 50 mm Tex screws into steel purlins and 65 mm Tex screws in the case of timber supports. All fasteners must incorporate 19 mm dia bonded washers. In order to qualify for a guarantee on Zincalume®, Colorbond®, Colorplus® and ZincAL® sheets the following fasteners supplied by Buildex Industries should be used: Metaltex Climaseal 3 for steel purlins and Timbertex Zacs 4 for timber purlins.