Steel profiles in a “Z” shape, also called Z-purlins, are mainly used for roofs. This load-bearing component, which acts as a link between the truss structure and the roof covering, offers many advantages. It can be used as a single or multi-span bridging.
Z-profiles are either edged or produced on roll-formers. The profiles issued from a roll former are only available in certain dimensions, but due to the high production speed they are very cost-effective. Whereas the production of any intermediate size is possible on a bending machine. As a standard, they are available in dimensions from 100 to 400mm height and material thicknesses from 1.5 to a maximum of 4mm. From a static point of view, Z-purlins are an alternative to wooden purlins and can span distances of up to 10m between trusses, provided that the statics have been taken into account considering factors such as roof pitch, snow zone, wind suction and any additional load. The weight of the purlin is reduced to a minimum due to the filigree cross-section and the high-performance steel used, whereby the weight advantage is noticeable in terms of costs and transport.
Profiled sheets, sandwich panels and other covering systems can easily be fixed to such Z-profiles using self-drilling screws.