Open Back Cougar Lintels are for use in Cavity Wall construction. The lintels incorporate insulation, built-in plaster key and DPC. The lintels supports uniform distribution of masonry loads, timber floors and roof loads. Also suitable for fair faced inner leaf masonry. Duplex Corrosion Protection Built-in Plaster Key Built-in DPC Integral Insulation Formed from galvanised steel then powder coated Easy to use Cougar open back profile Standard lengths are available in increments of 300mm. This specific lintel is designed for cavity walls with a cavity range of 70mm to 85mm. Built for standard duty loading, it supports inner leaves from 100mm to 115mm and outer leaves between 100mm and 102mm.Each unit is formed from corrosion-resistant steel and offers reliable load support for domestic and light commercial builds. Coverage spans vary by size, typically from 900mm to 3600mm. The average weight per unit is approx. 18,600g.