Extreme load lintel For 90-105mm Cavity, 110-115mm Inner Leaf Material used Supplied in a grey primed finish. Lintels manufactured from a universal beam section and 6mm structural grade steel plate Grade S275 to BS EN10025 Standard increment lengths Overall lengths are available in 50mm increments for lengths up to 6600mm. Optional extra As an optional extra, CXL lintels can be galvanised. Load ratios To achieve the loading figures shown, the lintel must be laterally restrained and have 200mm end bearing supports and innerto outerload ratios between 5:1 and 19:1. Separate DPC A separate flexible DPC must be installed during construction. Additional information Generally available in 7 to 10 working days.