Catnic Internal Heavy Duty Solid Wall Box Lintel - BHD100 Benefits: Duplex corrosion protection: Ensures optimum durability and longevity Integral Plaster key: With staggered holes to three sides of box profile Product Applications: For 100mm Interior Solid Walls Universal application caters for all loading conditions: Direct floor or roof load; Supports concrete floor loads; Supports point loads e.g. steel beams Standard Lengths (mm) 750-1500 1650-2100 2250-2700 2850-3600 3900-4800 SWL (kN) 29 39 39 51 51 Weight (kg/m) 7.5 9.4 12.4 15.7 18.8 Nominal height\'h\' (mm) 143 143 219 219 295 Note: Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm to 4800mm (including 4575mm, but excluding 4500mm).