140mm Solid Wall Box Lintel Standard Duty 750mm

Used to support openings in 100mm wide walls.
Steel Lintels may be propped to facilitate speed of construction.

Box lintels are manufactured from pre-galvanised mild steel BS EN 10346:2009 DX51D plus Z600 or grade Z275 to BS5977: part 2, 1983 (BS EN 845-2:2003).
There is a minimum zinc coating of 600g/m² galvanising including both sides.

If stainless steel lintels are required IG utilise stainless steel grade 304 2b to BS EN 10088- part 2 Astm 240 (European Grade 1.4307).
Box lintels can be insulated with expanded polystyrene and conforms to BS 13163:2008.

Box Lintels must have a minimum end bearing of 150mm on each side of the opening, bedded on mortar.
Level the lintel along its length and across its width. Masonry built must be laid on a mortar bed and all perpendicular joints to be filled with mortar.
Care should be taken to avoid shock loading on box lintels when used in conjunction with concrete floors or other heavy units.

Length 600-1800 1950-2100 2250-2400 2550-2700 2850-3600 3750-4200 4350-4800
L (kN) 18 30 25 20 35 30 25
Thickness (mm) 1.6 2.0 2.0 2.0 2.5 2.5 2.5
H (mm) 150 150 150 150 215 215 215