Used to support openings in 215mm wide walls

The flange of the BOX/K-200 is designed to support a nominal masonry load only up to a maximum of 3kN per metre run

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

Keystone's standard range of lintels are manufactured from high quality grade pre-galvanised mild steel to BS EN 10346:2009 DX51D plus Z600 or grade Z275 to BS EN10025-2:2004 with minimised spangle finish and a minimum yield stress of 250N/msqm