Box Lintel 100 x 2400mm
The Keystone Box Lintels can be used for internal or external openings and with a variation of wall thicknesses. The Keystone Box lintel has perforations along its length acting as a plaster key. The Keystone box lintel is designed to carry the full load of wet masonry as soon as it is installed. The Box Lintels must have a minimum end bearing of 150mm on each side of the opening, bedded on mortar. The Box Lintel must be level 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. As an optional extra Keystone box steel lintels can be insulated.
The external lintel flange must project beyond the window/door frame and it is recommended that a flexible sealing compound is used between the underside of the lintel flange and the frame. When the underside of a lintel is exposed, its appearance can be enhanced by the addition of lintel soffit cladding. Care should be taken to avoid shock loading on lintels when used in conjunction with concrete floors or other heavy unites. The masonry above the lintel should be built in accordance with BS EN 1996-2:2006. Lintels must not be cut to length or modified in any way without consulting an Keystone engineer.
• Length: 2,400mm
• Width: 100mm
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