How and where to use guide
S/K1502400 KEYSTONE S/K-150 X 2400mm Standard Cavity Wall Lintel
Typical applications
This lintel is commonly used in cavity wall construction to support masonry above window and door openings. It is appropriate for residential properties, small commercial buildings, and extensions where cavity wall construction is the chosen method. The 150mm depth makes it suitable for standard cavity wall thicknesses and typical domestic loading conditions.
- Window and door openings in cavity walls
- Residential and light commercial construction
- Openings up to 2400mm in width
- Standard domestic loading applications
Installation and positioning
The lintel should be positioned horizontally across the full width of the opening, bearing adequately on both supporting walls. Ensure the lintel is level and properly supported before laying masonry above it. The bearing length on each side of the opening is critical for structural integrity and should comply with building regulations and structural design requirements. Position the lintel at the correct height to align with your opening dimensions and allow for proper bed joint mortar.
- Install level across the full opening width
- Ensure adequate bearing on both supporting walls
- Check local building regulations for minimum bearing requirements
- Allow for mortar bed joints when calculating positioning
- Support temporarily until masonry is properly set
Maintenance and durability
Steel lintels require protection from corrosion, particularly in cavity wall applications where moisture can be present. Ensure the lintel is properly bedded in mortar and that any exposed steel is protected. Check that cavity trays and damp-proof courses are correctly installed to prevent water ingress that could lead to rust. Inspect periodically for any signs of corrosion or movement, particularly in older installations or high-moisture environments.
- Bed lintel fully in mortar to protect from moisture
- Ensure cavity trays are installed correctly
- Protect any exposed steel from direct water contact
- Check for corrosion signs during maintenance inspections
- Do not allow water to pool on or around the lintel
On-site handling and safety
Steel lintels are heavy and require proper handling equipment. Use appropriate lifting gear and ensure the lintel is supported safely during transport and installation. Never rely on temporary props alone for extended periods. Wear appropriate personal protective equipment when handling and installing. Ensure the lintel is not damaged during delivery or on site, as dents or bends may affect its structural performance.
- Use proper lifting equipment for safe handling
- Protect lintel from damage during transport and storage
- Wear appropriate PPE during installation
- Do not drop or impact the lintel
- Ensure temporary support is adequate until masonry is set