Catnic External Solid Wall Steel Lintel - CN71A

It is specifically designed and ideal for external solid wall applications and narrow cavity wall builds.

Yes, the Catnic CN71A is engineered to support wet masonry immediately upon installation, allowing for continuous construction.

The lintel is available in various lengths, and load capacities vary based on the span. You must calculate the required load (in kN) for your opening and choose a lintel length and type that meets or exceeds this capacity. For example, a 900mm lintel supports 29 kN, while a 2700mm lintel supports 20 kN. Always consult a structural engineer or relevant building regulations if unsure.

A minimum bearing of 150mm at each end is required for proper and safe support of the lintel.

No, the Catnic CN71A features a built-in DPC (Damp Proof Course) for integrated damp protection, simplifying installation and ensuring moisture resistance.

It refers to the superior protection achieved by combining galvanised steel with an additional powder-coated finish, offering enhanced and long-lasting resistance against corrosion.

Yes, it features integral insulation, which contributes to improving the thermal performance and energy efficiency of the wall opening.

This often indicates insufficient bearing, incorrect lintel selection for the calculated load, or improper installation. Verify that the minimum 150mm bearing is achieved at each end and confirm the lintel's load capacity matches or exceeds the calculated structural load. If deflection persists, consult a structural engineer immediately.

Check that the built-in DPC (Damp Proof Course) of the lintel has been properly integrated with the wall's overall damp-proofing system and that no other damp bridges exist. Ensure correct installation of any required flashing or cavity trays above the lintel.

Ensure the built-in plaster key on the lintel is clean and free of debris. Use appropriate plastering techniques for optimal adhesion to the lintel's surface. A primer compatible with galvanised steel might be beneficial in some cases.

Ensure accurate measurements of the structural opening were taken prior to purchasing. Do not attempt to force a lintel that is too long, or use one that is too short, as both can compromise structural integrity. Re-measure and acquire the correct lintel size.