Catnic CN71A Solid Wall Box Lintel

This lintel is specifically designed for use in exterior solid walls.

The Catnic CN71A is suitable for openings up to 2400 mm.

A minimum bearing of 150 mm is required at each end of the lintel.

Yes, a key feature of the CN71A is its ability to support wet masonry immediately, allowing for continuous construction.

It features duplex corrosion protection, combining galvanised steel with a durable black powder-coat finish.

Yes, the Catnic CN71A includes integral insulation and a built-in damp proof course (DPC).

The lintel is designed to take two brick courses on its front flange.

While the box profile resists twisting, ensure the minimum 150 mm bearing is correctly applied at both ends. Verify the load applied does not exceed the lintel's specified capacity for its length. Incorrect installation or excessive loading can lead to deflection.

Inspect the affected area. If the black powder-coat finish has been scratched or damaged during transport or installation, the underlying galvanised steel may be exposed. Touch up any damaged areas with an appropriate corrosion-resistant paint to maintain the duplex protection. Ensure the DPC is functioning correctly to prevent moisture ingress.

Before placing any masonry, ensure the bearing surfaces are perfectly level. Use shims if necessary to achieve a level plane. Re-check the lintel's position and adjust before permanent fixing with masonry.