Catnic Open Back Cavity Wall Extra Heavy Duty Lintel - CX90/100

Open Back Lintels are for use in Cavity Wall construction. The lintels incorporate insulation, bui...

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Product Information

Full details

This guide is for builders and construction professionals using the Catnic CX90/100 Extra-Heavy Duty Lintel. This lintel offers superior support for cavity walls, enabling the construction of robust and long-lasting structures. Keep in mind that proper installation, including adequate propping during mortar curing, is critical for optimal performance.

All features

Model Part NumberCG50/100
BrandCatnic

Extended Product Information

FAQs

What is the Safe Working Load (SWL) for this lintel?

The SWL is based on the Total Uniform Distributed Load (UDL) over the maximum span, using 150mm end bearings. Consult the Catnic Lintel Load Tables for specific values.

Does the lintel come with a built-in plaster key?

Yes, the Built-in Plaster Key on Catnic Lintels has Staggered Slots applied to the Inner Flange and Ribbed Underside of Insulation.

Is a separate DPC required when using this lintel?

No, a DPC is not required in most installations as the shape of the lintel provides a damp-proof course, directing moisture out of the cavity.

What are the standard lengths available?

Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at 3000mm-3600mm.

What is this lintel made of?

Formed from galvanised steel then powder coated.

Where can I find load tables for this lintel?

You can download the Catnic Lintel Load Tables for the Catnic CX90/100.

What types of loads can this lintel support?

It can support concrete floors, roof loads, timber floors, and attic trusses.

Does this lintel help with thermal performance?

Yes, it has a continuous insulated core to reduce cold bridging and improve thermal performance.

Troubleshooting

Lintel is not level after installation.

Ensure the supporting blockwork is level before installation. Re-adjust and re-level the lintel before mortar curing.

Visible cracking in the brickwork above the lintel.

Check the load capacity and span of the lintel. Ensure proper propping during mortar curing.

Moisture penetration in the cavity wall.

Verify the DPC is properly installed and that the cavity is clear of debris. Check surrounding brickwork and flashings.

Pros and Cons

Pros

  • High load-bearing capacity for diverse construction needs.
  • Excellent corrosion resistance for long-term durability.
  • Integrated DPC simplifies installation and enhances moisture protection.
  • Improves thermal performance, contributing to energy efficiency.
  • Suitable for various applications, including concrete floors and roof loads.

Cons

  • Requires careful installation to ensure proper load distribution and structural integrity.
  • Installation requires propping for mortar curing time
  • May require professional assessment for complex structural designs.

Setup, Compatibility & Care

  1. Preparation: Ensure the opening is prepared according to the structural plans. Check that the supporting blockwork is level.
  2. Placement: Position the lintel with a minimum bearing of 150mm on each end.
  3. Alignment: Ensure the lintel is level and aligned correctly with the inner and outer leaves of the cavity wall.
  4. Propping: Use temporary props to support the lintel and the load above until the mortar has fully cured. Wide openings should be suitably propped to allow for mortar curing.
  5. Mortar: Use appropriate mortar for the masonry.
  6. Compatibility: Compatible with standard cavity wall construction methods and materials. Ensure compatibility with the chosen brick or block type.
  7. Care: Protect the lintel from damage during handling and installation. Avoid overloading the lintel before the mortar has cured. The galvanised and powder coated finish requires no special maintenance.

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