Catnic Open Back Cavity Wall Extra Heavy Duty Lintel 2400mm - 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 lintel for cavity wall construction. The primary benefit is its extra-heavy-duty design, providing superior support for various loads and spans. A key consideration is ensuring proper installation, including adequate bearing and mortar curing time, to maximize performance.

All features

Model Part NumberCX90/100
BrandCatnic

Extended Product Information

FAQs

What is the safe working load (SWL) based on?

The Safe Working Load for this Cavity Wall Lintel is based on the Total Uniform Distributed Load over the Maximum Span using 150mm End Bearings.

Does the Catnic CX90/100 include 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.

What is the typical lifespan of the Catnic CX90/100?

The Catnic CX90/100, due to its duplex anti-corrosion finish, is designed for lifetime resistance in coastal marine and other harsh environments.

Are specific mortar mixes recommended for use with the lintel?

Use a suitable mortar mix compatible with the masonry units being used. Follow standard building practices.

What is the purpose of the drip on the leading edge?

The drip helps shed any water that may penetrate the window head brickwork, preventing water ingress.

Where can I find load tables for the Catnic CX90/100?

You can download the Catnic Lintel Load Tables for the Catnic CX90 from the Catnic website or your supplier.

What is the maximum span for the Catnic CX90/100?

The maximum span varies depending on the load. Refer to the load tables for specific spans and loads.

Troubleshooting

Lintel is sagging.

Check the bearing at each end; ensure it meets the minimum requirement of 150mm. Verify the load is within the lintel's capacity. Check for proper propping during mortar curing.

Cracks appear in the brickwork above the lintel.

Ensure the lintel is properly installed and adequately supported. Verify the load on the lintel does not exceed its SWL (safe working load) and allow sufficient mortar curing time before removing props.

Difficulty aligning the lintel.

Use shims to level the lintel during installation. Make sure the cavity width is correct.

Pros and Cons

Pros

  • Supports a wide range of loads including concrete floors, roof loads, and timber floors.
  • Provides excellent corrosion resistance due to its duplex coating.
  • The built-in DPC eliminates the need for a separate damp-proof course in most installations.
  • Offers thermal performance benefits due to continuous insulation.
  • Suitable for fair-faced inner leaf masonry.

Cons

  • Requires precise measurements and careful installation.
  • May require propping during installation to allow mortar to cure.
  • Heavier than standard lintels due to its extra-heavy-duty design.
  • Limited to cavity walls within the 90mm-105mm range.
  • Requires a minimum of 150mm bearing at each end.

Setup, Compatibility & Care

  1. Preparation: Ensure the opening is prepared according to the structural design, confirming the required span and load calculations.
  2. Placement: Position the lintel with the correct bearing (minimum 150mm) at each end.
  3. Leveling: Use a spirit level to ensure the lintel is perfectly horizontal.
  4. Mortar: Use a suitable mortar mix for the masonry units.
  5. Alignment: Ensure the inner and outer leaves are raised together.
  6. Propping: Provide temporary propping for wide openings to support the load during mortar curing.
  7. Compatibility: Designed for cavity walls with a 90mm-105mm cavity.
  8. Care: Protect the lintel from damage during handling and installation. Inspect for any damage before installation. Ensure that any cut edges are treated with a suitable zinc-rich coating to prevent corrosion.

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