Catnic Extra Heavy Duty 150mm Cavity Lintel CX150/100 by Catnic Catnic Extra Heavy Duty 150mm Cavity Lintel CX150/100 by Catnic
Catnic Extra Heavy Duty 150mm Cavity Lintel CX150/100 by Catnic Catnic Extra Heavy Duty 150mm Cavity Lintel CX150/100 by Catnic
Catnic Extra Heavy Duty 150mm Cavity Lintel CX150/100 by Catnic Catnic Extra Heavy Duty 150mm Cavity Lintel CX150/100 by Catnic
Catnic Extra Heavy Duty 150mm Cavity Lintel CX150/100 by Catnic Catnic Extra Heavy Duty 150mm Cavity Lintel CX150/100 by Catnic
Catnic Extra Heavy Duty 150mm Cavity Lintel CX150/100 by Catnic
Catnic Extra Heavy Duty 150mm Cavity Lintel CX150/100 by Catnic
Catnic Extra Heavy Duty 150mm Cavity Lintel CX150/100 by Catnic
Catnic Extra Heavy Duty 150mm Cavity Lintel CX150/100 by Catnic
Lintel Type : Cavity Lintels
Cavity Width : 150-165mm
Lintel Duty : Extra Heavy Duty
Thermally Broken : No
Wide Inner Leaf? No

Catnic

Catnic CX150/100 Extra Heavy Duty 150mm Cavity Lintel

£144.00
Cavity Lintel

£120.00 (ex VAT)

VAT included. Shipping calculated at checkout.
Product Availability
Current Lead time 5-12 Days. Call for options if you need quicker

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The Catnic CX150/100 Extra Heavy Duty 150mm Cavity Lintel is designed for high-load masonry cavity wall construction with a 150–165mm cavity, a 100–115mm inner leaf and a 100–102mm outer leaf. Its open-back steel profile allows both masonry leaves to be built up continuously, while integral insulation, a built-in DPC and plaster key provide additional construction benefits. We supply 19 lengths from 900mm to 4200mm, with safe working loads from 32kN to 60kN depending on length.

Catnic CX150/100 key features

Extra heavy duty loading

Designed for high-load cavity wall openings, with safe working loads up to 60kN depending on lintel length.

150–165mm cavity walls

Designed for a 100–115mm inner masonry leaf and a 100–102mm outer leaf.

Open-back construction

Allows masonry to be built up continuously on both leaves and is suitable for fair-faced inner leaf masonry.

Built-in DPC

Incorporates a damp-proof course. Additional DPC may be required in some situations, depending on installation and exposure conditions.

Continuous insulation and plaster key

Integral insulation helps reduce thermal bridging, while the plaster key assists with finishing.

Duplex corrosion protection

Manufactured from galvanised steel with Catnic's protective black polyester powder coating.

Dimensions and specification

Catnic CX150/100 technical specifications
Manufacturer Catnic
Product code CX150/100
Lintel type Extra heavy duty cavity wall lintel
Cavity width 150–165mm
Inner leaf 100–115mm
Outer leaf 100–102mm
Lengths available 900–4200mm, with 19 sizes available
Manufacturer's length range 900–4800mm
Nominal section height 232mm
Nominal end bearings 150mm at each end
Safe working load 32–60kN, depending on length
Built-in DPC Yes. Additional DPC may be required in some situations.
Plaster key Integral
Insulation Integral insulation
Finish Galvanised steel with black polyester powder coating

Catnic CX150/100 sizes and safe working loads

The safe working load of the CX150/100 depends on its length. The following table covers all 19 sizes we offer, with Catnic's published nominal weights and loading capacities.

CX150/100 lengths, safe working loads and weights
Length Safe working load Nominal weight
900mm 60kN 16.34kg
1050mm 60kN 19.06kg
1200mm 60kN 21.78kg
1350mm 60kN 24.50kg
1500mm 60kN 27.23kg
1650mm 60kN 29.95kg
1800mm 60kN 32.67kg
1950mm 60kN 35.39kg
2100mm 60kN 38.12kg
2250mm 60kN 40.84kg
2400mm 60kN 43.56kg
2550mm 60kN 46.28kg
2700mm 60kN 49.01kg
2850mm 55kN 51.73kg
3000mm 55kN 54.45kg
3300mm 50kN 72.01kg
3600mm 50kN 78.55kg
3900mm 50kN 85.10kg
4200mm 32kN 91.64kg

Where to use a Catnic CX150/100 cavity lintel

The CX150/100 is intended for extra heavy duty masonry cavity wall construction with a 150–165mm cavity. It is designed for specified masonry, timber floor and roof loads, with applications including suitable concrete floor, roof and truss loading arrangements where the structural design and manufacturer specifications permit.

The open-back profile allows masonry to be built up continuously on both leaves and is suitable for fair-faced inner leaf masonry.

Choosing the correct lintel length

Catnic's published loading figures use nominal 150mm end bearings at each end. As a general starting point, the required lintel length is calculated by adding 300mm to the clear structural opening width.

For example, a 2100mm structural opening would normally require a 2400mm lintel, allowing 150mm bearing at each end. The selected size must also provide adequate safe working load for the structure above.

Installation and support requirements

Both masonry leaves should be raised together, and the supporting wall construction must provide suitable end bearings. Follow Catnic's installation requirements for temporary support, loading and lateral restraint during construction.

When using Catnic CH and CX open-back lintels with concrete floors, the blockwork must be built tightly against the inner vertical face. Catnic also requires a mortar joint at the top of the blockwork to distribute the floor-unit load evenly over the lintel's inner flange.

For standard duty 150–165mm cavity wall construction, compare our Catnic CG150/100 Standard Duty Cavity Lintel.

For extra heavy duty applications with a narrower 90–105mm cavity, we also supply the Catnic CX90/100 Extra Heavy Duty Cavity Lintel.

Explore our cavity lintels or browse our full Catnic lintel range for other wall dimensions and loading requirements.

Technical downloads

Catnic lintel video guide

Watch the Catnic lintel video guide (opens in new tab)

Frequently asked questions

What cavity width is the Catnic CX150/100 designed for?

The CX150/100 is designed for 150–165mm cavities, with a 100–115mm inner masonry leaf and a 100–102mm outer leaf.

What lengths of Catnic CX150/100 do you supply?

We offer 19 lengths from 900mm to 4200mm. Choose the size required from the options above, and check its safe working load before ordering.

What is the safe working load of a CX150/100 lintel?

The safe working load depends on length. Catnic specifies 60kN up to 2700mm, 55kN at 2850–3000mm, 50kN at 3300–3900mm and 32kN at 4200mm. These ratings are subject to the manufacturer's loading conditions.

Does the CX150/100 have a built-in DPC?

Yes. The CX150/100 incorporates a built-in damp-proof course. Additional DPC may be required in some situations, depending on installation and exposure conditions.

Does the CX150/100 have integral insulation and a plaster key?

Yes. Catnic supplies the CX150/100 with integral insulation and a plaster key to assist finishing.

Can the CX150/100 support concrete floors?

Yes, where Catnic's specified loading and installation conditions are satisfied. For concrete floor applications, blockwork must be tight against the lintel's inner vertical face, with a mortar joint above the blockwork to distribute floor-unit loading evenly over the inner flange.

How much end bearing does the CX150/100 require?

Catnic's published safe working loads are based on nominal 150mm end bearings at each end. Check the selected length and structural loading before installation.
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Catnic Extra Heavy Duty 150mm Cavity Lintel CX150/100 by Catnic

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