Lintel Type : Cavity Lintels
Cavity Width : 150-165mm
Lintel Duty : Heavy Duty
Thermally Broken : No
Wide Inner Leaf? No
Birtley
Birtley CB1501650 150mm Cavity Wall Lintel STD Duty
£97.82 (ex VAT)
2-3 Week Lead Time. Contact us for Alternatives if you need quicker
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The Birtley CB150 150mm Cavity Wall Lintel is a standard-duty steel cavity lintel designed for cavity widths of 150–165mm, with a 100mm outer leaf and 100mm inner leaf. This Wade listing is for the 1650mm length, which falls within Birtley's 1650–1950mm performance band. The lintel is manufactured from S275JR structural-grade mild steel and finished with a 65µm Supergalv hot-dip galvanised coating applied after fabrication. It also incorporates factory-fitted expanded polystyrene (EPS) insulation. The CB150 is not suitable for point loads or concrete floors.
CB150 at a Glance
Key Features
Standard-duty design
Designed for standard-duty cavity wall applications within Birtley's stated load and span limits.
150–165mm cavity
For cavity wall construction with a 100mm outer leaf and 100mm inner leaf.
Supergalv coating
65µm hot-dip galvanised coating applied after fabrication to BS EN ISO 1461.
Structural-grade steel
Manufactured from S275JR mild steel to BS EN 10025-2.
Factory-fitted EPS insulation
Includes expanded polystyrene insulation, which Birtley lists with a BREEAM A+ rating.
Inner-leaf plaster key
Includes a plaster key to the inner leaf to assist with the internal finish.
No baseplate
The CB150 design omits a baseplate. Birtley notes that the lack of a baseplate, together with factory-fitted insulation, helps reduce thermal bridging.
60-minute fire rating
Birtley states a 60-minute fire rating when finished with a two-coat plaster system.
Product Specifications
| Manufacturer | Birtley |
|---|---|
| Product reference | CB150 |
| Lintel type | Standard-duty cavity wall lintel |
| Cavity range | 150–165mm |
| Outer leaf | 100mm |
| Inner leaf | 100mm |
| Length | 1650mm |
| Product code | CB1501650 |
| Material | S275JR mild steel to BS EN 10025-2 |
| Finish | 65µm hot-dip galvanised Supergalv coating to BS EN ISO 1461 |
| Insulation | Factory-fitted expanded polystyrene (EPS), BREEAM A+ rating stated by Birtley |
| Inner leaf finish | Plaster key |
| Profile height for 1650–1950mm band | 117mm |
| Published weight for 1650–1950mm band | 10.1kg/m |
| Product standard | BS EN 845-2:2013+A1:2016 |
| Test standard | EN 846-9:2000/2016 |
| Fire rating stated by Birtley | 60 minutes with a two-coat plaster finish |
| Minimum end bearing | 150mm |
Published Load Information
Birtley's published CB150 table groups lintels by length band and provides the Safe Working Load (SWL), weight per metre and profile height. The 1650mm lintel listed by Wade sits in the 1650–1950mm band:
| Length band | SWL/UDL | Weight | Height |
|---|---|---|---|
| 1650–1950mm | 20kN | 10.1kg/m | 117mm |
Typical Applications
The CB150 is designed for suitable openings in cavity wall construction with a 150–165mm cavity, 100mm outer leaf and 100mm inner leaf. It is a standard-duty cavity lintel and should only be used where the opening and loading conditions are within Birtley's published limits.
Installation Requirements
- Bed the lintel fully on bricklaying mortar.
- Provide a minimum end bearing of 150mm.
- For external wall installations, use with a cavity tray. Birtley lists this as an external-wall requirement.
Optional Finishes and Product Options
Birtley lists alternative material options for the CB150, including Ultragalv 150µm coating and 304 stainless steel. Other listed configuration options include reduced-length flange, no rainwater drip, render mesh, no plaster key and closer plate. These are not all standard features of the product shown. Contact Wade to confirm which options can be supplied and whether they affect the price or lead time.
Technical Information
For full dimensions, load tables, declarations of performance and installation guidance, refer to Birtley's CB150 technical information.
Frequently Asked Questions
What cavity size is the Birtley CB150 designed for?
The CB150 is designed for cavities between 150mm and 165mm, with a 100mm outer leaf and 100mm inner leaf.
What duty is the CB150?
The CB150 is a standard-duty cavity wall lintel.
What is the published load for the 1650mm CB150?
Birtley publishes a 20kN SWL/UDL for the 1650–1950mm length band. This is not a point-load rating.
Can the CB150 support point loads or concrete floors?
No. Birtley states that the CB150 is not suitable for point loads or concrete floors.
What is the minimum end bearing?
Birtley specifies a minimum end bearing of 150mm.
Does the CB150 include insulation?
Yes. Birtley lists factory-fitted EPS insulation with a BREEAM A+ rating.
What fire rating does the CB150 have?
Birtley states a 60-minute fire rating when the lintel is finished with a two-coat plaster system.
Need Help Choosing a 150mm Cavity Lintel?
Contact Wade Building Supplies for help checking cavity dimensions, lintel length, bearing requirements and the right specification for your project.
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