Birtley CB90 3900mm
On orders over £250
Easy returns policy
Expert Advice
Call us for technical support
Birtley CB90 3900mm
- Steel cavity wall lintel for 90‑105 mm cavity walls
- Length: 3900 mm span
- Standard‑duty structural grade steel with hot‑dip galvanised finish
- Supports up to 26kN uniformly distributed load
- Ideal for external masonry openings in residential construction
Birtley CB90 3900 mm Lintel
This standard‑duty CB90 lintel from Birtley is designed for cavity wall construction with a cavity width of 90‑105 mm and inner/outer leaves of 100 mm each. With a span of 3900 mm it accommodates wide openings while delivering structural performance.
Manufactured from structural‑grade mild steel, the lintel is hot‑dip galvanised after fabrication – providing up to 50% more zinc protection than alternative coatings. Alongside corrosion resistance, it features an efficient thermal profile and is suitable for use with external walls (not for point loads or concrete floors) when installed with required bearing at each end.
Specifications
Length: 3900 mm
Cavity Width: 90‑105 mm
Inner/Outer Leaf: 100 mm each
Load Capacity: 26 kN (UDL) approx
Finish: Hot‑dip galvanised steel
Height (typical): 197 mm
Key Features
- Large 3900 mm span for wide openings
- Supergalv post‑fabrication galvanised coating for long life
- Structural steel specification—complies with BS EN845‑2
- Minimises thermal bridging via design and insulation options
- Suitable for builders and tradesmen needing reliable cavity wall support