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