Birtley CB70 2100mm

Birtley CB70 Steel Cavity Wall Lintel - 2100mm

The Birtley CB70 is a standard duty steel lintel for cavity walls with a 70-85mm cavity and 100mm inner and outer leaves, supplied here in the 2100mm length. The open-back profile is roll-formed from mild steel and hot-dip galvanised after fabrication - Birtley's Supergalv finish - so cut edges and welds carry the same zinc protection as the faces, with no painted surfaces.

A factory-fitted expanded polystyrene infill reduces thermal bridging across the cavity, and the lintel achieves 60 minutes' fire resistance when finished with a two-coat plaster system. Used for supporting masonry over door and window openings and for new cavity wall construction where a standard duty galvanised lintel is required.

Specifications

Brand: Birtley
Type: Standard duty cavity wall lintel
Length: 2100mm
Size: 70-85mm cavity, 100mm leaves
Material: Galvanised mild steel
Application: Door and window openings in cavity walls

Key Features

• Standard duty rating for 70-85mm cavities
• Hot-dip galvanised after fabrication (Supergalv)
• Factory-fitted polystyrene insulation infill
• Open-back profile with no baseplate
• 60 minutes fire resistance with two-coat plaster
• No painted surfaces to maintain
• Not for point loads or concrete floors