Birtley CB70 Cavity Wall Standard Duty Lintel 2100 mm Underground Drainage 3 mm outer thread diameter

3 mm outer thread diameter

Heat loss reduced due to continuous seal around trap door

metals and other materials

Designed to convert vents into service terminals

5 Inlet 315 mm Diameter Shallow Access Chamber Base 190 mm Invert (Inc 2 Socket Plugs)

Birtley CB70 Cavity Wall Standard Duty Lintel 2100 mm Underground Drainage 3 mm outer thread diameterStandard duty cavity wall lintel manufactured from structural grade steel Cavity: 70 mm 85 mm Outer Leaf: 100 mm Inner Leaf: 100 mm 60 minute fire rating with 2 coat plaster finish Lack of baseplate and factory fitted expanded polystyrene insulation reduces thermal bridging Not suitable for point loads or concrete floors Loading SWL UDL Value: 20 kN