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Description The Birtley TF50 Timber Frame 50mm Cavity Wall Lintel is designed for use in timber frame constructions with a cavity depth of 50-65mm and a 100mm outer leaf. This standard-duty lintel requires the use of a pinch batten and offers other cavity sizes for flexibility in design. Key Features: Supergalv Coating : Provides up to 50% more zinc protection for enhanced durability. Post-fabrication Galvanizing : Ensures all surfaces are properly protected, reducing the risk of corrosion. High-Quality Material : Made from structural grade mild steel S275JR to EN10025 standards. Fire Rating : Offers up to 60 minutes of fire resistance with a two-coat plaster finish. Insulation Options : Available with Expanded Polystyrene insulation, BREEAM rating A+.