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Description The Birtley HD50/200 is an extra heavy-duty steel cavity wall lintel that offers superior structural support for applications requiring extra load-bearing capacity. Fully compliant with EN845-2:2013 , this lintel is built for durability and long-term performance. Key Features: Hot Dip Galvanized : 65 micron zinc coating to EN1461:2009 for excellent corrosion protection. Optional U2K Galvanizing : Available with 150 micron zinc thickness for enhanced durability. Material : Manufactured from S275J0 steel, conforming to EN10025-1:2004 . Fully Insulated Cavity : Improves thermal efficiency. No Baseplate : Eliminates thermal bridging, preventing cold spots.