Manufacturer of Roll Up Door Chain Keeper - Heavy Duty Support Brackets – Bestar

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Manufacturer of Roll Up Door Chain Keeper - Heavy Duty Support Brackets – Bestar Detail:

To be 3/16″ (4.76mm x 4.76mm) thick structural steel angles and a 1/4″ (6.35mm) thick steel diagonal brace welded in a triangular form to support ends of drum assembly.