Materials & Construction
• Door leaf: Double skin steel door, nominal overall leaf thickness 48 mm (typical).
* Outer/inner skins: 1.2-1.5 mm cold-rolled steel plates.
*Core: Mineral wool (non-combustible) infill or equivalent fire-rated core to achieve 120 minutes integrity and insulation.
• Edge construction: Hemmed edges or welded seam; factory fitted intumescent strips at head and jambs.
Frame: Steel welded frame, formed from 2.0-3.0 mm steel with anchor plates for fixing to masonry/structure.
Finish: Primer (zinc-phosphate) + polyester powder coat, or galvanize + paint (specify color and finish).
Threshold: Rebated low-profile threshold; stainless steel drip cover optional.
Threshold designed for smoke/air seal and compatibility with 2-hour rating.