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Access door frame shall be fabricated from 16 gauge stainless steel and provided with masonry anchors and bolt holes. Access door panel shall be fabricated from 20 gauge, stainless steel. Door shall be filled with 2 inch thick, fire rated insulation, and be welded pan type. Access door shall have spring automatic closer, be self-latching and contain interior latch release. Exterior latching shall be recessed and universal self-latching bolt, operated by either a knurled knob or flush key.