Acudor FC-H2O Channel Frame Access Door The Acudor FC-300 / H20 aluminum floor access doors are designed for interior and exterior applications where water tightness is required. The channel frame construction with 1-1/2" drainage coupling and inte gral anchor flange is designed to cast into concrete. The diamond plate door panel is equipped with a flush aluminum drop handle and an automatic hold open arm with red vinyl grip. Acudor FC-H2O Channel Frame Floor Access Door 36 x 36 Features:  9; 1/4" aluminum diamond plate reinforced to meet AASHTO specifications H2O-44 for traffic loading (16,000 lb. wheel load with 30% added for impact.) • Channel frame fabricated from aluminum extrusion with 1-1/2" drainage coupling and integral 1" anchor flange. • Stainless Steel butt hinges with tamperproof stainless steel bolts and nuts. • Automatic hold open arm with red vinyl grip allows door panel to open to 90 degrees, locking door in open position, and allowing for easy c ontrol when closing door panel. • Stainless steel compression springs can be provided to add lift assistance. • Flush aluminum drop handle with staple for padlock. • Mill finish, with optional bituminous coating on exterior of frame