Constructed with a channel frame for use in exterior applications or in those situations where there is concern of water or other liquids entering the access opening. Type J H20 floor access doors are reinforced for AASHTO H-20 wheel loading and feature steel construction, red oxide primer finish, and engineered lift assistance for easy one-hand operation. Available in a number of standard single leaf and double leaf (Type JD H20) sizes and special sizes can be specified.