Series H1N Access Frames and Covers SPECIFICATION: The H1N series access frames and covers as manufactured by Halliday Products, Inc. of Orlando, Florida shall have a 1/4-in. thick one-piece, mill finish, Type 304 stainless steel frame, incorporating concrete anchor plates 18-in. on-center. The inside of the frame shall have a door-support ledge on two (2) sides. Both frame and ledge must be supported by a full bed of Class A concrete. The door panel shall be 1/4" thick Type 304 stainless steel diamond plate, reinforced to withstand a live load of the H-20 designation. Door shall open to 90 degrees and automatically lock with a T-316 stainless steel hold-open arm with an anodized aluminum release handle. For ease of operation the hold-open arm shall incorporate enclosed stainless steel compression spring assist. Door shall close flush with the frame. Hinges and all fastening hardware shall be T-316 stainless steel. Unit shall lock with T-316 stainless steel slam lock with removable keys. Unit shall carry a Lifetime guarantee against defects in material and/or workmanship. NOTE: The Series H1N is suitable for use in off-street locations where not subjected to high density traffic.