The floor access door shall be Model DT-AHS as manufactured by U.S.F. Fabrication, Inc. with the size being specified on the plans.

Cover: 1/2-inch (12.7mm) steel diamond plate cover reinforced for a AASHTO H20-44 wheel load. Cover is bolted to frame when closed with 316 stainless steel allen-head bolts to allow for direct traffic loading--an allen-head socket with torque wrench will be provided with the door. The allen-head bolts must be tightened to 25 foot pounds of torque and securely fastened using Loctite 242 whenever the cover is closed to insure safe and proper performance of the door. The door shall be equipped with a steel flush lifting handle and 316 stainless steel hold-open arm with red vinyl grip that automatically keeps the cover in its open/upright position. (Upon request, manufacturer shall provide structural calculations showing that the door design meets the loading requirements of AASHTO H20-44.)
Lift Assist: Open, stainless steel, bolt-on, vertical compression springs for easy opening.
Frame: 1/2-inch (12.7mm) thick steel angle with anchors welded to the frame for casting into concrete. A steel skirt shall be welded to the frame to provide a combined height equal to the depth of the concrete slab.
Hardware: Tamper resistant hinges with recessed stainless steel pins and lugs.
Security: The cover shall have a recessed staple for a padlock.
Finish: Hot dipped galvanized.
Installation: Installation shall be in accordance with the manufacturers instructions. The entire frame, including the seat on which the reinforcing rests, shall be supported by concrete or other material designed to support the specified loading.
Warranty: Manufacturer shall guarantee against defects in materials and workmanship for a period of five years.