Direct Traffic Angle Frame Heavy Duty Loading Double Door

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Direct Traffic Angle Frame Heavy Duty Loading Double Door

The heavy-duty angle type floor access door is intended for use in direct traffic applications. Designed to receive AASHTO HL-93 wheel loads, for use in roadways up to and including those designated as ASTM C1802-14 load level 7. May not be suitable for some roadways inside or leading to seaport facilities, airports, military bases, freight terminals or other areas where extreme loading may occur.

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Material: Steel (hot dipped galvanized), stainless steel
Frame: 1/2” angle with special anchoring system welded to the frame and a skirt for a 12” top slab
Covers: 3/8” diamond plate reinforced for AASHTO HL-93 wheel loads
Hardware: 316 SS hinges and hinge pins
Hold-Open Device: 316 SS heavy duty hold-open arm
Locking Devices: Cover(s) are bolted to the frame with zinc plated grade 8 bolts Recessed staple for a padlock
Lift Assist: Stainless steel compression springs
Lift Handle: Flush with top of cover
Warranty: Five (5) years

Optional Features

  • Skirts for concrete slabs deeper than 12 inches
  • Nut rails with stainless steel sliding nuts for attaching cable holders, brackets & other hardware
  • Custom lettering
  • Stainless steel safety chains
  • Fall Through Protection Systems
  • Hinge covers on same long side (allows springs to be horizontal)


The floor access door shall be Model DT93-AHD as manufactured by USF Fabrication, Inc. with the size being specified on the plans. Covers shall be 3/8 -inch thick steel diamond plate reinforced for an AASHTO HL-93 wheel load. Upon request, manufacturer shall provide structural calculations showing that the door design meets the loading requirements of AASHTO HL-93. The frame shall be 1/2-inch thick steel angle with anchors welded to frame for casting into concrete. In the closed position the covers shall be bolted to the frame with 316 stainless steel allen-head bolts to allow for HL-93 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. For security both covers shall have a recessed staple for a padlock. The floor access door shall be equipped with flush steel lifting handles that do not protrude above the covers, and hold open arms that automatically keep the covers in their upright, open positions. A steel skirt shall be welded to the frame to provide a combined height equal to the depth of the concrete slab. The door shall have tamper resistant hinges with recessed stainless steel pins and lugs. The door shall have open, stainless steel, bolt-on, vertical compression springs to assist in opening the covers and reducing the force during closing. The floor access door shall have a hot-dipped galvanized finish. Installation shall be in accordance with the manufacturer’s attached 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 load. The door shall be manufactured and assembled in the United States. Manufacturer shall guarantee the door against defects in materials and workmanship for a period of five years.

Light Vehicular / Occasional Truck Traffic

ASTM C1802-20 Load Level 3 & 4