Watertight (& Gastight) Angle Frame Heavy Duty Loading Single Door

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Watertight (& Gastight) Angle Frame Heavy Duty Loading Single Door

The Flood Resistant, sealed, gasketed and flush mounted floor access door is designed for applications where flooding may occur or in applications where ordors and gases may need to be suppressed. Designed for off-locations that may occasionally receive AASHO H20 wheel loads. Not designed for parking lots or other paved areas.

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Material: Aluminum, steel, or stainless steel available
Frame: Flush mount angle type with strap anchors
Removable Center Beam: Gasketed, flood resistant (Double leaf design only)
Covers: 1/4” diamond plate reinforced for AASHTO H20 wheel loads. (capable of holding up to 25ft. head of water
Gasket EPDM gasket around entire cover perimeter
Hardware: All 316 SS Hinges, nuts, bolts and washers
Hold-Open Device: 316 SS Hold-open arm with secondary latch mechanism
Lock Device: SS flood resistant camlocks
Lift Handle: Flush and flood resistant
Warranty: Ten (10) years on aluminum, Five (5) years on steel and stainless steel

Optional Features

  • Stainless steel horizontal springs or gas shocks for easy opening
  • Cylinder lock
  • Frame skirts for easy casting into a concrete top slab
  • Nut rails with stainless steel sliding nuts for attaching cable holders, brackets & other hardware
  • Fiberglass insulation with metal liner
  • Custom letterin
  • Anodized finish
  • Stainless steel safety chains with aluminum support posts
  • Fall Through Protection Systems
  • Slip resistant surface bonded to cover plate
  • All steel or stainless steel material


The watertight flood resistant floor access door shall be Model W-AHS or W-AHD as manufactured by USF Fabrication, Inc. with the size being specified on the plans. Door leaf shall be 1/4-inch thick aluminum diamond plate reinforced for an AASHTO H20-44 wheel load (capable of holding up to 25 ft. head of water). Upon request, manufacturer shall provide structural calculations showing that the door design meets the loading requirements of AASHTO H20-44. (The access door is designed for off-street locations that may occasionally receive AASHTO H20-44 wheel loads.) The bottom of the cover shall have a continuous groove to securely hold a 9/16-inch diameter EPDM gasket around its perimeter. The cover shall have 316 stainless steel floodtight cam locks to compress the gasket so that the door will not leak from standing water. The frame shall be 3/8-inch thick material with 3/16″ x 1-1/2″ strap anchors welded around the frame for casting into concrete. The floor access door shall be equipped with a flush floodtight handle that does not protrude above the cover, and a 316 stainless steel hold open arm with seondary latch mechanism that automatically keeps the cover in its upright, open position. The door shall have 316 stainless steel hinges with 316 stainless steel flat head bolts. 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.

Light Vehicular / Occasional Truck Traffic

ASTM C1802-20 Load Level 3 & 4