Trough Frame Pedestrian Loading Single Door

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Trough Frame Pedestrian Loading Single Door

The trough (channel frame) type floor access door with a drainable frame is designed for interior and exterior applications to reduce the amount of water, dirt and debris entering the area below. These doors should not be considered watertight for watertight applications see watertight/flood resistant doors.

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Material: Aluminum, steel or stainless steel available
Frame: 1/4”material; Extruded (aluminum only) or fabricated trough section with integral anchoring systems and 1- 1/2” threaded drain coupling
Covers: 1/4” diamond plate reinforced for 300 PSF Pedestrian loads
Gasket: EPDM Odor Reduction Gasket
Hardware: All 316 SS nuts, bolts and washers
Hold-Open Device: 316 SS Hold-open arm with secondary latch mechanism
Lock device: Staple for padlock protrudes through cover
Lift Handle: Recessed lift handle lays flush with top of cover
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
  • 316 Stainless steel watertight slamlock and other locking devices
  • Bituminous coating on frame surface in contact with concrete
  • Frame skirts for easy casting into a concrete top slab
  • Debris gasket
  • Fiberglass insulation with metal liner
  • Nut rails with stainless steel sliding nuts for attaching cable holders, brackets & other hardware
  • Custom lettering
  • Anodized finish
  • Stainless steel safety chains with aluminum support posts
  • Fall Through Protection Systems
  • Slip resistant surface bonded to cover plate
  • Side drain coupling (instead of standard bottom drain)
  • Reading Lid


The floor access door shall be Model TPS 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 a 300 p.s.f. live load. The frame shall be extruded aluminum trough section with an integral anchor flange on all four sides. The frame shall include an EPDM odor reduction gasket that reduces the amount of odor that escapes from below the door and a 1-1/2 inch threaded drain coupling. The floor access door shall be equipped with a flush lifting handle that does not protrude above the cover, and a 316 stainless steel hold open arm with secondary latch mechanism that automatically keeps the cover in its upright open position. The door shall have 316 stainless steel hinges and 316 stainless steel tamper resistant bolts/locknuts. A staple for a padlock shall be supplied for security. Installation shall be in accordance with the manufacturer’s attached instructions. The door shall be manufactured and assembled in the United States.

Light Vehicular / Occasional Truck Traffic

ASTM C1802-20 Load Level 3 & 4