WB TYPE K & KD Series

Aluminum Floor Hatches

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Williams Brothers - WB Type K & KD Series Aluminum Floor Hatch | Door

Aluminum Floor Hatch with Diamond Plate Cover!

Steel non-drainage single leaf covers are constructed of 1/4″ diamond pattern plate and reinforced for a 150 lb/ft2 (732 kg/m2) live load. Features zinc plated and chromate sealed hardware, concealed hinges, and the T-CAMĀ® lifting system for ease of operation. By Bilco.


  • Cover: 1/4″ Reinforced Steel Diamond-pattern Tread Plate
  • Frame: 1/4″ Extruded Aluminum Angle Frame with Strap Anchors Bolted Around the Perimeter
  • Finish: Mill Finish Aluminum with Bituminous Coating Applied to Exterior of Frame
  • Latch: Type 316 Stainless Steel Slam Lock with Fixed Interior Handle and Removable Exterior Turn/Lift Handle
  • Hinges: Concealed Cast Steel Cam-action Hinges
  • Lift Assistance: Torsion Bars that Pivot on Cam-action Hinges
  • Automatic Hold-open Arm: Automatic Hold-open Arm with Grip Handle Release
  • Hardware: Zinc Plated/Chromate Sealed
  • Loading: 150 psf (732 kg/m2) Live Load


  • Custom Sizes: Available on Request

Models Available

  • K-1 Aluminum – 24″ x 24″
  • K-2 Aluminum – 30″ x 30″
  • K-3 Aluminum – 36″ x 30″
  • K-4 Aluminum – 36″ x 36″
  • K-5 Aluminum – 42″ x 42″

Manufactured by Bilco for The Williams Brothers Corporation of America. MADE IN USA.