Hi-Hatch DXCeiling Access Hatch

Custom-made size fitting to buildings. Can make large size of ceiling access hatch such as 900 × 900. Maximum size is 1200 × 1500.

Installation Location

  • Ceiling

Main Features

  • Custom-Made Size Available
  • Maximum Size Is 1200 × 1500 (mm)
  • Inner and Outer Frame Can Choose from Slim and Wide Frame
  • Can after Construction (only Outer Frame Is Wide Frame Type)
  • Can Install into Wooden Frame
  • (Corp.) Public Buildings Association Evaluating Product
  • Made-to-Order



  • 1 Lid

    Max Dimensions : 900 × 900 (mm), 1200 × 500 (mm)

  • 2 Lids

    Max Dimensions : 900 × 1500 (mm), 1200 × 1200 (mm)

  • 3 Lids

    Max Dimensions : 1200 × 1500 (mm)

Opening and Closing Part

  • Standard (Slide Lock) Type

  • Key Type (Key N301)

    Can Key Sharing with SD, AT, MOD

Color Variation

  • Silver Color



Outer Frame, Inner Frame, Slide Angle/ Extruded Aluminum A6063S-T5 Anodized (Custom-Made Color Available)

Model No. / Dimensions

Model No. Standard Type HHDX-909
Key Type HHDX-K909
Dimensions Standard Dimensions 909×909
Ceiling Opening Dimensions

(Outer Frame: Slim Frame)

Ceiling Opening Dimensions

(Outer Frame: Wide Frame)

Ceiling Backing Board Opening Dimensions 932×932
Inner Finishing Board Dimensions 896×896
Inner Backing Board Dimensions 890×890


Hanging Wire

To prevent falling inner frame by hanging the wire to inner frame and channel. Use it with spring hook attaches to (rotating axis side) the hole of inner frame.

For Square Stud Method “Z Screw”

Square stud method is construction technique using square stud differ from general construction steel-made ceiling base.

“Z screw” is NAKA Corporation’s original screw to fasten ceiling access hatch and square stud. There are some cases cannot available according to the combination of square stud method.

*Cannot available in case the outer frame is slim frame

Custom-Made Color Available



Channel Catch for DX

Use channel catch for DX to attach.