2 Steps
3 Steps
4 Steps

Safety Approval Report(EN-ISO 14122-3) available

Dutch patent no.: 2000298


CodeMark certified for Australia & New Zealand

  • Australia CM70087, New Zealand CM70088

Plenum height:
 ........ mm
to be specified from ceiling to roof deck.

  • Material: aluminium
  • Stair width: 450 mm 
  • Steps are anti-skid
  • Size steps: 360 x 140 x 26 mm 
  • Distance between steps: ca. 250 mm depending on plenum height
  • Steps can be horizontally adjusted


Not available for type Small, Large EI60, Large electric


The extension for Large scissor stairs can be used if the stair box is mounted in the suspended ceiling and there is a plenum that has to be bridged. The extension method used gives the stair two or more treads but the slope remains the same. This considerably increases safety because there is no need for hooks or treads installed vertically above each other.



The extension can be combined with Large scissor stairs. Other uses are not recommended. The construction and the material used guarantee a high level of stability and long-term safe usage.



The extension is available in versions with 2, 3 or 4 treads to span a plenum of 1,200 mm maximum.


Gorter Large scissor stair extensions:

  • With Aboma Safety Approval
  • Dutch patent no. 2000298
  • Adjustable anti-slip treads
  • With suspension brackets for top and bottom attachment
  • Fast delivery
  • 1-year warranty on climbing devices