Standard Requirements EN 14122 for Stepladders

According to the standard EN ISO 14122 "Safety of machinery - Permanent means of access to machines and industrial plants" stepladders can offer secure access to heights for angles of incline between 45 ° and 75 °. The preferred angle of incline is between 45 ° and 60 °.

ISO 14122-3 is specifically dedicated to access stairs and stepladders in an industrial environment or for technical and maintenance access.

The following safety criteria are included in ISO14122-3 requirements:


  • Minimum depth must be 80mm
  • Maximum rise must be 250mm
  • Overlap must be a minimum of 10mm


  • The clear width between stringers or guard-rails must be within the range of 450mm to 800mm, preferably 600mm.

Climbing height:

  • A single flight must not exceed 3000mm.

Please contact our engineering department for a detailed review of the technical requirements of ISO14122-3 for your specific project.


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