This article serves as a comprehensive resource. We will explore what ISO 14122-3 covers, how it differs from other parts of the standard, the technical specifications for stair angles, tread depth, guardrail heights, and—most importantly—where to obtain a legitimate, up-to-date for your safety documentation.
The standard is part of a five-part series:
You can find the DIN EN ISO 14122-3 standard in PDF format through various sources, including:
A: Angle. Stairs are 30°–45°; stepladders are 45°–75°. Stepladders allow steeper access where space is limited but have stricter tread design rules.
Any stairs or stepladders elevated more than 500 mm above surrounding level require guardrails.
DIN EN ISO 14122-3 sets critical safety requirements for permanent industrial access, mandating specific dimensions for guard-rails (minimum 1,100 mm height), stairs, and stepladders to prevent falls. It mandates rigorous verification through physical testing or calculation to ensure structural integrity. For a detailed look at the 2016 standard, visit ISO 14122-3:2016(en) . ISO 14122-3:2001(en), Safety of machinery
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