Din En Iso 14122-3 Pdf «Must Try»

Guide: DIN EN ISO 14122-3 (Access systems — Part 3: Stairs, stepladders and guard-rails — practical overview and tips)

• Legally relevant: As a harmonized standard under the Machinery Directive (2006/42/EC), following it provides presumption of conformity. Essential for CE marking.
• Clear definitions: Specifies exact angles (30° to 38° for stairs, 60° to 75° for stepladders), tread depths, riser heights, and guardrail dimensions (min. 1100 mm height, knee rail, toe plate).
• Detailed diagrams: The PDF includes useful cross-sections showing handrail extensions, clearance zones, and load assumptions (e.g., 1.5 kN point load).
• Alignment with global standards: Identical to ISO 14122-3, so the PDF is valid internationally.
• Cross-referencing: Works well with parts 1 (general terms), 2 (platforms & walkways), and 4 (anti-slip surfaces).

• Tread depth must be at least the vertical step height minus 15 mm.
• The treads must be closed (no open risers) to prevent tools or feet slipping through.

| Mistake | Consequence | Requirement from Standard | |--------|------------|----------------------------| | Step angle > 45° | High risk of forward falling | Max 45° (Clause 4.2) | | No intermediate rail on guardrail | 100 mm sphere can pass through | Clause 6.2.2 | | Toe plate < 100 mm | Objects fall on lower level | Clause 6.3 | | Handrail height only 900 mm | Inadequate for tall users | Clause 6.2.1: 1100 mm min | | Landing omitted at top of stairs | No safe dismount area | Clause 5.6 |

• Height minimums for top rails and intermediate rails; toe boards where necessary to prevent objects falling.
• Openings limited to prevent a person or body part falling through (specific maximum gap dimensions).