ISO 8100-33:2022

Overview

ISO 8100-33:2022 - "Lifts for the transport of persons and goods - Part 33: T-type guide rails for lift cars and counterweights" standardizes T‑type guide rails and their fishplates used to guide lift cars and counterweights in passenger and service lift installations. Published in 2022, this first edition replaces ISO 7465:2007 and defines material grades, manufacturing types, dimensional characteristics, geometrical tolerances and surface finish requirements, plus a designation system for guide rails.

Key topics and technical requirements

• Scope and applicability: Applies to guide rails used for guiding lift cars and counterweights in passenger and service lifts.
• Manufacture and materials:
  • Manufacturing types designated /A (cold‑drawn), /B (machined) and /BE (machined high quality).
  • Raw material steel grades include GR235 and GR275 with mechanical property ranges specified in the standard.
• Designation system:
  • Standardized naming format (e.g., ISO 8100-33-T82/A or ISO 8100-33-T140–1/BE/GR275) to unambiguously identify profile, manufacturing process and optional steel grade.
• Dimensional characteristics and tolerances:
  • Length tolerance specified as ±2 mm; 5 000 mm bars recommended.
  • Detailed dimensional tables for multiple T‑profile types (cold‑drawn parallel/inclined foot, machined types).
  • Geometrical tolerances and specific dimensions for blade, foot, holes, keyways and junction areas.
• Surface finish and machining:
  • Requirements for machined surfaces used to locate fishplates, blade shape, surface roughness (see normative ISO 1302), spot‑facing and machined edges.
• Fishplates:
  • Materials, dimensions, hole patterns and form tolerances for fishplates that connect guide rails.
• Normative references and symbols:
  • Uses ISO 1302 for surface texture indication and includes a comprehensive symbol/unit table for parameters (b, h, k, Ra, I, W, etc.).

Practical applications

• Use ISO 8100-33 to:
  • Specify and procure standardized T‑type guide rails and fishplates for new lift installations.
  • Ensure interchangeability and quality control across manufacturers and suppliers.
  • Guide manufacturing, inspection and acceptance testing of guide rails regarding dimensions, tolerances and surface finish.
  • Support structural and safety assessments where guide‑rail geometry and material properties affect behavior.

Who should use this standard

• Lift component manufacturers, fabrication shops and millwrights
• Lift designers, structural and mechanical engineers
• Installers, maintenance teams and site inspectors
• Procurement officers and compliance assessors specifying lift components

Related standards

• ISO 1302 (surface texture indication)
• Other parts of ISO 8100 covering different lift components and profiles

Keywords: ISO 8100-33, T-type guide rails, lifts, guide rails, fishplates, dimensional tolerances, surface finish, GR235, GR275, lift installation.