Overview - ISO/TR 25741-1:2025 (Rule by rule comparison)
ISO/TR 25741-1:2025 is a Technical Report that provides a systematic, rule‑by‑rule comparison of how selected seismic topics are treated across major national and regional standards for lifts and escalators subject to seismic conditions. This first part of the compilation report compares requirements from EN 81‑77:2018 (EU), ASME A17.1‑2016 / CSA B44‑16 (USA/Canada), New Zealand standards (NZS 4332‑1997, NZS 1170.5‑2004), Australian standards (AS 1735.1:2016, AS 1735.5:2001), and Japanese BSLJ / GFS:2016. The document is intended as a reference to aid standards writers, national committees, designers and users - it does not replace any of the individual seismic standards.
Key topics and technical content
- Rule‑by‑rule comparison: Side‑by‑side mapping of clauses and requirements for elevators, escalators and moving walks, showing where codes align or diverge.
- Scope and assumptions: Clarifies which equipment and seismic effects are included (selected topics only, excluding local deviations) and notes that design acceleration (ad) and placement of seismic detection systems should be agreed between customer and supplier/installer and provided by the building designer or owner.
- Seismic design principles: Discussion of risk analysis approaches referenced (e.g., EN ISO 12100 methods) and how different standards treat objectives such as preventing loss of life, avoiding entrapment, reducing damage and environmental hazards (oil leakage).
- Structural interface: Notes that the overall structural design of the lift installation and building support is often outside the scope of lift standards and must be handled with building‑design codes (examples shown for NZS).
- Comparative tables and figures: Tabulated comparisons for elevators/lifts and escalators/moving walks, highlighting clause‑level differences and commonalities to support harmonization.
Practical applications - who uses this report
- Standards developers and national committees - to review and harmonize seismic requirements.
- Lift and escalator manufacturers, designers and installers - to understand international differences and inform design choices for multi‑market products.
- Building designers and owners - to coordinate seismic design accelerations and interfaces with building structure.
- Regulators, inspectors and safety assessors - to interpret cross‑jurisdictional requirements during approvals and inspections.
Related standards (covered in the report)
- EN 81‑77:2018 (EU) and EN 115‑1:2017 Annex M
- ASME A17.1‑2016 / CSA B44‑16 (USA / Canada)
- NZS 4332‑1997, NZS 1170.5‑2004 (New Zealand)
- AS 1735.1:2016, AS 1735.5:2001 (Australia)
- BSLJ / GFS:2016 (Japan)
Use keywords: ISO/TR 25741-1:2025, lifts and escalators seismic, seismic standards comparison, EN 81-77, ASME A17.1, NZS 4332, AS 1735, BSLJ/GFS, design acceleration, seismic detection.