ISO 16881-1-2024 PDF

Full title and description

Cranes — Design calculation for wheel/rail contacts and associated trolley track supporting structure — Part 1: General. This international standard specifies requirements and formulae for selecting wheel size (steel and cast‑iron) and for calculating local stresses in crane trolley tracks and supporting structures resulting from wheel/rail contacts; it applies to metallic contacts and excludes roller bearings.

Abstract

This document gives designers rules and calculation methods for wheel/rail contact effects on crane trolley wheels and the associated supporting structure. It presents procedures to select appropriate wheel sizes (steel or cast iron), provides formulae to determine local stresses caused by wheel loads on trolley track components, and is intended for design (limit‑state) purposes only. The standard is intended to be used together with the ISO 4301 classification and the loads/load combinations in the ISO 8686 series. It does not cover roller bearings.

General information

• Status: Published
• Publication date: 22 July 2024
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 53.020.20 (Cranes)
• Edition / version: Edition 2 (2024)
• Number of pages: 29

Bibliographic and publication details as listed by ISO and national bodies.

Scope

This part (Part 1: General) sets out the design‑calculation principles for wheel/rail contacts and the associated trolley track supporting structure of cranes. It applies to metallic wheel/rail contacts (steel and cast‑iron wheels) used on crane trolleys and provides the basis for calculating local stresses in structural components caused by wheel loads. It is intended for limit‑state design and must be used alongside the ISO 4301 classification and ISO 8686 load definitions; roller bearings are explicitly excluded from this document's scope.

Key topics and requirements

• Principles for selecting wheel size for crane trolley wheels (steel and cast iron).
• Formulae and calculation methods to determine local contact stresses transferred to trolley track and supporting structures.
• Use of the limit‑state design approach referenced to ISO 8686‑1 and related load combinations.
• Applicability limited to metallic contacts; roller bearings are excluded.
• Guidance on assumptions, load cases and combinations relevant to wheel/rail interactions on crane trolleys.

These topics reflect the main technical requirements and the intended design use of the standard.

Typical use and users

Primary users are crane designers, structural and mechanical engineers, manufacturers of crane trolleys and track systems, verification engineers, and standards committees. The standard is used during the design and verification stages to size wheels, predict local stresses on trolley tracks and supporting structures, and ensure compatibility with ISO classification and load definitions.

Related standards

Key related documents include the ISO 4301 series (crane classification) and the ISO 8686 series (loads and load combinations); this 2024 edition of ISO 16881‑1 replaces the 2005 edition (ISO 16881‑1:2005). Designers should consult those standards in conjunction with this Part 1 document.

Keywords

cranes; wheel/rail contact; trolley track; wheel sizing; steel wheels; cast‑iron wheels; limit‑state design; ISO 4301; ISO 8686; trolley supporting structure

FAQ

Q: What is this standard?

A: ISO 16881‑1:2024 is an international standard that specifies design calculation methods for wheel/rail contacts and the associated trolley track supporting structure for cranes (Part 1: General).

Q: What does it cover?

A: It covers selection of wheel sizes (steel and cast iron), provides formulae to calculate local stresses in trolley tracks and supporting structures due to wheel loads, and sets out assumptions and load cases for design. It is intended for metallic contacts only and excludes roller bearings.

Q: Who typically uses it?

A: Crane designers, structural/mechanical engineers, trolley and track manufacturers, testing and verification engineers, and standards committees use this standard during design and verification stages.

Q: Is it current or superseded?

A: Current. ISO 16881‑1:2024 (Edition 2) was published on 22 July 2024 and replaces ISO 16881‑1:2005.

Q: Is it part of a series?

A: Yes — this is Part 1 (General) of the ISO 16881 series addressing design calculations for wheel/rail contacts and related trolley track supporting structures; it is intended to be used with related ISO series such as ISO 4301 and ISO 8686.

Q: What are the key keywords?

A: cranes; wheel/rail contact; trolley track supporting structure; wheel sizing; limit‑state; steel wheels; cast‑iron wheels; ISO 4301; ISO 8686.