ISO 12485-1998 PDF

Full title and description

ISO 12485:1998 — Tower cranes — Stability requirements. This International Standard specifies the conditions to be met when verifying, by calculation, the stability of a tower crane (as defined in ISO 4306‑3) subject to tipping and drifting, assuming the crane stands on a firm, level supporting surface or track.

Abstract

ISO 12485:1998 gives requirements and verification conditions for assessing tower‑crane stability by calculation. It defines the load situations and limiting conditions (tipping, drifting) to be considered and references crane vocabulary and related normative documents used to identify crane types and load cases. The standard is concise (only a few pages) and was intended to be used alongside other crane design and load‑calculation documents.

General information

• Status: Withdrawn / superseded.
• Publication date: 29 October 1998 (original publication, 1998).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 53.020.20 — Cranes.
• Edition / version: Edition 1, 1998.
• Number of pages: Short technical document — commonly listed as 4 pages in national catalogues.

Scope

Specifies the conditions to be met for verifying by calculation the stability of tower cranes subject to tipping and drifting. The standard assumes the crane is on a firm, level supporting surface or track and applies to tower cranes as defined in ISO 4306‑3. It is intended to define the verification conditions (load cases and limiting situations) rather than full structural design rules.

Key topics and requirements

• Definition of the stability verification objective for tower cranes (resistance to tipping and drift).
• Assumptions about supporting surface (firm, level surface or track).
• Reference to crane vocabulary and classification (ISO 4306‑3) for scope and terminology.
• Description of essential load situations and combinations to be checked for stability (as applied in proof‑of‑competence calculations).
• Short, focused procedural content intended to be used with more detailed design standards for structural calculations.

Typical use and users

Used by crane designers, structural engineers, manufacturers of tower cranes, testing and certification bodies, and safety/inspection authorities to verify crane stability in design review, conformity assessment and safety checks. It is normally applied alongside more comprehensive crane load and structural design standards.

Related standards

Key related documents include ISO 4306‑3 (Cranes — Vocabulary — Part 3: Tower cranes) for definitions and classification, and the later consolidated standard ISO 8686‑3:2018 (Cranes — Design principles for loads and load combinations — Part 3: Tower cranes), which superseded the material from ISO 12485:1998. National identical/adopted versions (e.g., PN/ISO 12485: 2002) and subsequent ISO crane series (ISO 8686 parts) are also relevant.

Keywords

tower crane; stability; tipping; drift; load combinations; crane verification; ISO 12485; crane vocabulary; ISO 4306; ISO 8686.

FAQ

Q: What is this standard?

A: ISO 12485:1998 is an ISO technical standard titled "Tower cranes — Stability requirements" that sets out conditions for checking the stability of tower cranes by calculation.

Q: What does it cover?

A: It covers the conditions and verification situations (tipping and drifting) to be considered when checking tower‑crane stability, under the assumption of a firm, level supporting surface; it references crane terminology and related normative documents.

Q: Who typically uses it?

A: Crane manufacturers, design and structural engineers, test/certification bodies and safety inspectors use the standard as part of the stability verification and conformity assessment process.

Q: Is it current or superseded?

A: ISO 12485:1998 has been withdrawn and the relevant content has been consolidated into newer crane standards; the material covering tower‑crane loads and stability is now covered by ISO 8686‑3:2018 (and related parts). The withdrawal/supersession was effected when ISO 8686‑3 (2018) was published.

Q: Is it part of a series?

A: Yes — it sits within ISO's crane standards maintained by ISO/TC 96/SC 7 and is related to the ISO 4306 series (crane vocabulary) and the ISO 8686 series (design principles for loads and load combinations for cranes).

Q: What are the key keywords?

A: Tower crane, stability, tipping, drift, load combinations, verification, ISO 12485, ISO 4306, ISO 8686.