GB/T 30024-2020 Cranes—Proof of competence of steel structures

Scope

This standard specifies the general conditions, requirements, methods, and parameter values for conducting capacity verification of crane metal structures based on the limit state method, for use in conjunction with the applicable parts of ISO 8686 regarding loads and load combinations.
This standard is universal and applies to all types of cranes. For specialized cranes, specific requirements for capacity verification may be specified by other standards.
Capacity verification is conducted through theoretical verification calculations and/or testing, with the aim of avoiding hazards related to structural performance based on established strength limits (such as yield limit, fatigue, brittle fracture).
According to ISO 8686-1, capacity verification calculations can be conducted using two methods: the limit state method with partial safety factors, and the allowable stress method with overall safety factors. While the validity of the allowable stress method is not excluded, this standard only addresses the limit state method.
This standard does not include capacity verification calculations for ancillary components (such as railings, stairs, walkways, and driver's cabins). However, the impact of these ancillary components on the main structure must be taken into account.

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