AS 5229.1:2021 pdf Cranes — Tolerances for wheels and travel and traversing tracks
1 Scope
This part of ISO 12488 specifes tolerances for construction assemblies and operational conditions of cranes and associated crane tracks as defned in ISO 4306-1. The purpose of the requirements in this part of ISO 12488 is to promote safe operation and achievement of the expected life of components by the elimination of excessive load effects due to deviations or misalignments from the normal dimensions of the structure.
Tolerances given are extreme values. The elastic deformations due to load effects are outside the scope of this part of ISO 12488. These will need to be taken into account at the design stage using other criteria to achieve the intended operation and performance.
Specifc values for particular crane types are given in other parts of ISO 12488.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 286-2, Geometrical product specifcations (GPS) — ISO code system for tolerances on linear sizes — Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts
ISO 1101, Geometrical Product Specifcations (GPS) — Geometrical tolerancing — Tolerances of form,
orientation, location and run-out
ISO 4306-1, Cranes — Vocabulary — Part 1: General
3 Terms and defnitions
For the purposes of this document, the following terms and defnitions apply.
3.1 construction tolerance
amount by which a specifc dimension is permitted to vary, resulting from the assembly of the complete crane and its tracks, in new, modifed, rebuilt or repaired buildings, before operational use
NOTE 1 This applies to new build or repaired or modifed cranes and tracks.
NOTE 2 The amount is given either by the absolute value of the difference between the limits of size, or by the allowable geometric variation.
3.2 operational tolerance
amount by which a specifc dimension is permitted to vary, resulting from the use of the crane and its tracks
6.4 Construction tolerances
6.4.1 General
The measurements shall be taken in the unloaded condition with the crane and its associated tracks supported in the manner in which they will be operated. Tables 2 to 6 show the appropriate tolerances. If technical documentation requires a means for differentiation of the tolerances, a suffx shall be added to the tolerance symbol, corresponding to the relevant table in this part of ISO 12488.
EXAMPLE A 2 is the construction tolerances for travelling tracks as per Table 2.
6.4.2 Rail joints
Construction tolerances shall be in accordance with Table 6.
6.5 Operational tolerances
The operational tolerances given in Table 7 shall be measured with the crane in the unloaded condition.
NOTE Tolerances in excess of those shown in Table 7 can result in unacceptable ride characteristics and additional stresses, leading to increased wear on rails, wheels, guide rollers etc., and possible damage to the supporting structure.
If any measurements are beyond the tolerances in Table 7, then investigations should be undertaken by a competent engineer and the appropriate action taken.
AS 5229.1:2021 pdf Cranes — Tolerances for wheels and travel and traversing tracks
