AS 5236.1:2021 Cranes – Limiting and indicating devices Part 1: General (ISO 10245-1:2008, MOD).
device used to prevent slewing beyond specified limits
device used to prevent the extension or retraction of a member beyond specified limits
travelling and traversing limiter
device used to prevent all types of movement along rail tracks or runways beyond specified limits
working space limiter
device used to prevent a fixed load-lifting attachment and/or parts of the crane from entering a prohibited space
Note Ito entry: Working space limitation is often achieved by a combination of different limiters.
4 Safety requirements and/or measures
4.1 Limiters and indicators
4.1.1 The crane manufacturer shall select a device having a specification that is compatible with the designed use of the crane, taking the following into account:
a) the operating environment, e.g. relative humidity, freezing, condensation;
b) the rated capacity;
c) crane characteristics;
d) electromagnetic compatibility.
4.1.2 The installation of limiters and indicators shall be carried out in a manner that does not reduce the required strength of the crane.
4.1.3 The effects (e.g. forces, stopping distances) resulting from the operation of the limiter shall be within the design constraints of the crane.
4.1.4 Systems shall enable periodic functional checks to be carried out to verify that indicators are operating correctly.
4.1.5 If interruption of the power occurs, the setting of limiters and indicators shall be retained.
4.1.6 Devices shall be capable of withstanding the shock loads and vibrations transmitted to them during normal usage, erection, rope changing, dismantling and maintenance of the crane.
4.1.7 Painting or other corrosion protection shall not affect the correct functioning of limiters and indicators.
4.2 General requirements for rated capacity limiters and indicators
4.2.1 Rated capacity limiters and indicators shall be provided on all cranes having a rated capacity of 3 t and above. It is, however, recommended for cranes of 1 t and above, or an overturning moment of 40 000• m and above.AS 5236.1 pdf download.