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Www.dmp.wa.gov.au/ResourcesSafety Please read this before using presentation This presentation is based on content presented at the Registration of cranes.

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Presentation on theme: "Www.dmp.wa.gov.au/ResourcesSafety Please read this before using presentation This presentation is based on content presented at the Registration of cranes."— Presentation transcript:

1 Please read this before using presentation This presentation is based on content presented at the Registration of cranes information session held in July 2014 It is made available for non-commercial use (e.g. toolbox meetings, OHS discussions) subject to the condition that the PowerPoint file is not altered without permission from Resources Safety Supporting resources, such as brochures and posters, are available from Resources Safety For resources, information or clarification, please contact: or visit 1

2 Crane incidents in Western Australia – Recent learnings 2

3 1.Power failure – testing runaways 3

4 Power failure – testing – learnings Emergency stop devices do not always sufficiently simulate conditions under a power failure Depending on how the power failed, this can lead to a voltage “spike” Persons performing crane load tests require adequate testing criteria, and appropriate training to apply these criteria 4

5 2.Deflection and/or alignment requirements – learnings 5 Deflection and/or rail alignment requirements are as defined by: AS section 5.13 for structural deflections AS table for the rail alignment DMP has identified mine sites with failed rails and rail fixings, primarily associated with misalignment and deflection incompatibility.

6 3.Wind loading Uncontrolled movements of cranes due to wind load ‒ why? Designs not considering correct loading or factors specified in AS Crane manufacturers not understanding design requirements Sites not following the requirements of design 6

7 AS , section 2.3 states: AS , section 2.2 states: Wind runaways – requirements 7

8 AS table F3 8

9 AS table 3.1 9

10 4.Electrical isolation issues Regulation 5.29 Isolation of equipment Each responsible person at a mine must ensure that – electrical equipment at the mine is provided with full current isolating devices capable of being secured in the isolating position 10

11 Typical arrangement of electrical isolation 11 AS 1418, figure

12 Recommended actions for isolation From AS … safety is frequently introduced by making the stop buttons latch in the open state, mechanically and by requiring a reset by a start button to re-establish the contactor independently of the reset of the stop button contacts. The system described may be characterised as fail-safe provided that the probability that the contactor will open when commanded (its intended service) is within the appropriate ranges…. Call these control switches rather than isolators – otherwise they need to be lockable 12


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