OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 6 Cranes, Hoists and Lifting Devices

Section 95 Safe movement

Section 95(a)

The purpose of this requirement is to prevent a crane from over running its movement limits or making “uncontrolled, unintended contact” with other equipment that may be on the same rail, track or trolley. It does not restrict a competent operator from performing a controlled low-speed contact as may be required during a multiple crane lift. The requirement can be achieved through the use of (see Figure 6.26)

(a) shock-absorbing rail stops,

(b) rail-mounted rubber bumpers. When mounted on a crane, a rubber bumper is considered to be part of the crane and not a positive stop or limiting device capable of preventing contact,

(c) limit switches,

(d) speed-limiting motion or proximity sensors mounted on the crane,

(e) other equally effective means.

If the limiting device is disabled to permit the crane to make a controlled contact, the lifting pendant or control panel should be tagged to show that normal functioning of the limiting device has been disabled. Once the lifting operation is complete, the limiting device should be restored to normal function and the tag removed by the operator.

For more information
Preventing Overhead Crane and Hoist Collisions: Use of Rubber Bumpers

Figure 6.26 Examples of positive stops installed to protect a rail-mounted crane

Section 95(b)

The crane must be fitted with a device that prevents an overspeed descent of the load in excess of manufacturer’s specifications.

Section 95(c)

Figure 6.27 is an example of an acceptable means of ensuring that rails do not spread.

Figure 6.27 Tie rods that limit the spreading of rails

Section 95(d)

Figure 6.28 shows an example of acceptable sweepguards.

Figure 6.28 Example of trolley-mounted sweepguards

Section 95(e)

No explanation required.