Code of Practice for Safe Use and Operation of Suspended Working ...
Code of Practice for Safe Use and Operation of Suspended Working ...
Code of Practice for Safe Use and Operation of Suspended Working ...
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5.10.4 The secondary brake should be mechanically operated independently <strong>of</strong>the primary brake. It should be capable <strong>of</strong> arresting <strong>and</strong> sustaining theworking plat<strong>for</strong>m if the primary braking system fails <strong>and</strong> in the event <strong>of</strong>overspeeding <strong>of</strong> the working plat<strong>for</strong>m.5.10.5 Each climbing device should be provided with an automatic emergencytype secondary brake that could stop <strong>and</strong> hold 125 % <strong>of</strong> the rated load <strong>of</strong>the climbing device. If such a secondary brake is <strong>of</strong> the instantaneousstopping type, it should stop <strong>and</strong> hold its total load be<strong>for</strong>e the devicetravels a vertical distance <strong>of</strong> 450 mm. If such a secondary brake is <strong>of</strong> thedeceleration type, it should stop <strong>and</strong> hold its total load be<strong>for</strong>e the devicetravels a vertical distance <strong>of</strong> 1.2 m.5.10.6 Secondary brakes should be independent <strong>of</strong> the drive trains on all climbingdevices. In normal operation, such a brake should not engage be<strong>for</strong>e thedevice is stopped by the primary brake.5.11 Control Levers, Switches5.11.1 Every lever, h<strong>and</strong>le, switch, or other device used <strong>for</strong> controlling theoperation <strong>of</strong> any part <strong>of</strong> the suspended working plat<strong>for</strong>m (being a lever,h<strong>and</strong>le, switch, or other device the accidental movement or displacement<strong>of</strong> which is liable to cause danger ) should be, unless it is so placed as toprevent accidental movement or displacement, provided with a suitablespring or other locking arrangement to prevent any such accidentalmovement or displacement (regulation 12(a) <strong>of</strong> the SWPR).5.11.2 Every lever, h<strong>and</strong>le, switch, or other device <strong>for</strong> controlling the operation<strong>of</strong> any part <strong>of</strong> the suspended working plat<strong>for</strong>m should have either on oradjacent to it clear markings to indicate its purpose <strong>and</strong> mode <strong>of</strong> operation(regulation 12(b) <strong>of</strong> the SWPR).5.11.3 The control <strong>for</strong> the power unit <strong>and</strong> hence the climbing device should besuch that when manual application is released, the power unit will stop.5.11.4 Emergency stop device should be located at each operator control station<strong>and</strong> other places where emergency stop may be required. It should beoperative irrespective <strong>of</strong> whether the control station is in operation. Thedevice should be in red colour.34
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