Code of Practice for Safe Use and Operation of Suspended Working ...

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5.6.2 Where a working platform is raised or lowered by means of climbers orwinches with one suspension wire rope at or near each end, the workingplatform should be provided, at each suspension point, with a safety ropewith an automatic safety device mounted on it, such that the safety ropewith the automatic safety device will support the working platform in theevent of the failure of the primary suspension rope, the winch, climber orany part of the mechanism used for raising or lowering the suspendedworking platform (regulation 14(1) of the SWPR).5.6.3 The automatic safety device must be designed to cover the followingsituations:(a)(b)the breaking of one of the suspension wire ropes; andthe mechanical failure of one of the winches or climbers, causing aslow or rapid slippage of the wire rope. The maximum incline of theworking platform deck should be less than 25% (i.e. 1:4).5.6.4 The automatic safety device should not be used to stop and hold theworking platform under normal operating conditions. It should be engagedmechanically and must be operational after resetting. It should not bepossible to release the device under load but should allow the workingplatform to be lifted.5.6.5 The points of suspension of a suspended working platform should be atadequate horizontal distances from the face of the building or otherstructure so as to prevent the suspended working platform from cominginto contact with such face (regulation 6(a) of SWPR). The suspensionand safety rope should at all times be kept vertical during the raising,lowering or suspension of the working platform.5.6.6 Wire ropes or chains should be used for raising, lowering and suspensionof the working platform. They should be securely attached to the outriggersor other supports (regulation 6(b) & (c) of SWPR). In case of chains, theyshould comply with the requirements specified in BS 3114:1959-Specification for alloy steel chain, Grade 80-Polished short link calibratedload chain for pulley blocks.5.6.7 The wire ropes or chains used in the suspension system should be ofsuch lengths that the working platform should be capable of being loweredto the ground or a safe landing place (regulation 6(d) of SWPR).29
5.6.8 Adequate arrangements (e.g. traversing rope, slack rope device, or antitiltdevice etc.), should be used to prevent undue tipping, tilting or swingingof the working platform and to secure it to prevent undue horizontalmovement while it is being used (regulation 6(e) of SWPR).5.6.9 The wire rope or chains used in the suspension system should be in onecontinuous length and free from joints and repairs.5.7 Wire rope5.7.1 Only wire rope specified by the manufacturer of the working platformshould be used.5.7.2 Where the suspension of a working platform is by means of foursuspension ropes, that is, two at each end of the working platform, 6mmdiameter steel wire ropes would be the minimum acceptable requirement.Preferably, 8mm diameter steel wire ropes or above are recommended.5.7.3 Where the suspension of a working platform is by means of primarysuspension ropes and safety ropes, wire ropes used for primarysuspension ropes or safety ropes should be made of steel wire ropes ofnot less than 8 mm diameter and the diameter of the safety rope shouldnot be less than the diameter of the primary suspension rope.5.7.4 Each suspension and safety rope should have a factor of safety of notless than 8, based on the maximum rope tension when related to theminimum breaking load of the rope, or such other higher factors asspecified by the manufacturer of the winch or climbing device.5.7.5 Where the working platform is raised or lowered by a winch, there shouldbe at least two turns of the wire rope remained on the drum when theworking platform is at the lowest level (regulation 10(b) of the SWPR).5.7.6 Where the working platform is raised or lowered by a climber or tractionpulley, after the working platform has reached the ground or a landingplace, the free ends of the suspension and safety ropes should have aminimum length of three metres measured from the discharge of theclimber or traction pulley.30
Page 1 and 2: Code of Practice forSafe Use and Op
Page 3: This Code of Practice is prepared b
Page 9 and 10: Competent personA competent person,
Page 11 and 12: Registered professional engineerA r
Page 13 and 14: 3. DESCRIPTION3.1 This Code specifi
Page 15 and 16: 4. MANAGEMENT OF SAFE OPERATION OFT
Page 17 and 18: (e)(f)(g)(h)(i)(j)(k)the suspended
Page 19 and 20: 4.2.3 Responsibility of working per
Page 22 and 23: 5.2.2 Working platforms should be c
Page 24 and 25: 5.3.7.3 In the case of davit arm co
Page 26 and 27: 5.3.7.5 Where parapet wall clamps a
Page 29 and 30: 5.4 Stability Against Overturning5.
Page 31: 5.5 Counterweight5.5.1 Where counte
Page 35 and 36: 5.8.3 If the rope is to be wound on
Page 37 and 38: 5.10.4 The secondary brake should b
Page 39 and 40: 5.13.5 The place where persons acce
Page 41 and 42: 6. SAFE AND PROPER USE6.1 Erection,
Page 43: 6.3 Safety Belt and Lifeline6.3.1 E
Page 46 and 47: 6.5 Marking of Safe Working Load an
Page 48 and 49: 6.7.1.3 The working platforms shoul
Page 50 and 51: 7.2 Wire Ropes7.2.1 All ropes shoul
Page 52 and 53: 8.1.5 During the inspection, functi
Page 54 and 55: 8.2.13 Functional tests of the foll
Page 56 and 57: 8.4 Display and Keeping of Certific
Page 58 and 59: (c)(d)(e)(f)(g)in case of a tempora
Page 60 and 61: 14. Guidance note on classification
Page 62: Occupational Safety and Health Bran

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