HSE: Industrial rope access - investigation into items of personal ...

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6.2.4 Ushba Stop-Lock Material: Titanium Weight: 132 gm Design principle: Body loaded Method of use: Fall arrest Figure 24 Ushba ‘Stop-Lock’ back-up device Markings: Front face “EN567” AND “UIAA” on the rear. The device does not show the Certificate European (CE) mark. Performance in use: Installation on the rope is easy, although the device must be unclipped momentarily. It runs quite freely both up and down 10.5 mm rope, although occasionally sticks when descending. It can be tensioned onto the back-up rope easily, but if unloaded briefly it may drop down the rope. It can be released from the loaded position easily, and is generally easy to use and very compact. Test performance: The Ushba ‘Stop-Lock’ fared very badly in the dynamic tests. Only two devices were available for the dynamic tests and both of these cut the rope completely, without any slippage, at a peak force of 5.5 kN. The devices were too distorted and damaged to test again. This would appear to be a serious design fault and the Stop-Lock cannot be recommended for use as a back-up device. No further tests were carried out. 43
6.2.5 Komet Stick Run Material: Steel Weight: 474 gm Design principle: Cam loaded Method of use: Fall arrest Figure 25 Komet Stick Run back-up device Markings: On the spine, “KOMET STICK RUN646000 DRISSE D10.5 EN 353-2 OU CORDAGE 3T PA D12mm”. There is also an ‘up’ arrow. Performance in use: To attach and remove it from the rope requires a bolt to be screwed and unscrewed. This is a little fiddly but, as the device remains attached to the operative it cannot be dropped. The Stick Run has two different settings - it will 'stick' or 'run'. It runs freely on the rope, with a small brake wheel, in one position for descending, and will only move up the rope in the other, for ascending. Simply adding, or removing, a spring action from the cam achieves this change of action. Effectively this means the user can choose whether to have a fall arrest or a work-positioning device. However, as such it is a compromise and does not excel in either situation. When used with a lanyard the active 'run' position is a little too free on 10.5 mm rope, and relies mainly on the device's weight, meaning the device may take time to deploy in some situations. This could possibly be remedied by modifying the brake wheel. However, when used attached directly to the harness the free action is appreciated. When in the ‘Stick’ position it can easily be tensioned onto the back-up rope for safety or to aid positioning. It is very difficult to release when loaded. Note: - Since the tests, the Stick Run has been slightly redesigned with a smaller, completely smooth brake wheel, and an additional light spring in the cam. Test performance: The Komet Stick Run failed to hold the 4 kN minimum working strength test, slipping at approximately 3 kN. It passed the 12 kN hold test but was severely distorted. In the dynamic tests long slippage distances reflected the low slippage force. On two tests on Edelrid rope the device hit the buffer at the end of the test rig. On ten out of twelve tests the peak impact force was less than 3 kN. The two tests that exceeded this were on Marlow rope. Despite the higher impact forces, over 4 kN, slippage was comparable to the other tests, at approximately 1.75 metres. 44
Page 1 and 2: HSE Health & Safety Executive Indus
Page 3 and 4: © Crown copyright 2001 Application
Page 5 and 6: 8.6 PETZL “ABSORBICA”..........
Page 7 and 8: 1.2 AIMS, OBJECTIVES AND SCOPE 1.2.
Page 9 and 10: 1.4.3 Verification For the tests to
Page 12 and 13: 2.1 INTRODUCTION 2 ROPES Ropes are
Page 14 and 15: The ropes are all fundamentally of
Page 16 and 17: 3.1 INTRODUCTION 3 KNOTS Terminatio
Page 18 and 19: Unlike the double overhand and doub
Page 20 and 21: It is unique in that it can be easi
Page 22 and 23: On most of the tests with low-stret
Page 24 and 25: Strength kN 26 24 22 20 18 16 14 12
Page 26 and 27: 3.4.2 Bird droppings Sections of ro
Page 28 and 29: 4.1 INTRODUCTION 4 ANCHOR FORCES Th
Page 30 and 31: 4.4 WORK POSITIONING A combination
Page 32 and 33: 4.6 RIGGING The technician remained
Page 34 and 35: 5.1 INTRODUCTION 5 ROPE PROTECTORS
Page 36 and 37: 5.7 COMPRESSED AIR FLEXIBLE HOSE PI
Page 38: Another point to recognise is that
Page 41 and 42: The IRATA Guidelines state that the
Page 43 and 44: Devices certified to BS EN 567 10 (
Page 45 and 46: In practice this type of test is us
Page 47: • Minimum static strength (sectio
Page 51 and 52: 6.2.7 Petzl Rescucender Material: A
Page 53 and 54: 6.2.9 SSE Stop & Go Material: Alumi
Page 55 and 56: In the dynamic tests it did not per
Page 57 and 58: 6.2.13 Summary of test performances
Page 59 and 60: 6.3 TYPE B - ASCENDER DEVICES Figur
Page 61 and 62: 6.3.1 Camp Pilot Material: Aluminiu
Page 63 and 64: 6.3.3 Petzl Ascension Material: Alu
Page 65 and 66: 6.3.5 Kong Cam Clean Material: Alum
Page 67 and 68: 6.3.7 Summary At present, most of t
Page 69 and 70: 6.4.2 Tests All devices underwent f
Page 71 and 72: The following table summarises the
Page 73 and 74: 6.4.3 AML Material: Aluminium Weigh
Page 75 and 76: Performance in use: In use the devi
Page 77 and 78: Clockwise rotation of the handle tu
Page 79 and 80: Test performance: The static tests
Page 81 and 82: 6.4.8 Troll Allp Material: Aluminiu
Page 83 and 84: Secondly, the bolt can first be adj
Page 85 and 86: Material Dynamic rope Low stretch r
Page 88 and 89: 8.1 INTRODUCTION 8 LANYARDS (FALL A
Page 90 and 91: 8.3 BH SALA Length 2 m Principle Te
Page 92 and 93: 8.6 PETZL “ABSORBICA” Length 0.
Page 94: Description: The Spanset lanyard co
Page 97 and 98: 9.3 BACHMANN KNOT Figure 55 Bachman
Page 99 and 100:
9.5 FRENCH PRUSIK Figure 57 French
Page 101 and 102:
9.7 PRUSIK KNOT Figure 59 Prusik kn
Page 104 and 105:
11 FUTURE WORK This study has highl
Page 106 and 107:
12 APPENDICES 101
Page 108 and 109:
12.1 APPENDIX 1 PERSONNEL INVOLVED
Page 110 and 111:
12.2 APPENDIX 2 QUESTIONNAIRE - SUM
Page 112 and 113:
12.2.3 Hardware ratings Respondents
Page 114 and 115:
12.2.5 Rope Protectors Table 14 Que
Page 116 and 117:
12.3 APPENDIX 3 ROPE ABRASION Table
Page 118 and 119:
12.4 APPENDIX 4 TEST MACHINES, LOCA
Page 120 and 121:
12.4.4 Rope protectors cycling a lo
Page 122 and 123:
Method for minimum static strength
Page 124 and 125:
12.4.7 Lanyards • Static tests Te
Page 126 and 127:
12.5 APPENDIX 5 ABRASION TESTS: REC
Page 128 and 129:
I. Concrete edge, Lyon canvas prote
Page 130 and 131:
N. Steel edge, PVC “rope bag” (
Page 132 and 133:
T. Paving slab, roll module Start 1
Page 134 and 135:
12.6 APPENDIX 6 KNOTS - STRENGTH TE
Page 136 and 137:
Knot Table 21 Marlow 10.5mm rope (l
Page 138 and 139:
12.7 APPENDIX 7 LANYARDS - STATIC T
Page 140 and 141:
12.8 APPENDIX 8 TYPE A BACK-UP DEVI
Page 142 and 143:
12.9 APPENDIX 9 TYPE A BACK-UP DEVI
Page 144 and 145:
Device & rope type Rope brand SSE S
Page 146 and 147:
12.10 APPENDIX 10 TYPE A BACK-UP DE
Page 148 and 149:
12.11 APPENDIX 11 TYPE B DEVICES -
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
12.14 APPENDIX 14 TYPE C DEVICES- D
Page 156 and 157:
12.15 APPENDIX 15 TYPE C DEVICES -
Page 158 and 159:
12.16 APPENDIX 16 TYPE C DEVICES -
Page 160 and 161:
12.17 APPENDIX 17 LANYARD - DYNAMIC
Page 162 and 163:
12.18 APPENDIX 18 PRUSIK KNOTS Bach
Page 164 and 165:
French prusik Main rope Brand type
Page 166:
CRR 364 ISBN 0-7176-2091-3 £20.00
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