BS 7121-3:2017+A1:2019
$215.11
Code of practice for safe use of cranes – Mobile cranes
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 74 |
This part of BS 7121 provides recommendations for the safe use of mobile cranes (see 3.5) used for a wide variety of lifting operations in numerous locations, and is intended to be used in conjunction with BS 7121‑1, which gives general recommendations for all types of cranes, and BS 7121‑2 (all parts), which gives general guidance on inspection, testing and examination of all types of cranes.
NOTE Mobile cranes are manufactured in many different forms. Mobility is either by means of wheels or crawler tracks. Cranes can be fully mobile and able to travel with rated capacity loads suspended (pick and carry), or semi-mobile and not permitted to travel with suspended loads. Semi-mobile cranes include wheeled and crawler‑mounted cranes, fitted with stabilizers or outriggers; and cranes that, due to size and weight, are taken to the work site in parts and assembled at the site. Cranes that are assembled on site to work from a fixed base with outriggers are also covered by this part of BS 7121.
This part of BS 7121 is not applicable to rail-mounted cranes, cruciform self-erecting tower cranes, cranes covered by other parts of BS 7121, or to the use of cranes:
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for bungee jumping or similar entertainment activities; or
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specifically designed for railway applications; or
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as part of a fully automated storage or production system.
While the recommendations in BS 7121‑1 are for planning, management, selection of equipment and personnel, etc., for safe lifting with all types of cranes, this part provides specific recommendations for safety when dealing with the hazards caused by mobility and the diversity of locations for mobile crane lifting operations.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | Foreword |
| 9 | 1 Scope 2 Normative references |
| 10 | 3 Terms and definitions |
| 11 | Figure 1 — All-terrain crane Figure 2 — Crawler crane |
| 12 | Figure 3 — Low-headroom crane |
| 13 | Figure 4 — Mobile self-erecting tower crane |
| 14 | Figure 5 — Road-rail crane Figure 6 — Rough-terrain crane |
| 15 | Figure 7 — Spider crane |
| 16 | Figure 8 — Truck-mounted crane |
| 17 | Figure 9 — Yard crane 4 Management of installation and lifting operations 4.1 Safe system of work |
| 18 | 4.2 Control of the lifting operation |
| 19 | 4.3 Duties of the person appointed to control the lifting operation |
| 20 | Table 1 — Example load and environmental hazards associated with lifting operations |
| 21 | Figure 10 — Relationship between complexity index and lift category Table 2 — Illustration of the categorization of lifts based on environmental and load complexities |
| 24 | 5 Planning of the lifting operation 5.1 General |
| 25 | 5.2 Risk assessment 5.3 Method statement |
| 26 | 5.4 Team briefing/induction |
| 27 | 5.5 Selection of cranes 5.6 Siting of crane 5.7 Contracts |
| 28 | 6 Selection and duties of personnel other than the appointed person 7 Selection of cranes |
| 29 | 7.1 General |
| 30 | 7.2 Truck-mounted crane 7.3 Rough-terrain crane 7.4 All-terrain crane |
| 31 | 7.5 Yard crane 7.6 Low-headroom crane 7.7 Crawler crane 7.8 Spider cranes |
| 32 | 7.9 Jib configurations |
| 33 | 7.10 Main jib extensions 7.11 Special operations |
| 34 | 8 Siting of cranes 8.1 General 8.2 Crane standing or support conditions |
| 36 | Figure 11 — Packing for outriggers/stabilizers Figure 12 — Position of outrigger mat 8.3 Proximity hazards |
| 38 | Figure 13 — Minimum exclusion zone distances |
| 40 | 9 Safety 9.1 General 9.2 Modifications and materials 9.3 Identification of person directing crane movements 9.4 Personal protective equipment (PPE) and safety equipment |
| 41 | 9.5 Work at height 9.6 Access and egress (including emergency escape) 9.7 Fire extinguishers |
| 42 | 9.8 Limiting and indicating devices 9.9 Machinery guarding |
| 43 | 10 Crane documentation 10.1 Rated capacity charts 10.2 Instruction manuals 10.3 Reports of thorough examination/test certificates 10.4 Maintenance records 11 Rigging and de-rigging 11.1 Planning |
| 44 | 11.2 Manufacturer’s rigging and de-rigging instructions 11.3 Fly jibs 11.4 Identification of components 11.5 Electrical supply |
| 45 | 12 Procedures and precautions 12.1 Crane operation |
| 46 | 12.2 Rated capacity |
| 47 | Figure 14 — Control of pendulum swinging of load 12.3 Mode of operation and control |
| 48 | 12.4 Working on cranes 12.5 Reporting of defects and incidents 12.6 Leaving the crane unattended |
| 49 | 13 Pre-use checks, maintenance and inspection 14 Thorough examination, including testing 15 Multiple lifting and lowering 15.1 General |
| 50 | 15.2 Main factors to be considered when planning multiple lifting |
| 51 | 16 Weather conditions 16.1 General 16.2 Wind |
| 52 | 16.3 Visibility 16.4 Rain or snow/ice 16.5 Water condition 17 Out-of-service conditions 17.1 General 17.2 Thunderstorms 17.3 On-site travel |
| 53 | 17.4 Movement to site 18 Slinging and handling of loads |
| 54 | 19 Signalling systems 20 Special applications of cranes 20.1 General 20.2 Raising or lowering of personnel |
| 58 | 20.3 Grabbing and magnet crane services 20.4 Magnet service 20.5 Vacuum lifting devices 20.6 Demolition: balling operations 20.7 Dynamic compaction |
| 59 | Annex A (informative) Road-rail cranes Figure A.1 — Typical road-rail crane varieties |
| 60 | Annex B (informative) Contract lift or crane hire |
| 61 | Figure B.1 — Contract options Annex C (informative) Loads imposed on the ground by mobile cranes |
| 62 | Figure C.1 — Loadings on a mobile crane |
| 63 | Figure C.2 — Effect of load and position on outrigger loads |
| 64 | Figure C.3 — Effect of load and position on crawler track loads Annex D (normative) Piling operations |
| 66 | Annex E (normative) De-rigging operations |
| 67 | Annex F (normative) Non-recoverable lifts/loads Annex G (normative) Mobile cranes mounted on water-borne craft |
| 68 | Figure G.1 — Typical flat top modular pontoon |
| 69 | Figure G.2 — Typical ramp pontoon |
| 71 | Bibliography |
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