BS 7121-5 PDF

BS Code of practice for safe use of cranes. Tower cranes. standard by BSI Group, 04/28/ View all product details. Most Recent. Track It. Find the most up-to-date version of BS at Engineering BS BRITISH STANDARDCode of practice for safe use of .. BSI •9 BS Complex liftIf the lifting operation is.

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BS 起重机安全使用实施规则.塔式起重机 – MBA智库文档

Search the history of over billion web ns on the Internet. Tower cranes ICS Date Text affected Licensed Copy: A list of organizations represented on this committee can be obtained on request to its secretary. BS provides general recommendations for crane types not covered in an additional part of Vs BS covers in-service inspection, thorough examination and, where appropriate, testing for the safe use of all types of crane.

Subsequent parts of BS 7 1 2 1 deal with the specific crane types as follows: When all 7121–5 of BS have been published, CP will 71211-5 withdrawn and BS will be revised to cover manually operated and light cranes only. Information on the background to the development and use of BS 7 1 2 1 since the initial publication of BS in is given in Annex E. The BS series has been accepted as representing the consensus of practical experience for safety on cranes.

It is intended to be used in conjunction with other parts of BS to ensure, so far as is reasonably practicable, that lifting operations are carried out safely. This standard was drawn up with the participation of HSE representatives and will be referred to in relevant HSE publications.

Use of this document As a code of practice, this British Standard takes the form of guidance and recommendations. It should not be quoted as if it were a specification and particular care should be taken to ensure that claims of compliance are not misleading. Any user claiming compliance with this British Standard is expected to be able to justify any course of action that deviates from its recommendations.

It has been assumed in the preparation of this British Standard that the execution of its provisions will be entrusted to appropriately qualified and experienced people, for whose use it has been produced.

Presentational conventions The provisions in this standard are presented in roman i. Commentaryexplanation and general informative material is presented in smaller italic typeand does not constitute a normative element. Contractual and legal considerations This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations. Subjects covered include selection of tower cranes, planning the installation including site specific design work, e. It also covers the appropriate selection and training of personnel involved in the safe installation and use of tower cranes.

BS 7121-5:2006

NOTE Self-erecting tower cranes have been addressed briefly in this document. It is envisaged that a full treatment will be given in a future publication. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document including any amendments applies. BS all partsCode of practice for the safe use of cranes BS The competent person may require supplementary tests as part of thorough examination.

The same principles should be applied when the operations are carried out at a temporary site, for example construction, or when the crane is a permanent fixture, for example in a factory or at a dock. The safe system of work should include: Crane users have a duty to ensure that the crane is only used for its intended purpose. The safe system of work should be communicated to all parties concerned. It is essential for the safety of the operation to ensure that all personnel can communicate clearly in the same language.

Cranes are work equipment and it is essential that they are not used for the lifting of persons for entertainment purposes, including joyriding, bungee jumping and stunts.

BS 7121-2-5:2012

Details of the requirements for installation operations are given in Clause 12 and Clause The person appointed may have other duties and need not be an employee of the employing organization. The appointed person should have adequate training and experience to enable these duties to be carried out competently.

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On large construction sites where multiple lifting operations are carried out by various subcontractors, the principal contractor should appoint the appointed person for the site. Selection and assessment of appointed person When selecting an appointed person the employing organization should take into account the variety and complexity of the operation, as well as all the problems that could arise from proximity hazards and environmental courses.

The appointed person should be notified formally in writing of their appointment. The appointed person should be given authority to carry out the duties involved, including consulting others with specialist knowledge and experience, and should be able to delegate duties and tasks for any part of the safe system of work to suitably qualified individuals.

The employing organization should review and assess the performance of the appointed person periodically. Any corresponding instructions from the crane coordinator to the crane operators should be given via the respective signallers.

In such circumstances the signallers should obtain the agreement of the crane coordinator before carrying out any operation. This activity should be part of the initial planning process. This may include consultation with other responsible bodies if necessary and ensuring that, where different organizations are involved, they collaborate as necessary. For further information see BS The appointed person should be given the necessary authority for the performance of all these duties and, in particular, authority to stop the operation whenever they consider that danger is likely to arise if the operation were to continue.

Duties, but not responsibilities, may be delegated to another person where considered appropriate. NOTE As the crane operator is required to be at the controls of the crane when it is handling loadsit would not be appropriate to appoint the operator to be in control of the lifting operation.

For a basic lifting operationthe management of the employing organization may consider it appropriate to appoint the stinger to be in control of the lifting operation.

The duties for a basic lift are considerably fewer and less demanding than for a lift at a hazardous location. An appointed person employed for a basic lift might not be suitably trained or experienced for a more complicated operation, and another appointment could be required for this.

The information given in 4.

The requirement for an appointed person with appropriate training and experience also applies to installation operations. Bw can be by a reliable source of information, weighing the load, or calculation with allowance 7121- possible inaccuracies. NOTE If cranes are used to lift loads from waterthe load could also include forces due to water flow or suction and the effect of loss of buoyancy.

The rated capacity of the crane should be specified by the manufacturer in the information for use supplied with the crane, or else on the current report of thorough examination issued by the competent person. Manufacturer’s sales leaflets should not be relied on for the rated capacity for a specific crane. Lifting operations involving self-erecting tower cranes should take into account the recommendations given in Annex A. Consideration should also be given to the wind area of the load to ensure that its movement in the wind does not present a hazard.

All persons involved in the lifting operation should be instructed to seek advice from the appointed person if any change is required to the lifting operation, or if any doubts about safety arise. The appointed person and crane supervisor should be aware of the limits of their knowledge and experience concerning lifting operations, and when conditions exceed these limits, further advice should be sought. NOTE Hazards can be from surrounding buildingsor overground or underground services.

NOTE Additional risks can arise from the crane driver not being able to observe the load while taking the initial strainand movements due to deflections as the load is lifted clear of the supporting structuremaking it not possible to put the load back down.

This should lead to arranging 7121–5 appropriate action to minimize any adverse effects, and to giving 71215 notice to all persons concerned. Tower cranes should not be used for multiple lifts. Lifting operations are commonly carried out using cranes and they should be included in the Health and Safety Plan required by the CDM [6] so that factors influencing crane safety can be assessed at a sufficiently early stage.

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When constructing the Plan, the ways in which the cranes are intended to be used, i.

The Plan should include information to allow all parties involved in the specification, installation or use of cranes to be made aware of the fundamental criteria 7121-55 planning issues needed to ensure that lifting operations are initiated and proceed in a logical and safe manner.

Designers should obtain and make available to the CDM planning supervisor, information relating to the site and type s of crane to be used.

NOTE Contractors have a duty to operate cranes safely, and this can be made extremely difficult by thoughtless design which puts pressure on them to use cranes at their operating limits and sometimes encourages improper use. In general, any organization requiring a load to be moved by crane, which does not have its own craneage, has two basic options: The difference between the two options is summarized in Figure 1.

If an individual or organization does not have expertise in lifting operations they should not hire cranes but should opt for a contract lift. Before entering into a contract, employing organizations should satisfy themselves that the contractor has the necessary competence to carry out the work.

NOTE Responsibilities for insurance in terms of the cranepersonnel, the load and third parties might also need to be clarified. The parties to the contract should ensure that: The contractor should carry out lifting operations in accordance with the BS 1 series. NOTE Although the BS series is intended to assist organizations to comply with their statutory and common law obligations, it does not relieve them from these obligations.

B supplying the The crane owner has a duty to: The user organization retains the responsibility for nominating the appointed person in accordance with 4. Notwithstanding any advice the crane owner might have offered concerning the selection of a particular crane or any other relevant matter, bx example clearances, ground conditions, the responsibility for ensuring that the crane is of a suitable type, size and capacity for the task being undertaken and for planning the operation remains with the user organization.

Therefore if an individual or organization does not have expertise in lifting operations, they should not hire cranes but should opt for a contract lift. Planning should be carried out by an appointed person who has the appropriate knowledge for the bw being undertaken see 4. In hs of repetitive or routine basic lifting operations, this planning might 71121-5 be necessary in the first instance, with periodic reviews to ensure that no factors have changed.

For lifting operations carried out on construction projects, further information on the duties of personnel is given in 4. Planning of the lifting operation should take into account: The assessment should evaluate the risks 71121-5 and the nature and extent of any measures required to mitigate those risks. The appointed person should also take into consideration hazards identified by the overall site risk assessments. The results of the risk assessment should be recorded in writing and used in the b of the method statement see 6.

Arrangements for effective communication among the team and if necessary with adjacent crane operators in case of be should be available. NOTE The appointed person may delegate the task of preparing the method statement to another person; however they retain responsibility for the method statement. Records of training and experience of persons such as the crane operator assist in the selection of suitable personnel.

Crane operators and slingers should be trained in accordance with the recommendations given in Annex C. Those responsible for the selection of personnel should bx that 7121-55 personnel involved in the operation are efficiently organized in order to ensure good team-work in the working situation. Work 71211-5 with lifting operations should not be carried out by personnel whose efficiency is impaired by alcohol, drugs or other influences. It is essential that all personnel in the 1721-5 are made aware of both this fact and their other duties bz 7.

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