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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A basic training course is usually designed with the requirements of novice operators in mind but it would be unwise to assume that more experienced employees do 721-5 need basic training.

Customers who bought this product also bought BS Defect reporting The erection supervisor in charge of each climbing operation should report any defects in the equipment to his manager so that the defects can be rectified before the next use of the equipment.

Where possible lifting of loads over highways, railways, rivers or other places to which the public have access should be avoided. 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. Any changes to the method statement following its initial issue should be recorded by a revision to the document and the document reissued.

These enable the Appointed Person and the Erection Supervisor to decide if the operation may proceed. When operators or slingers are recruited it is essential that employers check that their qualifications and experience relate to the job they are to do. All distances should be measured at ground level from a position estimated by eye to be vertically below the outermost conductor at a tower or pole position and should include an allowance for the load. Documentation Rated capacity charts Readily understandable rated capacity charts applicable to the various specified operating conditions of the crane should be prominently displayed to the operator.

Maintenance intervals and procedures Maintenance of both internal and external climbing equipment, including the servicing of hydraulic systems, should be carried out at the intervals and to the procedures prescribed by the manufacturer. A basic training course is usually designed with the requirements of novice operators in mind but it would be unwise to assume that more experienced employees do not need basic training.

It is recommended that access to tower cranes is prohibited for personnel whose presence is not essential, wherever possible. The design of grillages and their connections to the supporting structure should be carried out by a competent engineer.

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Overhead lines usually belong to the local electricity supplier or the National Grid company. The employer should ensure that if another organization carries out the training it is made aware of the sort of work which the trainee is likely to be doing.

Procedures for the monitoring and reporting of defects such as vibration during the climbing process should also be documented. These should have their indicators located in clear view of the crane operator.

BS – Code of practice for safe use of cranes. Tower cranes (British Standard)

If the ba is marked, check in the same way as in item a to ensure it includes all parts of the load. During the installation operation the wind gs should be periodically monitored using a calibrated handheld anemometer. Standards are also available from the BSI website at http: BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards.

Except as permitted under the Copyright, Designs and Patents Act no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means — electronic, photocopying, recording or otherwise — without prior written permission from BSI.

BS 起重机安全使用实施规则.塔式起重机 – MBA智库文档

This should lead to arranging for appropriate action to minimize any adverse 71215, and to giving appropriate notice to all persons concerned. A suitable allowance needs to be made for deflection when calculating the clearance between adjacent cranes see 4. For further information see BS Limit switches should be provided to prevent over-hoisting, over-lowering or over-derricking.

The vertical and horizontal forces are unlikely to be uniformly distributed and an allowance should therefore be made for these and 1721-5 any other unpredictable effects.

NOTE The operator 71211-5 the information from the anemometer in making a judgement of safe operating windspeed depending on the size and nature of the load being lifted. The crane safety devices should not be regarded as routine means of stopping the motion s. 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.

NOTEIf cranes are used to lift loads from water, the load could also include forces due to water flow or suction and the effect of loss of buoyancy. The stability of the carrier should not be affected by the operation.

bss External climbing When carrying out external climbing, the most common method of increasing the height of a tower crane is by the use of a climbing frame.

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The system requires a specifically designed form or certificate to be issued only when the safety precautions necessary to achieve the safe system of work have been taken.

BS 7121-2-5:2012

It gives recommendations for the pre-use checks, in-service inspection, maintenance and supplementary testing of tower cranes. It is essential that the appointed person carrying out the gs assessment has sufficient detailed knowledge of the specific crane and specific climbing equipment to be used in order to identify hazards. Subject the pins to NDT examination. Consultation between the designers of the structure and the person planning the climbing operation should take place at the earliest opportunity as substantial shoring and bracing could be required to safely transfer the collar forces to the structure.

Use of this b a code of practice, this British Standard takes the form of 711-5 and recommendations. Careful selection of employees before training starts helps to ba that resources are not wasted. Health and Safety at Work etc. Advice on health assessment is given in HS G 6 [10]. These enable the Appointed Person and the Erection Supervisor to decide if climbing should go ahead. Personnel should only stand on or work from the floor of the carrier. Training enables suitable employees to learn the basic elements of crane driving and slinging which, with experience, help them to become competent.

Climbing frames are generally provided with personnel platforms located at the bx and bottom of the frame to provide safe access for the erection team, with connecting ladders between the platforms.

Where the base design limits the free standing height of the crane, the maximum permitted free standing height should be marked at the base of the crane and entered into the documentation. Additional care should be taken if the carrier is of a length that could lead to excessive tilting through movement of persons or tools within the carrier.

Contractual and legal considerations This publication does not purport to include all the necessary provisions of a contract.

The crane operator and signaller should only be responsible for operating one crane or directing one carrier;c machines should not operate simultaneously in the same place if there could be a risk of collision;d all movements should proceed gently and not exceed 0.