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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When a tower crane is to be left unattended for even a short period, it is essential that the following precautions are carried out. Training of crane operators and slingers General Gs employment of competent, trained operators and slingers is one of the important factors in the safe use of cranes. In the bx of a lightning strike the crane should be thoroughly examined before being returned to service, to ensure that damage has not occurred to the crane or any of its components including the slew ring, safety and control systems.
Use of the guidance given in this standard can help protect safety of crane operators and can also be taken as an indication of good practice on site.
A list of organizations represented on this committee can be obtained on request to its secretary. When all parts of BS have been published, CP will be withdrawn and BS will be revised to cover manually operated and light cranes only. All personnel involved in the signalling should be given a clear and unique call sign and all communications should be preceded by this call sign. 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.
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.
The legs are triangulated to minimize twisting of the tower and are pin jointed to the tower and structure to eliminate bending from the leg members. Individual cranes can comprise almost any combination of the features shown in Figure 4, Figure 5 and Figure 6.
NOTE It might be necessary to refer to these in the event of a change of construction in the course of the contract requiring alterations to be made to the crane. Therefore a more frequent inspection should be carried out that takes account of the frequency of use of the crane and the environmental conditions. If in doubt, seek advice. These basic skills should include the following. For tower crane installation operations generic risk assessments are unlikely to be sufficient as every site and installation operation has hazards that are unique to that situation and should be taken into account in the assessment.
Training enables suitable employees to learn the basic elements of crane driving and slinging which, with experience, help them to become competent. These can provide an assessment of skill, an opportunity for limited instruction in weak areas and a practical test of competence.
bw Work at Height Regulations 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. NOTE Personal carrying cages attached to the trolley may provide suitable alternative safe access along the jib.
Lanyards should be connected to a suitable anchor point at all times and where lifelines are provided, a suitable device should be used in conjunction with the lanyard to permit full passage along the jib without detachment.
Upon completion of the work, the person who has been responsible for the work should sign the clearance section of the form or certificate certifying that all personnel have been withdrawn, that all gear, tools and loose materials have been removed, that all guards have been replaced and that all safety devices are operating.
These end stops should be shock absorbing or sprung, and should be moved hard against the 7121-55 chassis if the machine is to be used in a static position for any period of 7121-55. Only ballast blocks having markings showing their correct weight should be used.
These arrangements should include the bz of ground conditions, preparation of suitable outrigger foundations and any road closures. Overhead lines usually belong to the local electricity supplier or the National Grid company.
Unless specified otherwise this limiting wind speed should be taken as the maximum gust speed. All those attending the briefing should be asked to sign a declaration confirming that they have attended and understood the briefing. Limit switches should be checked for correct operation each day before personnel carrying operations are carried out. Machines which can be converted to be used as cranes e.
Once the inner tower has been extended additional tower sections, in halves, are lifted up and bolted together around the inner tower. At each stage the instructor should explain and demonstrate the operation and trainees should then practice it under supervision.
These devices are a useful aid to the operator when operating on multi crane sites but should not be relied on exclusively in place of the primary safe system of work including the crane coordinator, operator vigilance and crane to crane communication using anti-collision radios see For dated references, only the edition cited applies.
If this is not possible, permission should be obtained from the appropriate authority and the area kept clear of traffic and persons. If a crane has been subjected to such usage, consideration should be given to the use of non-destructive testing to detect possible fatigue cracking.
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. Grillages are generally designed specifically for each location.
Before lifting a load, the hoist line should be plumb. Fixed 71211-5 jibs are usually only available on small tower cranes self-erectors and similarand it is generally desirable to be able to travel the crane in order to move the load.