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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Grillages are generally designed specifically for each location. When a tower bw is erected using components from two or more manufacturers, it is essential that the written agreement of at least one of the manufacturers, where they remain available, is obtained before erection starts.

BS 7121-5:2006

The return welding current lead should be secured to the welded part, as close as practicable to the point of the weld. BSI also holds the copyright, in bz UK, of the publications of the 7211-5 standardization bodies. Where personnel are under training, they should be supervised by appropriate personnel. This means that the instructors and trainees together with the crane and loads should, during the basic training, be wholly devoted to that training. This clause deals with the matters that need to be taken into account in addition to those in Clause 12 when climbing is being undertaken.

The guide wheels or rollers may bear on either the 71215 or faces of the tower section corner posts. It is also important that only components specified by the manufacturer are used in the climbing process.

The working speed of the carrier should be limited to a maximum of 0. The crane safety devices should not be regarded as routine 1721-5 of stopping the motion s.

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

When lifting a load from a stack, all persons should be instructed to stand away from the stack in case adjacent materials or objects are displaced. If the weight is marked, check in the same way as in item a to ensure it includes all parts of the load. Health and Safety at Work etc. NOTE Further information on selectionuse and maintenance of personal fall protection systems and equipment is given 7121- BS If, during the lifting operation, responsibility for directing the crane and load is to be transferred to another nominated person, the slinger should clearly indicate to the crane operator that this responsibility is being transferred and to whom, and the slinger should clearly indicate to the new nominated person that this transfer is taking place.

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In this case they should be treated as mobile cranes for thorough examination in accordance with BS The procedure should include provision for an examination by a competent person after any incident, whether or not a repair is bw, to ensure that the crane is fit for further service.

Bss 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. The assistance of the manufacturer or design authority should be sought to determine the vulnerable parts of the structure. 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.

In order that this responsibility can be effectively discharged, the appointed person see 4. Rail stops should not be taken into account when calculating the stability of the machine.

BS 起重机安全使用实施规则.塔式起重机 – MBA智库文档

71215- The thorough examination of tower cranes involves work at height in areas without full edge protection. The briefing should take place on site before the start of the installation operation and should be given by either the appointed person, if they are on site, or the erection supervisor. The procedure should include provision for an examination by a competent person after any incident, whether or not a repair is necessary, to ensure that the crane is fit for further service.

On some designs of climbing frame the cylinder s has sufficient stroke to lift the crane superstructure the distance required to insert a new tower section. This procedure should include the immediate notification of the following: It is essential the operator does not tamper with any controls, mechanisms or 71215- including limiting and indicating devices, either to enable the crane to function outside the operational range or loads specified by the crane manufacturer or other competent person, or to attempt to correct any suspected defect.

BS has been updated by experts to bring it up to date with technological developments The BS series is 712-15 being fully revised to meet industry best practice and to reflect changes in the application of risk-based planning to lifting operations. Where possible lifting of loads over highways, railways, rivers or other places to which the public have access should be avoided. Further details are contained in Cranes and planes -A guide to procedures for operation of cranes in vicinity of aerodromes [17].

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Fatigue damage and corrosion are also likely to be present on older tower cranes, which might require more detailed examination and testing as described previously. If in doubt, seek advice. In such circumstances the signallers should obtain the agreement of the crane coordinator before carrying out any operation.

In general crane operators should be at least 18, although younger people might be sufficiently mature to be trained. During the carrying out of the lifting operation, hand signals and any voice instruction to the crane operator s should only be given by one person at a time.

It is strongly recommended that all users of carriers wear suitable full body harnesses with work restraint systems attached to a suitable anchorage point in the carrier.

The nature and extent of this training depends on the complexity of the new equipment and the degree of difference from the equipment with which they are familiar. Records A full record of all use and maintenance, including checks and inspections, should be kept to 1721-5 that a full history of the equipment is available.

Subject the pins to NDT examination. Refresher training might be appropriate. Crawler mounted cranes without self-levelling should not be moved over uneven ground when erected.

7211-5 requirement for an appointed person with appropriate training and experience also applies to installation operations. Personnel should only stand on or work from the floor of the carrier. If the climbing programme is of several days duration, daily forecasts should be obtained to ensure that the crane can be secured in a suitable configuration if high winds are indicated.

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. In no case should the protection be used as an earth conductor.