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Posted By Raiz Beig
Is there any hoisting/lowering speed stipulation for using man lift baskets using crane? Where shall one hook his safety harness while on basket – on crane hook or on basket?
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Posted By Frank Hallett
Intereresting Q!
Just remember that it isn't a fair-ground ride and that any man-riding attachment for use with a crane is inherently unstable [weather, sideways movement, traversing along jib or boom, etc] and must be properly secured to the crane hook or other securing device.
Whever possible, occupants should not be in the "bucket" except for essential movement.
Occupants must be contained and restrained whilst in the "bucket". The actual securing point for the occupants should be selected and designed to ensure that they cannot be flipped over the side of the "bucket".
Frank Hallett
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Posted By steven bentham
In order to get a more helpful answer you may wish to post more details of the work undertaken:
I have seen manlift baskets being used to lower a person down the side of a harbour to undertake maintenance work, with the worker restraint harnesses to the basket.
I have also seen a demolition worker harness with an enertia line to the crane hook above him to enable him to get out of the basket onto the roof to recover slates. The basket in this case was pushed up to the roofline for edge protection and the worker works 'uphill' of this.
Whilst both areas of work sound very dodgy they actually work practically for very short duration work. I would agree with the last comment as well, its not a fair ground ride and needs very carefull assessment and instructions.
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Posted By Dr. D. D. Radadiya
There is no such stipulated speed limit but always use slow speed and with guy ropes to control side movement of basket.
The safety belt should be anchored to crane hook.
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Posted By Raiz Beig
Reference my question, we use a 3.5 m long, counter weighted man basket which has got its crane hooking slings at 1 m from one end. 6 to 8 people can work on it at a time. Now attaching the safety belt on to the crane hook would be extremely difficult for these employees or even to a single person working at the other end. The purpose of the counterweighted manlift is itself to allow maximum access to remote working areas at height. Your comments please.
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Posted By Dr. D. D. Radadiya
If you have any good structure then safety belt can be secured with structure. You can make a railing and attach to the railing so that the hook of the safety belt can slide easily according to the horizontal movement. The basic purpose is to secure persons by any means if the man baskets fails to support i.e. failure of lifting taackles that is why the crane hook is prefrered. But its not possible to secure safety belt with crane hook then secure it with any suitable structure which can take that load and in case of crane failure and man basket failure it acts as fall protection.
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Posted By George Wedgwood
The harness is to prevent a fall of a person reaching out of the basket (common) to access a workpiece or awkward position. It should not be fixed to a crane hook as that would not be an 'approved' fixing point for a harness carabiner. Baskets should have an approved and inspected fixing point for harnesses and also the basket safety devices should be inspected by a competent person (engineering inspection company) to ensure that the complete assembly is safe and would remain secure even in the event of a bump or fouling on an obstacle - i.e. the safety bolts, pins or locks, hook clips etc. are in good condition. If the basket falls, then the chance of an injury is high, whether a person is roped to a crane hook or stays in the basket - the whole point being that the basket stays on the lifting device! Make sure your people inspect before use against a checklist and that it is signed of as safe for use, have a risk assessment for its use and a safe working procedure for the relevant task. Sounds a lot? Well try explaining in court if you have not!
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Posted By Dr. D. D. Radadiya
One should note that the crane is not desiged for human lifting at all. However, if you use crane for man basket then the follwoing must be ensured:
1, Inspection of crane by a competent person/ third party ispection and testing.
2. Inspection of man basket by a competent person,
3. Ispection of all slings and attachments.
4. Competency test certificate of crane operator,
5. Radio communication between crane operator, rigger and worker working in the basket must be established.
6. The task must be closely supervised.
7. Task Risk Assessment of the Job
Pl. note that the persons from the baskets are not supposed to lean or protrude any thing at any time. The basket should be positioned in such a way that serves the purpose platform for the work.
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