Manual chain hoist trolley or electric trolley
Manual chain hoist trolley or electric trolley
(OP)
For items which require infrequent maintenance, can manual trolley hoist be suitable for lifting weight of more than 3 ton? My concern is the pull force required for manual trolleys. For capacities more than 3 ton, the force required is more than 30kg (~15 pound).
With increased force, do maintenance personnel find it comfortable to use manual chain hoist? If pull force is high, it may lead to personnel injury or back pain. Your feedback considering field experiences/ OSHA guidelines is appreciated.
With increased force, do maintenance personnel find it comfortable to use manual chain hoist? If pull force is high, it may lead to personnel injury or back pain. Your feedback considering field experiences/ OSHA guidelines is appreciated.





RE: Manual chain hoist trolley or electric trolley
Check if it is union or not they may have contractual load lifting regulations.
And 60 lbs would be an issue in most work locations. Especially if the item to lift is bulky or awkward.
RE: Manual chain hoist trolley or electric trolley
RE: Manual chain hoist trolley or electric trolley
The Code ASME B30.16-2007 Overhead Hoist (Underhung) deals with this matter. At the same time, you could Google the Hoist Manufacturers Institute (HMI), which using as a guide that ASME Code, has prepared a couple of leaflets (FREE DOWNLOAD) with the list of SHALL’S and SHALL NOT’S for a good safety practice.
El que no puede andar, se sienta.
RE: Manual chain hoist trolley or electric trolley
RE: Manual chain hoist trolley or electric trolley
RE: Manual chain hoist trolley or electric trolley
RE: Manual chain hoist trolley or electric trolley
RE: Manual chain hoist trolley or electric trolley
I believe Cal-OSHA regulations normally limit the amount of weight a single person can lift un-aided from floor to chest height, to around 35lbs.
RE: Manual chain hoist trolley or electric trolley
RE: Manual chain hoist trolley or electric trolley
I have drawn infrequent-duty bridge cranes with a cathead and chain loop attached to a shaft between corresponding wheels on opposite trucks, for the purpose of driving the trucks, instead of pulling laterally on the hoist's chains, which is the remaining way to drive an unpowered bridge.
A brief search did not find any loose manually/chain powered trolleys, but did find several manually operated chain hoists equipped with manually chain driven trolleys, like this one:
http://www.grainger.com/product/HARRINGTON-Hoist-T...
Mike Halloran
Pembroke Pines, FL, USA
RE: Manual chain hoist trolley or electric trolley
The trolley hooks carry the load, the second chain moves the geared trolley down the overhead track. you need three other people to guide the tubesheet bundle into the heat exchanger, but they don't need to help the man moving the suspended load.
One millwright pulling a chainfall lifts and controls the load while rotating a 30,000 lbs CT cover assembly.
RE: Manual chain hoist trolley or electric trolley
As MikeHalloran mentioned my question is about lifting as well as moving the trolley along hoist beam with suspended load.
I see one exp. from racookpe1978 wherein a huge load can be moved by a single person lifting as well as moving horizontally.
OSHA puts some limitations on pull required as tbuelna mentions 35 lb load. In this case it is lifting till the chest.
Will lifting to certain height or pulling horizontally be worst case? I suppose lifting might require more effort.
In the catalogue below pull force is mentioned on Page 4 for different tonnage lifting. I suppose if one has to pull the weight up if he applies his body weight he can lift it up.
http://www.indef.com/pdf/Corporate%20Brochure.pdf
RE: Manual chain hoist trolley or electric trolley
I have actually used a 2-ton Yale trolley chain hoist attached to a mobile gantry A-frame, and I can say the chain pull force to move the geared trolley supporting a rated load along the gantry beam is far less than what the lift load required.
The reason we used a manual chain hoist was because we were using it to precisely position heavy components. The manual chain hoist provided much better feedback and control than an electric hoist would.