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This page was last edited on 7 September 2017, at 09:47. Does anyone know of a chart available on line for acceptable sizes of crane rails to be used with hoist trolleys. Best Of All, It’s Free! Eng-Tips’s functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Promoting, selling, recruiting, coursework and thesis posting is forbidden.
Specifically, I am looking for an acceptable beam to be used for a 10 ton hoist. I have sized the beam but am being questioned about the bending resistance of the bottom flange. The span is 9 feet with a 4 foot cantilever. Alternately, does anyone have a formula that would calculate the strength of the bottom flange in this situation? The other is the CMAA publication no. This could lead to a catastrophic failure. I am not trying to discourage you from using existing results, but rather pointing out the value in knowing where they came from.
I work for an industrial crane manufacturer and we have pre-calculated girders, but they only apply to our trolley designs. If another manufacturers trolley is used and the wheel geometry is different, the girder may not react the same even though the capacity of the trolleys is the same. I hope this is of some help to you. The Australian Crane Code AS1418 has a small appendix dealing with the design of monorail beams, including assessment of the minimum acceptable flange and web thicknesses.
PDF copies of all Aus Standards are downloadable at slightly less than the full hard-copy cost. A downloaded PDF of AS1418. I now have a copy of the CMAA 74 and the calculations appear straight forward although there is not much theory background. There is no formula mentioned to obtain this number. Is this simply the shear on the beam or is there another factor I should be using? It can be calculated using ordinary methods. I hope I was able to be helpful.