Mobile crane sizing.
Mobile crane sizing.
(OP)
Is there an effective utility for estimating the required size of a crane? I’m an estimator for a mechanical contractor, and it seems we never allow enough money for crane rental. And unfortunately, I don't have the time to call the rental company to give them specifics on each and every job I bid. How can I effectively adjust my estimates?





RE: Mobile crane sizing.
Larry
RE: Mobile crane sizing.
RE: Mobile crane sizing.
Check this out: http://www.snopes.com/photos/accident/crane.asp
RE: Mobile crane sizing.
RE: Mobile crane sizing.
As far as not having the time, if you can't do it yourself, make the time to utilize your contractors. What is it costing you if you a) continue to miss estimates on the low side and lose money on projects or b) start over estimating the cost and lose projects because you are not competitive.
Those are just my thoughts, hope it helps.
RE: Mobile crane sizing.
I've seen too many instances where cranes have caused delays and cost overruns due to very controllable factors. On the last large project that I was involved with the rental company had a representative at the morning project meeting at least twice a week. I never hear that we are waiting for the crane.
RE: Mobile crane sizing.
But I would say a good estimate for load calcs is 2.5x that heaviest thing you will see, ie. 5 ton chiller (weight), 13 ton crane, but i think they come is 5 and 10 ton increments.
Call your rental company and ask for a catalog. Also, do a search on google for crane sizing, I am sure there is something out there that would help in a pinch.