gross weight and a class 2 lever?
gross weight and a class 2 lever?
(OP)
I have a large piece of equipment that requires two over-head cranes to lift. The overall size not the weight requires a crane at each end. I want to know the gross weight for trucking. I have one digital crane scale. If one end is crane/scale lifted just off the floor while the other end is the fulcrum point and then repeated at the other end would not the combined scale weights equal the total weight? Is this a class two lever?
Wes
Wes





RE: gross weight and a class 2 lever?
Go rent(buy) another scale to be sure
RE: gross weight and a class 2 lever?
Your method will work as long as the object remains level when you switch ends with the load cell.
Timelord
RE: gross weight and a class 2 lever?
If the weights at each end are different, you have the means to work out the centre of gravity. The total weight is still valid is it not?
This is all assuming the thing remains approximately level, of course.
JHG
RE: gross weight and a class 2 lever?
Think of a simple beam with self weight supported at each end. If it is approximately level, the reaction at one end of the simple beam could be the floor, while the other would be your crane/scale. If you switch ends, clearly the total of the two loads you measured would equal the weight of the beam. However, if you switch ends, and some other part of the beam hits the floor other than the point you first lifted, you cannot add the loads together to get the total weight.
If you "heard" it on the internet, it's guilty until proven innocent. - DCS
RE: gross weight and a class 2 lever?
Don
Kansas City
RE: gross weight and a class 2 lever?
Wes
RE: gross weight and a class 2 lever?
An excellent point, although it depends on how you attach the crane. The worst case is that you will have to test three points. The weight and centre of gravity is still calculatable.
JHG
RE: gross weight and a class 2 lever?
If you take a four-legged table and put the two legs at one end on a scale, then put the other two on a scale, the weight of the table is the sum of the two readings, regardless of the location of the c.g. This is freshman statics, guys.
Don
Kansas City
RE: gross weight and a class 2 lever?
That is what I have done in the past. You can also come up with the CG. It wil be close as long as the angle is not no much.
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
RE: gross weight and a class 2 lever?
If you "heard" it on the internet, it's guilty until proven innocent. - DCS
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