How to model?

What is the best starting point for drawing an overhead crane and stress analysis computation of all members (Solidworks 2014), ISO working drawing (Autocad) of:Bridge detailEnd carriage detail Wheel mountingssembly drawing (bridge, end carriage, hoist)

Reference:
https://imgur.com/DkMHZDU
https://www.americancrane.com/resource-center/drawings/american-crane/top-running-single-girder-crane-with-fixed-axle-wheels

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These overhead cranes are almost certainly made of stock beam profiles which have been welded together.
The dwg files are of limited use, as they really just show the overall dimensions and layout. They are not production drawings.
In addition to the dwg files, search online and find good, large photos of the crane.

It may be a waste of time to learn the best ways to use profiles and weldments in SolidWorks. I think in this case, it may be enough to simply build an assembly from the profiles as you would for a normal product.
If you plan to make a lot of cranes in the future, look into the weldment tools, as it could make things go faster.

 
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