I am looking for a pre-made assembly like used on a radial arm saw.
I need a device that can raise and lower a small table 12-18" in a verticle direction. The table would be about 24 inches square, and have a total weight of 150 lbs. I would like it to be operated by a hand crank. The best...
Background:
Hobby welder trying to design a utility trailer, no engineering background.
Problem:
I'm trying to determine if a 3" steel (A36) "C" channel (4.1 lbs/ft) can support a 1500 lb. point load at the center of a 78" span. Here are my calculations:
Shear force = 750...
