Afternoon everyone, I just found this awesome site where I thought I could enlist the help of a lot smarter people than myself with my project. I want to build a garage elevator to raise and lower various articles from my storage loft. My loft has 9' floor with a 15' ceiling. I was going to reinforce two of the 2x6 studded walls with another 2x6. Then I was going to attach a 3"x3"x 14'6" long tube to these two studs which are 48" apart. These two 3"x3" pieces of box tubing would rest on a plate anchored to the concrete floor and then run up through the loft floor with additional bracing bolted to the loft floor's surface. I may not be explaining this well so I made a quick sketch and will try to include if I can figure out how. The loft is 18'x18' and was calculated to carry about 9K pounds after we deducted the weight of the loft itself. Sorry it took so long to get here. but my question is would 1/8" or 3/16" wall thickness for the 3"x3" frame tubing be the best choice? I do has some heavy items, 400 to 600 pounds to go up but I am not sure if 1/8" wall is heavy enough. Any thoughts or suggestions to wall thickness or loft design?