2000 Posts and climbing!!!
Join Date: Dec 2005
Re: Strength of Materials - 2x8 PT Lumber
Thinking on what was said, I think I overstated my load. If the tractor plus me is 1000 pounds, the truth is the tractor wheel-base (a Sears GT) is about 4 or 5 feet, so as the rear wheels are starting to come onto the plank, the front wheels are just at the top or just moving onto the shed floor. So, I doubt that the two planks are ever subjected to more than a total of 500 pounds, 250 pounds each. I am not really worried about these breaking they have held up well for many trips. The question really came to mind, given my experience with my tractor/shed planks, would I not be able to get away with using a 2x8 plank between two ladders, say, as a scaffold, to do some house painting from. I now think it is not strong enough, not if the plank is supported at 4 or 5 foot spacing.