I have some light weight ramps made to load 4 wheelers etc. They are made from 1" square aluminum tubing. I am wondering if I filled the tubes with same if it would make them stronger and if so how much? Reason I ask is I've heard you could fill copper tube with sand and bend without kinking it. Well onetime I needed to bend some and no tube benders where I was. Light bulb came on remembering this. I filled the copper tubing with sand and I couldn't bend it by hand. Had to put in vice and use box end wrench for leverage to bend. If it will work on these ramps like that copper tubing it would make them a lot stronger.