I know it\'s completely random, but I have a purpose.Say the section is about 5 meters long and the bleachers are titanium.I\'ll love you if you help me out.Since the density of titanium is about 4500 kg/m^3 and the density of aluminum is about 2700 kg/m^3, a set of titanium bleachers will weigh 1.7 times more than a set of aluminum bleachers, given that they have the same geometry If you really want to know, would suggest that you find a style of bleachers that you like, which will probably be made out of aluminum, call the company and get the weight, and then multiply it by 1.7Just don\'t tell them why you need the weight, because they might laugh at you.Other related question