how can i build a wooden rack to hold dumb bells off my bedroom floor? Answered

http://www.angelfire.com/ny5/shenandoah/Grunt/Isotonic.html

has some pics at the end. I guess you would want to account for all the dumbells you have and may want to get and the weight. Use thick wood stock and hardwood like oak or structural fir, cabinet grade plywood. Good luck.