Hi - I'd just like to reiterate that having a lower cart has a distinct advantage if you're working with heavy beams. A feature of this type of cart is that you can load it by parking the cart next to the beam you want to move then raising only one end and then lowering it onto the cart. This means you only have to lift 1/2 the weight of the beam. If you have a 2' high cart, you have to raise the end 4' off the ground. If it's 18" high, you only have to raise the end 3' off the ground. I will take a couple of pics of my present cart and e-mail them to you directly. Perhaps if you e-mail Ed Levin, he would send you a pic or a plan of his cart which uses bicycle-type wheels. Good luck with your project. jekbear