Ok I have a block building behind my house that used to be a dog kennel. It has a double sliding door in the back that I am going to take out and put some swinging doors. The bottom of the door is about 3ft off the ground and I need to build a ramp for pulling in the mowers and 4 wheeler. I have a lot of railroad crossties that were given to me. I need to figure out how to make a ramp out of them since they were free. Any advice would help Thanks.