OK, so I had a 10x12 shed installed yesterday. The position looked OK and I signed-off on the installation and placement. Upon further inspection, I can see that it's not quite square with the gravel platform frame or the surrounding walls. It's off by less than in inch, but this will affect the ramp and anything else in the backyard related to the shed alignment. I don't want to call the shed company to ask them, as I already signed off on it and anyway they would say it's "close enough". I tend to be picky about such things, so I'd like to square it up if I can. So, I'd like to nudge one side over a bit to square it up. Got any simple ways to do this? It's on two large skids that set on gravel base. The gravel is packed, very flat and level, and the shed hasn't settled into the gravel, so I should be able to rotate it a tiny bit. One idea I had was to to use a tow strap attached to the tow hook on my car and use a come-along to pull the shed over. I'd just set the parking brake on the car and ratchet the come-along until the shed moves. I'd use a 8000lb strap and come-along to be safe. Does anyone know how much a typical wooden 10x12 shed weighs? It's empty.

OK, my shed is in place now I need a ramp to the door. The rise is about 15" so how long should I make the ramp?