The gully is 10 feet across and about 8 feet deep. I figured on about 3 feet on each side for some type of footing that would not sink or move. The most weight on the bridge would be my Mahindra and a trailer I use to haul firewood. I have no good access to the back of my property otherwise. I'll skip the rails and seek another solution.
Has anyone had any dealings with this company?
All Terrain Bridge | ATV Bridge, Golfcart Bridge, Pedestrian Bridge, Small Bridge
A mobile home frame would work well for what little weight you are going to be moving across. It looks as if you are not going to be presenting much over a 3 or 4 ton load on the bridge. If its only 10 ft across and you have three 24' rails I would not worry about getting anything else and just build it. I have used good 15' railroad ties for bridges on the ranch crossing creeks that are 7' across and 4' deep with no problem. We run a Ford 4000 pulling a 20' trailer with hay across it all the time (8 - 10 tons gross) for the last 10 years. Just make sure you have a good base on each side for whatever is going to span the draw AND that the walls will not crumble out from under you. We have lots of 8-9' RR ties so we lay four of them parallel to the creek on each side for the foundation and lay the longer ties on top spanning the water.
bank H2O bank
l-l-l-l---------l-l-l-l l RR Tie
l-l-l-l---------l-l-l-l l -------- 15' RR Tie
We use two or three of the 15' ties and then place one or two layers of 2"x12"x8' rough planks (full 2" not planed) perpendicular to the 15' ties. We have never had a breakthrough. We do monitor the planks and ties though just to make sure. You could do the same using the rails instead of the 15' ties. You would have 5' or so on each side of the draw. I would drive my tractors across your bridge since its such a short span. Good Luck Dr. S