U-80 Cattle Guards w/o Clean Out (30 tons per axle)Powder River Cattle Guards are designed to meet H 15, H 20, U 54, and U 80 specifications. These different load rated cattle guards are used and recommended by state and federal agencies. Powder River cattle guards come in sizes up to 14 feet. If you don't see the size you need, these cattle guards can be installed end to end to meet your road width requirements. Make cleaning under the cattle guard easy with an optional three rail clean out section