Product Code:SAE ARP581 Title:Universal Horizontal Field Maintenance Stand for 10,000 Pound Weight Class Propulsion Units (48 Inch and 30 Inch Rail Gage) Issuing Committee:Age-2d Packaging, Handling And Transportability Committee Scope:This recommended practice covers a rail concept stand that may be used for horizontal disassembly and reassembly, and maintenance, incorporating certain design features which are defined herein. These features include the rail dimensions and width, length and height of stand to insure compatibility with rail concept type transport and positioning trailers.