Common use of Heavy Loading Clause in Contracts

Heavy Loading. A horizontal wind pressure at right angles to the direction of the line of 4 lb./sq. ft. upon the projected area of the cylindrical surfaces of all supported conductors and cables, together with their supporting suspension strand when covered with a layer of ice 1/2-in. in radial thickness and on surfaces of poles without ice covering. For supporting structures, other than unguyed poles at crossings over major tracks, carrying more than 10 wires, not including cables supported by suspension strand, the transverse load due to the open wires should be calculated on two-thirds of the total number of such wires, with a minimum of 10 wires. -15- Association of American Railroads Communication Manual 1989 Part 1-B-1 - ------------------------------------------------------------------------------

Heavy Loading. A horizontal wind pressure at right angles to the direction of the line of 4 lb./sq. ft. upon the projected area of the cylindrical surfaces of all supported conductors and cables, together with their supporting suspension strand when covered with a layer of ice 1/2-in. in radial thickness and on surfaces of poles without ice covering. For supporting structures, other than unguyed poles at crossings over major tracks, carrying more than 10 wires, not including cables supported by suspension strand, the transverse load due to the open wires should be calculated on two-thirds of the total number of such wires, with a minimum of 10 wires. -15- Association of American Railroads Communication Manual 1989 Part 1-B-1 - --------------------------------------------------------------------------------------------------------------------------------------------------------------