Cotton Belt? Road Number SSW 71121 This 50? steel side, 14? panel, fixed end gondola with low cover car is painted box car red, has large, white ?Cotton Belt? lettering and runs on box car red roller bearing trucks. Built in August of 1957 by Bethlehem Steel, this car was last shopped September 1976. This car has a capacity of 139000 lbs., load limit of 140100 lbs., light weight of 79900 lbs. and is rated for 2044 cu. ft. capacity. Cotton Belt? is a registered trademark of the Union Pacific Railroad