the structure is a rectangular frame with two cross bars the frame consists of 6 by 2 1/2 -inch (150 by 65-mm) angles bent from 1/2-inch (13mm) -thick plate the cross are 6 by 7/16-inch (150 by 11-mm) flats the length of the structure is 6 feet (1.8 m) equal to the height of a person the weight is 325 pounds (147 kg) in comparison the fixture as shown in fig 20-38 weighs empty 428 pounds (194 kg) with the exception of the four short welds across the narrow angle flanges all welds are 90 degree corner welds and they are parallel therefore the fixture is designed to be