Industry Patents

The disclosure relates to "leg carriage" type trusses, which rely for shipping on elevation by a pair of U-shaped wheeled temporary supports, each having two legs connected by a low horizontal member. The upper ends of the legs are inserted in receiving sleeves installed in the four corners of the truss structure. The clearance between the outer dimensions of the leg and the inner dimensions of the sleeve impact the ease with which legs can be inserted and removed, as well as the lateral "play" in the connection between the leg and truss, which impacts its stability in handling and therefore safety. The disclosure addresses the previous conflict between the two objects by the use of asymmetrical clearances. A relatively relaxed tolerance in the elongated axis of the truss eases insertion and removal. A lesser relative tolerance across the axis of the truss width has no significant impact on leg insertion and removal yet improves stability.