The base is the design decision
Nine blocks joined by a connected six-runner grid, three runners in each direction rather than three bars in one. That gives a continuous bearing surface across the underside both ways, which is what lets it run on a conveyor in either orientation instead of only along its stringers.
It takes 11,023 lb static and 2,756 lb dynamic at a net weight of 31.97 lb, so it holds five tonnes standing while staying light enough for one person to move by hand.








