Patent ID: 7677511

Claim:
A load-bearing framework comprising: a plurality of legs coupled to each other, the legs being positionable on a support surface, a first one of the legs extending along a first axis, the first leg having a first end; at least one tube coupled to the first end of the first leg, the tube extending along a second axis, the second axis intersecting with the first axis; a cap coupled to the at least one tube; at least one rotor which is rotatably coupled to the cap, the rotor being rotatable about the second axis, the rotor including an outer engagement wall configured to engage the support surface, the outer engagement wall having an asymmetrical shape, the at least one rotor being rotatable between: (a) a first position which distances the first end of the first leg from the support surface by a first distance; and (b) a second position which distances the first end of the first leg from the support surface by a greater, second distance.