Abstract: A leg assembly comprises a tubular member and a plurality of radial leg members which are connected to the tubular member through a connector. The connector includes a sleeve member with radial lug members. Each leg member has a forked joint end connected pivotally to each lug member. Positioning pin holes are provided in the lug member and slide openings are provided in the joint ends. Positioning pins are respectively threaded through the positioning pin holes and the slide openings. The positioning pins can be locked at a desired position so as to immobilize the leg members.