Abstract: An adjustable carriage assembly is configured to be mounted on a frame member of a weight rack and includes a locking structure for locking the carriage assembly in place on the frame member. The carriage assembly may include a moveable carriage with a plurality of rollers that engage the frame member, as well as one or more handles for gripping to adjust the position of the carriage assembly and a connection structure for connection of an implement or accessory. Various implements and accessories can be connected to or used in connection with the carriage assembly, including various weightlifting implements and accessories that are pivotably connected to the carriage assembly.

Abstract: A bracket assembly includes a back plate with outer and inner sides and a pin opening extending therethrough. A clasp member has an extending portion and an encasing portion extending from the extending portion. The extending and encasing portions and the inner side of the body define a channel configured to receive a rack beam. A pin seated in the pin opening has a shank, and a head at the outer side of the back plate. The shank extends through the opening into the channel. The shank is configured to engage the rack beam within the channel. The head is welded to the outer side of the back plate. An extension member defines a support surface and includes pair of substantially J-shaped plates and a cover nested with the plates such that it forms the entire support surface and is substantially flush with sides of the substantially J-shaped plates.