Abstract: A method of assembling a rack shelving unit including first and second side frames, at least one beam, and one or more tie bars. The beam can be coupled to the side frames, and the tie bar can be resiliently compressed and retained to secure the tie bar to the beam.

Abstract: A shelving support member includes a unitary member of a bent sheet material and defining a support portion extending along an axis to a first end and a retention portion disposed at the first end of the support portion. The retention portion defines a base extending congruently with the support portion at least partially along the axis and to a first fold in the member. A reinforcement portion extends from the first fold along and in contact with the base. A first punched area is defined in an aligned manner through both the base and the reinforcement portion of the retention portion.

Abstract: A method of assembling a rack shelving unit including first and second side frames, at least one beam, and one or more tie bars. The beam can be coupled to the side frames, and the tie bar can be resiliently compressed and retained to secure the tie bar to the beam.

Abstract: A rack shelving unit includes front and rear beams, and one or more tie bars extending between the front and rear beams to form a shelf frame with the front and rear beams which can support a shelf. The tie bar can include flexible sidewalls that can flex laterally away from each other as the shelf is loaded to increase the compressive force of a compression retainer coupling the tie bar to the front and rear beams.

Abstract: A rack shelving unit includes front and rear beams, and one or more tie bars extending between the front and rear beams to form a shelf frame with the front and rear beams which can support a shelf. The tie bar can include flexible sidewalls that can flex laterally away from each other as the shelf is loaded to increase the compressive force of a compression retainer coupling the tie bar to the front and rear beams.

Abstract: The invention is directed to an apparatus for filling and sealing a canister having a weldable end wall. A weld head assembly includes a head having a welding electrode disposed within an opening for receiving a pressurized gas and defining a terminal end. The head further has a seal operably associated with the terminal end for engaging the end wall of the canister. A ball shuttle assembly includes a shuttle block having a passage for receiving the weld ball. The ball shuttle assembly further includes a device for positioning the shuttle block whereby the weld ball is in substantially coaxial alignment with the opening, and moving the weld ball into the opening of the weld head. The passage of the shuttle block is fluidly disassociated from the opening in the weld head when the seal is engaged with the end wall of the canister.