Extensions are used with any of the frames to extend heights and widths to meet your needs. Extensions, like all frames utilize the UP, Union Piece for a quick connection. Extensions can be used either right or left, horizontal or vertical. Custom lengths are available.
The U frame is a secondary building block of the system. They are typically used to cap the top, bottom or sides of panels, returns and stabilizers of varying heights and widths. All widths come in 1’h legs.