Abstract: A welding device includes a heated wedge having a top surface and a bottom surface, the top and bottom surfaces each including a generally planar portion and a curved potion. The curved portions of the top and bottom surfaces meet at a point. A first pressure plate includes a generally planar contact surface that contacts and covers substantially the entire planar portion of the top surface. A second pressure plate includes a generally planar contact surface that contacts and covers substantially the entire planar portion of the bottom surface.

Abstract: A wall panel for use in a flatbed trailer sidewall system includes a frame and a waterproof fabric sheet. The frame may include a bore therein to receive an enlarged edge profile of the fabric sheet. The frame of the wall panel is generally rectangular in shape and consists of a top rail, a bottom rail, and two opposing side rails extending between the top rail and bottom rail. The rails may be secured to one another using one or both of a corner bracket and a threaded insert and threaded fastener assembly.