Abstract: A trench shoring assembly including first and second spaced walls having upper surfaces with third and fourth spaced walls stacked upon the upper surfaces of the first and second walls. A plurality of tubular collars project from the various walls and are aligned vertically at each end thereof. Spreader pipes interconnect these collar projections at one end of the assembly and a spreader assembly interconnects the stacked walls at the other end. More specifically, the spreader assembly includes vertically extending metal beams interconnecting the collars projecting from the walls and tie bars extending between the vertical beams at a position spaced well above the upper surfaces of the lower walls thereby facilitating a pipe having a diameter which is greater than the vertical height of the lowermost walls.

Abstract: This invention relates to a trench shoring assembly which includes a pair of spaced apart side walls for vertical disposition within a trench. Spreader pipes and spreader collars interconnect the side walls and allow limited pivotal movement between the wide walls. Each side wall includes outer and inner metal plates connected to a plurality of interconnected structural members which define a main frame. The interconnected structural members include horizontally extending hollow metal beams including a top beam which extends longitudinally along the top of the side wall, two intermediate beams parallel the hollow metal beam and a bottom beam. A hardwood insert is disposed within the top beam to prevent the collapse of the hollow metal beam. Each side wall contains a number of hollow beams extending perpendicularly to the horizontal beams and ribbed members extending perpendicularly to the horizontal beams. These vertical beams and members are interconnected by a strip member.