This shoring system enters in the category of slide rail shoring systems,
including rails, panels and strutting assemblies. It applies on shoring
of excavations of various shapes such as trenches, rectangular and
polygonal pits of great or lesser depth. Rails are of two types, linear
or corner rails. Pairs of linear rails are spaced apart along excavation
so that a strutting assembly keeps opposite rails of a pair of rails
pressing against wall of excavation; corner rails are placed on the
corners of any polygonal shaped excavation. Shoring panels slide
vertically between adjacent rails creating a shoring wall on two or more
sides of excavation. Rails have opposite sides provided with an outer and
an inner guide for sliding vertically panels. The outer guide runs the
full length of rail while inner guide is halfway from the bottom up
reducing the weight of rail and easing installation and removal of
panels. The corner rails are adopted to shore pits of polygonal shape of
four or more corners eliminating the need of cumbersome strutting
assemblies inside excavation. Linear rails have frontally an external
edge guide so that at least one strutting assembly slides interlocked
between two oppositely held linear rails. The strutting assembly has a
horizontal spreader and two vertical members and is modulable by mean
that two or more of them could be assembled together using vertical
extension members. Strutting assembly is provided with rollers to ease
its vertical mobility. Shoring panels are of equal design and access the
rail laterally by swinging within outer and inner guides.