Other sections of the standard describe sheathing removal and trench shield
advancement, precast concrete appurtenances, and adequate protection from construction toads.
In the linear or "bay" configuration used for this project, 11x1-foot parallel beams slide into the inside of linear posts and pin-in-place 6-feet-wide standard trench shield
spreader pipes as cross members.
Starting at that depth, the contractor is responsible for providing some sort of protective system, such as a trench shield
Slide Rail is installed by sliding the steel panels--similar to trench shield
sidewalls--into integrated rails on the vertical posts, and then pushing the panels and posts incrementally down to grade as the pit is dug, a process commonly referred to as a "dig and push" shoring system.
The Lite Guard, composed of a proprietary aluminum extruded panel, provides depth ratings comparable to that of a steel trench shield
at about a third the weight (see exhibit 1 for representative depth ratings).
manufacturer featured in PBS television documentary.
GME developed the 6-inch Series trench shield
for the cost conscious contractor who is hunting for that special mix between better-than-average depth capacity and moderate costs.
Efficiency Production's Slide Rail is a component shoring system comprised of steel panels (similar to trench shield
sidewalls) and vertical steel posts.
Another precaution is the use of a box or trench shield
. The box should be 15 to 20 ft long and as tall as the trench is deep.
The trench shield
or box was a production tool developed in the Great Lakes region to combat the changing soil conditions created by glacial till.
Even though the system looks similar to a trench shield
system, the installation and removal are done differently and require more precision.