trench shield


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trench shield

[′trench ‚shēld]
(civil engineering)
A movable shoring system consisting of steel plates and braces that are bolted or welded together; used to support the walls of a trench while work is in progress.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

trench box, trench shield

trench box
A heavily braced box of wood or steel which can be moved along a trench bottom as excavation and pipe laying

trench shield

A shoring system composed of steel plates and braces which are welded or bolted together; the shoring system supports the walls of a trench from the ground level down to the bottom of the trench; can be moved along as the work progresses.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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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.
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).
Trench shield 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.