Shoring
CSI Division 31, Earthwork
A temporary support system, such as trench boxes, hydraulic shores, or sloped/benched walls, that protects workers from a cave-in while they're inside an excavation, selected and installed according to the specific soil type and excavation depth rather than a one-size-fits-all approach.
Why it matters
OSHA requires a designated competent person to select the shoring or protective system appropriate for the actual soil conditions present, since a protective system rated for one soil classification can be inadequate for a different, less stable soil type even at the same excavation depth.
On a real project
A trench dug through unstable, previously disturbed soil is protected with a trench box rated for that specific soil classification, selected by the site's competent person after evaluating the actual soil conditions rather than assuming a standard trench box would automatically be sufficient.
Who this matters most to
An Equipment Operator places trench boxes and installs shoring equipment to the competent person's specification. A Safety Manager verifies the selected protective system actually matches the excavation's documented soil classification, since choosing the wrong protection class is a common and serious excavation safety failure.
Where this goes wrong
A crew reuses a trench box from an earlier, more stable section of a project without re-evaluating soil conditions at a new location where the soil is previously disturbed and less stable. The trench box, rated for the earlier soil type, isn't adequate for the new conditions, and the mismatch isn't caught until the site's competent person performs the required inspection before work resumes.