Document ID: chunk:federal_register_of_legislation:F2016L00416:reg:4:p21
Version: federal_register_of_legislation:F2016L00416
Segment Type: reg
Provision Reference: reg 4 (pt 21/21)
Character Range: 85018–86694

the work proceeds.
Shoring means the use of timber, steel or other structural material to support an excavation in order to prevent collapse so that construction can proceed.
Soldier means vertical upright steel or timber element used for supporting a trench wall.
Strut means structural member (usually horizontal) in compression resisting thrust or pressure from the face or faces of an excavation.
Tom means structural member used to hold soldiers against a trench wall or to press walers apart in a close sheeted trench.
Trench means a horizontal or inclined way or opening:
    * the length of which is greater than its width and greater than or equal to its depth; and
    * that commences at and extends below the surface of the ground; and
    * that is open to the surface along its length.
Trench box means a structure with four vertical side plates permanently braced apart by bracing designed to resist the pressure from the walls of a trench and capable of being moved as a unit.
Trench shield means a steel or metal structure with two vertical side plates permanently braced apart by cross frames or struts designed to resist the pressure from the walls of a trench and capable of being moved as a unit.
Tunnel means an underground passage or opening that is approximately horizontal and commences at the surface of the ground or an excavation.
Waler means a horizontal steel or timber element used for supporting a trench wall.
Water scouring means an erosion process resulting from the action of the flow of water.
Zone of influence means the volume of soil around the excavation affected by any external load (for example vehicles, plant, excavated material).