Bracing used to temporarily prevent something, such as a tunnel, trench or ditch, from caving in
A term used in construction meaning the act of using wood or metal components to support and counteract imposed pressures either vertically or horizontally (trenching or excavations)
(Shoring system): means a structure such as a metal hydraulic, mechanical or timber shoring system that supports the sides of an excavation and which is designed to prevent cave-ins