Shoring 2 : Any material that is or can be used to provide effective support for the exposed face of an excavation; and 'shored' has a corresponding meaning
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}