The use of 1. 2 m x 2. 4 m (4 ft x 8 ft) sheet panels, with a strongback at�tachment, supplemented by a variety of conventional shoring options such as hydraulic, screw, and/or pneumatic shores. NFPA 1670, 2004 ed
National Fire Protection Association, Illustrated Dictionary of Fire Service Terms, Jones & Bartlett Publishers, MA. USA 2006. https://books.google.com.kw/books?id=W0WIRa3Gl4QC& printsec=frontcover&source=gbs_ge_summary_r&cad=0# v=onepage&q&f=false, (Fr Srvc - Amer) {141}