A raising system utilizing a 1:1 me chanical advantage and a weighted object (human or otherwise) to reduce the need for additional force to lift the load. NFPA 1670, 1999 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}