Fall Block : A heavy block, generally balanced so that most of its weight is at the bottom. It rides in the bight of the mainrope and has butt rigging and tailrope attached
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}