Dog 5 : A strong iron fastening for heavy timbers used in temporary work. The term is also used to describe a variety of gripping implements, e. g. a pawl; a circular clawed object to join members of a roof truss
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}