Tying in 1
Tying in 1 : (1) (Fire Pr) a. Securing oneself with a rope or life belt to free both hands for work. b. Securing oneself to a ladder with a leg lock. (2) (Fire Pr) a. The act of making a connection or a securement. b. Securing a ladder to a building or other structure with rope tools or the like. See: Dog; Dog Chain. Connecting one hose to another, esp to one that has already been laid. d. The act of making a connection