DCHP-1 Online
lock-stick Lumbering 
n. the log which when released will free a jam.
See also: key-log (def. 1)
- 1926 Real peril there was in "jams" at unslided chutes, where the timber piled up to a great height, and the lock-sticks had to be cut to set the jam going.
- 1926 Real peril there was in "jams" at unslided chutes, where the timber piled up to a great height, and the lock-sticks had to be cut to set the jam going.