Common shorthand for three-way or three-fer.
See also this thread: http://www.controlbooth.com/forums/lighting/13526-fire-hazard-no-three-way-block.html.
See also this thread: http://www.controlbooth.com/forums/lighting/13526-fire-hazard-no-three-way-block.html.
This page has been seen 284 times.
-
-
Created by on
-