Pokethrough 2 : An opening in a building wall or floor for a utility conduit, wiring, etc. , that must be firestopped after the utilities have been installed. See: Utility Hole
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}