It is often necessary to install new electrical cables or mechanical systems piping through a hole in a fire rated barrier which has been properly fire stopped during initial construction, in which case the firestops are referred to as being "re-entered".
It is often necessary to install new electrical cables piping through a hole in a fire. It is often necessary to install mechanical systems piping through a hole in a fire. This fire is rated barrier. This barrier has been properly fire stopped during initial construction. The firestops are referred to as. The firestops were being "re-entered" in initial construction.