Firestopping by the Numbers: Step by Step For Cable Installers

  1. You must know the hourly rating of the barrier. (5/8? fire rated gypsum is rated for 1/2 hr. per sheet / Cement Cinder Blocks are rated at 2 hrs.)
  2. Select the UL Listing to match or exceed the barrier. Pay attention to cable loads and fill procedure in the Listing.
  3. Go to the Cable Load Chart link. Select the proper size Sleeve, based on the % cable fill load permitted in the UL listing.
  4. Seek pre-approval from the Authority Having Jurisdiction (Inspector). Remember, it is approved if the Inspector says it is!
  5. When installing the System, be sure not to exceed the listing limitations. Read the listing.
  6. After installation, fill out the label and take a picture to document the System for future reference.

If you follow the steps listed above, you will guarantee AHJ acceptance.