Firestop Special Inspections Series - Part3

Firestop Special Inspections - Video 3 of a 7 part series Inspecting penetration firestop systems While the majority of firestop systems are UL systems, there are also other intendent third-party testing agencies that publish systems that must be followed when installing firestop products. It are details in these tested, listed systems that you will be inspecting to. First, always ensure that the rating of the firestopping system to be installed is equal to or greater than the assembly or assemblies being firestopped. Often in new construction it is easy to find the life safety drawing to identify rated assemblies and their corresponding hourly rating. However, in renovation projects where drawings may not be available, you can look for indications of a fire rating such as previously installed firestop systems, fire windows or doors, fire damper ducts or even wall stenciling. Next you will want to verify, the opening size and whether fits within the parameters of the chosen system. Then, identify all penetrating items, their type and their maximum sizes, In metallic pipe conditions you’ll need to know if is it steel, iron, copper, conduit… Combustible, or plastic pipe, you’ll need to know if is it PVC, cPVC, ABS, etc… The pipe diameter, insulation type & thickness are also factors in proper system selection When dealing with cables you will need to identify the type of cable and the exterior jacketing. Spacing of cables or bundles may be a consideration, as is the bundle size itself. Finally unless using a device such as EZ Path the fill percentage of the opening will need to be calculated. … these penetrations along with others such as Cable Trays, Busway, Ducts, and mixed multiple penetrates… There will always be minimum and maximum annular space requirements and allowances. Penetrations with larger annular space may require forming, packing or backer materials such as mineral wool. However, it is worth noting that some systems allow for this material to be optional. It should go without saying that the specific firestopping product being installed is absolutely critical… as is the installed amount, depth and location… there are many different products that look similar, they may even be red. The supplied products must have labels from a recognized quality assurance agency. For penetrations you are looking for ASTM E814 or UL 1479. Finally the details will tell you if any accessory items, such as anchors, fasteners, securing devices, plates, etc. are required.