Are your Firestop Submittals Missing Shaft Details? (part 4)

Thanks for reading along so far. We have covered a lot in this series on shafts and hopefully you have been able to put some of this to use in the field. Next up, let’s look at what you should see when you are walking in the field looking at all that firestop stuff. Specifically, are your firestop submittals missing shaft details? Let’s put all this information to work for you.

First, you need to have the firestop submittals that show the firestop requirements for all of these shaft applications. If you don’t have the details, you can’t properly evaluate the installations.

Let’s walk a site together (You will need to use your imagination here). Say we are on the 5^thfloor of a hotel project. We are looking at a mechanical shaft. We have bare pipes and insulated pipes stubbing out of the wall to provide water to the bathroom. The shaft liner is up, but there is no firestop on the pipes. We go up to the 6^th floor, the drywall is on the outer layer of all the shafts, but they have firestopped only about half of them. As you walk down the hall you see an area where they have not yet firestopped the penetrations into the shaft wall and you can see that they have not firestopped the shaft liner side. This is a problem. Firestop is required on both sides of a wall, even a shaft wall.

Let’s consider the same scenario. This time, they had firestop on the shaft liner side on the 6th floor. However, when you were on the 5th floor, you noticed that the hole cut for the small insulated copper pipe is just big enough to fit the pipe and insulation through. The insulation was almost touching the cut edge of the drywall all the way around. You don’t have firestop submittals for the project so you can’t tell that the detail requires annular space of 0-1/2” and what you have in your field condition is continual point contact.

The other thing you can’t see is that the firestop detail calls for 5/8” of firestop in the annular space. Since there is no annular space there is no way to achieve this depth requirement. You have some problems. The first problem is that you don’t have your firestop submittals. This means you can’t reference the requirements when you speak with the installer. Second, they have created an installation that can not be finished correctly. Remember those blogs where we talked about continual point contact and the importance of proper annular space?

Are your Firestop Submittals Missing Shaft Details? Please remember that if you’re looking at a block wall, you must firestop both sides or firestop one side twice. This is true both for joints and for through penetrations. If it is a shaft, you likely can’t get to the inside to check on the installations. You may need to go to the bottom of the shaft before someone closes it off to take a look. Alternatively, you can conduct destructive testing to confirm that the work was done correctly. Please also remember that the firestop details have to match the field installations. If they don’t, it is non conformant. 

If you are working on a project and you have questions about your firestop submittals, or installations, please do not hesitate to give us a call.  We are happy to help whenever we can. If you are close enough, we might even swing by to assist if our schedule is open.