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Membrane penetration firestop systems
3M Through Penetrations | 3M United States
What are membrane penetration firestop systems and how has the penetration firestop standard evolved to evaluate them? The changes include a new section for definitions relating to the various types of membrane-penetrations, a description of the test setup for membrane-penetrations, and the conditions of acceptance for membrane-penetrations. For example, when a firestop system protecting a plumbing pipe penetrates the gypsum membrane on one side of a fire-resistance-rated gypsum wall, this revised standard would be used to evaluate that firestop system. Penetration Firestop System A through-penetration firestop or a membrane-penetration firestop.
Firestop & Fire Protection
Welcome back to our discussion about firestopping shaft penetrations. With this post we are looking into the question of how do you properly firestop penetrations in a shaft wall assembly. First we will look at block wall assemblies. For the sake of this discussion we will assume these are shafts where we have no reasonable access to the inside of the shaft.
We all know UL systems are very specific in calling out the requirements that must be met in order to have a complete system. The majority of UL systems are tested with the penetrating item passing through perpendicular to the wall assembly or floor assembly. There are some UL systems that allow the penetrating item to pass through the assembly at an angle which will be indicated within the individual UL system. A perfect example of a UL system that allows for the penetrant to be installed at an angle through the assembly is W-L For those systems that do not specifically allow for the penetrant to be installed at an angle the UL Guide Information for Through-Penetration Firestop Systems can be referenced.