Through penetration fire stop systems

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Ul 1479 Standard For Through

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Protecting penetrations through horizontal assemblies

In existing construction, there may be little or no guidance from drawings. Click here to generate a custom Detail Sheet. These systems illustrate a major problem facing designers in finding systems for floor penetrations using metallic pipes. Each of these choices is very specific as to the size and type of penetrating items, as well as the details of the construction of the floor or wall being penetrated. Determine the type of pipe you will be using to penetrate the fire barrier. Did you know that many specifications for firestopping reference older fire test standards or obsolete products. W Determines the capability of the firestop system to maintain watertightness. Enclosed corridors used for access to exits, separations between tenants and separations between dwelling units generally carry a 1-hr. North America Choose your region North America. SSS Intumescent Sealant.

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A through-penetration is defined as the service element (such as a conduit or cable) that breaches a fire-rated barrier. In the illustration on page.

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Description: These three elements--fire barrier, penetrating item and firestop product--go together to form a system that makes up the through penetration firestop. STI warrants that its products will be free of defects for one year from the date of purchase. There is an exception in both codes that says where the penetrating items are 6" diameter maximum steel, copper or cast iron pipes, the annular spaces can be filled with grout to the full depth of the assembly. If it can be assured that there will be no combustibles near the piping, NFPA allows that the T rating requirement may be dropped. Due to technical difficulties, Figure 1 noted below could not be reproduced online. For additional information, go to In existing construction, there may be little or no guidance from drawings. With 1, pages of these systems in the UL Fire Resistance Directory, this appears to be a formidable task. The hourly ratings apply only to the complete systems. ES Elastomeric Sealant. Cast-in Firestop Device.
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