Ul l501

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Building and fire codes require fire and smoke protection features to safeguard building occupants from fire hazards and hazards associated with smoke and hot toxic gases generated during a fire situation. This includes requiring fire-resistance-rated assemblies, such as fire walls, fire barriers, fire partitions, shaft enclosures and horizontal assemblies be provided to limit the spread of fire. This system of passive protection is an integral part of the overall fire safety approach taken by the model codes. This marking and application guide provides important information on limiting the spread of fire, smoke and toxic gases by protecting duct penetrations and air-handling openings in fire and smoke rated assemblies. There are five types of dampers recognized by the model codes for this purpose: fire, smoke, combination fire-smoke, ceiling and corridor dampers. UL certifies all five types of dampers in accordance with the requirements in model building, fire, and mechanical codes. These dampers and the applications for which they are certified are covered in detail in this guide.

Ul l501

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Combination fire-smoke dampers are used to restrict both the spread of fire and movement of smoke where ducts and air transfer openings penetrate assemblies that are designed to restrict the passage of both fire and smoke, ul l501.

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Ul l501

Contact us This page allows you to search for your desired UL fire rated assemblies, designs or systems. Please click the specific link below to access the information you are looking for. Helpful instructions and resources to help you locate UL fire rated assemblies, designs and systems. Fire-resistance rated assemblies. Step-by-step instructions on locating rated walls, floors, beams and columns. Firestop systems. Step-by-step instructions on locating through penetration firestop system certifications. Joint systems. Links to joint systems for use in static and dynamic applications.

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Review Subject Required. For information on smoke control systems, see NFPA Smooth outside surface resists dirt and bacterial growth and allows for easy cleaning. When the duct penetrates through the membrane ceiling of a fire-resistance-rated floor-ceiling or roof-ceiling assembly, but not through the floor or roof, then a ceiling damper is used. The control requirements of NFPA 90A include provisions for manual and automatic control of smoke and combination fire-smoke dampers. If the horizontal assembly is also a smoke barrier, a combination fire-smoke damper is required. Heavy Duty Current: 1. Heavy Duty Current: 96Amps. It regulates the installation, control and acceptance testing of fire, smoke, combination fire-smoke and ceiling dampers used to protect ducts and air transfer openings in walls, floors, and ceilings against the spread of fire and smoke within, into, or out of buildings. Fire dampers are investigated for use in specific fire-resistive vertical or horizontal assemblies as specified by the installation instructions that are supplied by the product manufacturer.

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UL has developed this guide for use by code and inspection authorities, architects, contractors, installers and other interested parties. The shaft should be penetrated horizontally so that vertical dampers can be used to protect the penetration through the shaft. This system of passive protection is an integral part of the overall fire safety approach taken by the model codes. Method 2. Each damper shipment is supplied with a copy of the installation instructions appropriate for the specific damper model. Ready to discuss your project? Like any mechanical device, dampers require periodic maintenance to ensure continued proper operation. Ceiling membranes are part of floor-ceiling or roof-ceiling fire resistance rated assemblies that have been evaluated in accordance with the Standard for Fire Tests of Building Construction and Materials, UL The airflow rating for a particular application is not necessarily one that matches the normal design airflow within the ducts. The maintenance requirements include topics such as the changes in the airflow and noise from the duct, lubrication and required documentation. Anyone directly involved with a product — including manufacturers, owners, contractors, and regulatory authorities — can request a field inspection or field evaluation. Instructions are required to be shipped with each Damper for use by the installation contractor at the construction site.