Frequently Asked Questions
Fire Rating Requirements
This varies by manufacturer, but typically the closer cover is for cosmetic purposes only and is not required in order to maintain the listing of the product. One exception could be if the label indicating a listing for use on fire doors is attached to the cover rather than to the closer body or arm. In this case, losing the cover would result in a product without the required label.
This varies depending on which code has been adopted, but using the 2015 IBC as an example, gasketing is required when the requirements for a fire door assembly include the limitation of air/smoke infiltration when tested to UL 1784. If a section does not reference UL 1784, gasketing is not typically required. In the 2015 IBC, Section 718.104.22.168 - Smoke and Draft Control, falls under section 716.5.3 which addresses door assemblies in corridors and smoke barriers. Fire doors in these locations would require gasketing. Sections 716.5.4 Door Assemblies in Other Fire Partitions and 716.5.5 Doors in Interior Exit Stairways and Ramps and Exit Passageways do not reference UL 1784 and would not be required to have gasketing according to the 2015 edition.
Typically, gasketing at the head, jambs, and meeting stiles is needed for doors that are required to limit air infiltration to a specified level when tested in accordance with UL 1784. For some locations, usually related to elevators, a bottom seal is also required. In the 2015 edition of the International Building Code, references to UL 1784 can be found in section 710.5.2.2, section 722.214.171.124, and in several sections within Chapter 30. Although these code sections do not specifically mandate gasketing, the gasketing is required in order to limit the air infiltration to the level specified in the code.
Typically, all products used as a part of a fire door assembly are required to be listed, including gasketing (80-2016: 6.4.8). Thresholds are required by NFPA 80 to be noncombustible or listed (80-2016: 6.4.9). Listed gasketing materials are also available for doors that are required to limit air/smoke infiltration when tested in accordance with UL 1784. Indications of suitability for use on fire- and/or smoke-door assemblies is indicated in the gasketing manufacturers' catalogs.hout astragal) that is free swinging in both directions. To my understanding, only a single swing door (single or double) can be considered for fire-rating. And that a double door needs the services of an astragal.
Most exterior stair discharge doors are not required to be fire rated, but there are some circumstances where exterior walls are required to be rated and for those locations, fire door assemblies would be required.
The ability to omit the fusible fire pin on a LBR assembly depends on the listing of the hardware as well since Listed fire exit hardware and flush or automatic bolts often require the use of the pin to maintain the fire rating of the door assembly. For steel doors, the pin and its use is a function of the hardware listing much more often than the doors on their own.
Can a fire-rated floor closer be used for such a requirement? If so, can the doors still be considered as fire-rated doors?
Fire-rated doors may be listed for single swing, standard pairs (both leaves swinging in same direction), or double egress pairs (one leaf swings one direction, and the other leaf swings the opposite direction). The manufacturer’s listing will state if an astragal is required, as not all doors require the use of one.
However, we are not aware of any fire listing on a pair of doors that is free swinging in both directions–with or without astragal.
We are not aware of any 3-hour fire rated FRP doors. Any type of laminate that is attached to a fire door must be done so in accordance with the manufacturer’s labeling procedures.
The door, frame and transom must all be compatible and rated by the testing agency.
Simply installing a rated door into an existing frame may not allow for the rating to be maintained. If the frame, door or transom is modified and the manufacturer’s installation requirements are not followed the rating is not valid.
We are not aware of any exception or modification to this rule. You may wish to check with the AHJ in your area. You are correctly quoting the provisions contained in SDI 118, which is taken from the requirements contained in NFPA 80.
No. The artificial bottom seal is a component of the UL 1784 testing protocol and is not a requirement of the final door installation.
The UL 1784 test standard states, “In order to obtain information on the extent of air leakage at the ungasketed bottom gap of a test sample, an artificial seal may be applied to the bottom 6 inches (152.4 mm) of the test sample. The artificial seal may be any material, such as an impermeable sheet or tape.” By testing air infiltration with the artificial bottom seal in place, any air that would have passed through the bottom 6 inches of the door opening is not considered, so leakage at the balance of the perimeter can be accurately measured.
They must have a minimum number of approved hinges, a listed and labeled self-latching device and a labeled self or automatic-closing device.
Generally speaking, no, but the requirement is a function of the individual manufacturer's listing. Intumescent products are typically used for a smoke and fire barrier on wood doors and are activated by heat. Given the basic properties of steel (e.g. it expands when exposed to heat), sealants are typically not required on steel doors.
Anchors may be substituted provide they are like-for-like anchor types and are approved to be used in fire rated applications.
Reference the manufacturer’s installation instructions because it depends upon how the frame was tested and approved. Generally speaking, fire rated caulk is not required unless specified in the manufacturer’s installation instructions.
That requirement has been part of SDI 118 and A250.8 because they reflect the information in NFPA 80 and 101.
Traditionally, louvers were not intended for use in doors that serve as a means of egress out of a building, and exit devices are typically only used on egress openings. This may have been due to the smoke issue and the passage of smoke/heat through the louvers that could prevent people leaving. We have heard that the NEC or some form will allow exit hardware on doors so it could be up to local approval.