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Minimum fire rated jamb width
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RELATED FAQS
Question
Answer
Can an additional jamb anchor be used as a base anchor on fire rated frames?
Resolution:
Yes, an additional jamb anchor can be used at the bottom of the frame in lieu of the typical (adjustable or weld-in) base anchor in fire rated frames. This is limited to the anchor designed for...:
Where do I install my Auxiliary Fire Latch (AFL) in a Less Bottom Rod, Fire Rated (LBR-F) exit device?
Resolution:
Installation should be 6" from bottom of the door. See attached templates as reference. T-5494 for HM Doors W-5494 for Wood Doors:
What is the minimum clear opening width required by ADA on a single door?
Resolution:
The minimum clear opening width for ADA is 32" measured from face of door opened to 90 degrees to face of stop on strike jamb. There must be no hardware mounted to the door projectin...:
JAMB WIDTH
Resolution:
Jamb Depth:
What is the narrowest door a 99 rim, single door can fit on?
Resolution:
The Minimum single door opening should be 26.32" and use the 299 or 499F strike.:
Can a Senior Swing 9550 be mounted on an unequal pair of doors?
Resolution:
"PUSH SIDE" application: Minimum 52" wide pair, with neither door being less than 21" wide. "PULL SIDE" application - For Product Shipped...:
What is the minimum door width for a 98/99 Rim device with 4954 mullion?
Resolution:
Minimum door opening for a 98/99 rim device with a 4954 mullion and 299 strike is 26.687" (26 11/16"):
What are the minimum header lengths for a Senior Swing?
Resolution:
The minimum header lengths for a Senior Swing with standard Spindle centers are:Concealed 2810 Series:2811 single door (offset pivot or butt hinge) -- 33".2811 single door with stop (cent...:
What is the minimum door opening width for mounting the 4640 or 4630 on a double door?
Resolution:
The minimum door opening width (for mounting a pair of 4640 or 4630 operators on a double door) is 72" wide (2 - 36" door leaves). Mounting the 4640 or 4630 on a double door that is less than 72" w...:
What is the maximum glass light size available on a 20 minute sidelight frame?
Resolution:
On fire rated transom and/or sidelight frames and fire rated window frames, Steelcraft labeling procedures only control the O/A width and/or height of the frames based on wall condition. The amount...:
Are masonry T anchor fire rated?
Resolution:
Masonry T anchor are approved for fire rated frames up to 3 hours. T Anchors are shipped lose for field installation. Anchor construction: The T portion and the strap do have minimum dim...:
Is the 2670 Guard X fire rated?
Resolution:
The Von Duprin 2670 Guard X is used only on non fire rated doors thus is not fire rated.:
What is the maximum size of a UL fire rated three (3) sided frame?
Resolution:
Fire Rated three (3) frames are available in the following maximum door opening sizes: F and FN-Series frame:4' 0" X 10' 0" single door opening8' 0" X 10' 0” double door openingMU-Series frame...:
Can a 3 hour A labeled Fire Door be prepped for multiple glass lights?
Resolution:
A fire rated door for 3 hours can have one glass light maximum: 100 square inches and must have an approved glass (Firelite type) Max glass size cannot exceed 12" in width or 33" in height. Wi...:
Are any of the DOM exit devices rated?
Resolution:
Fire rated devices are not an option.:
Can Steelcraft doors be prepped for the 98/9949 Concealed Vertical Cable Exit Device?
Resolution:
Yes, as an option, Steelcraft doors are available with factory prepared for the 98/9949 Concealed Vertical Cable Exit Device.L, B, CE, T and CE-Series doors are available factory preparedDoor prepa...:
Are frames available without backbends?
Resolution:
F-Series frames are available without returns: Fire Rated frames must have welded corners. Frames must include weled in wood or steel stud anchors. Installation requirements: ...:
Can the fire label be replaced on a Von Duprin device?
Resolution:
The UL fire label is only applied to the device center case cover at the factory when the device is built. This label can not be sold or replaced with a new one. A ne...:
Does LCN still make a closer that has the built in smoke detector?
Resolution:
The SED/MED series closers were discontinued in 2000. The SE or ME series from LCN can be used as replacements to provide a hold open feature, but will not have the smoke detectors a...:
Is the Von Duprin 6223 fire rated for pairs of wood doors?
Resolution:
The 6223-FSE electric strike is fire rated for pairs of wood doors, but check with wood door manufacturer to see if they have been approved for this application.:
What is the largest diameter hole that Steelcraft can provide for viewer preps?
Resolution:
Non fire rated doors can be furnished with a maximum 3" diameter hole for viewer preparations.Fire rated doors have a 3/4" maximum holes size unless otherwise listed by UL or ITS/WHI. Viewers must ...:
Can I use the 990 DT trim with a fire rated device?
Resolution:
The 990DT trims are not recommended on fire rated openings. Since you cannot dog the device and the device is not electrified you are inviting people to pull on a door that will not open and possib...:
Are hospital stops approved on fire rated frames?
Resolution:
Yes, hospital stops are available on fire rated frames. Maximum approval = 3 hour Maximum sizes: singles up to 4'0" x 8'0" pairs up to 8'0" x 8'0" Maximum hospital stop height 6" from bot...:
Are astragals required on fire doors?
Resolution:
Astragals are required on: 3 hour fire rated pairs: Double doors - swinging in the same direction Double Egress - swinging in opposite directions Fire rated Dutch Doors Fire rated 1 3/4" t...:
What is the part number for the former F588 from Monarch?
Resolution:
The top latch for a Fire rated surface vertical rod device is part #650375-00 which replaced the old part #F588.:
What are the different door cores available?
Resolution:
The five most common cores are honeycomb, polystyrene, polyurethane, steel stiffened, and temperature rise. Honeycomb core doors are used for interior and exterior openings where high thermal...:
What is the maximum glass light size on a 3 hour (180 minute) fire rated door?
Resolution:
Maximum glass light sizes for 3 hour fire doors is as follows: Wire glass - not approved for use in 3 hour fire doors. Ceramic glass: UL & ITS/WH allow one (1) light with 100 square inc...:
What is the maximum glass light size on a 90 min (1 1/2 hour) fire rated door?
Resolution:
Standard listed wire glass: one (1) light with 100 in2 per door leaf max.Firelite or other appropriately listed glass:• FM maintains one (1) light with 100 in2 per door leaf max.• UL &...:
Fire Rating for AD and CO locks
Resolution:
The AD and CO locks both have a 3 hour fire door rating. Please see URL for more info. UL Fire Rating List:
What is a U-Factor?
Resolution:
The U-Factor, R-Value and K-Thermal Rating are measurements of thermal transmission through building products. U-Factor: Overall co-efficient of heat transmission passage through a built-up panel...:
What is the max rating available on an full glass (FG) door?
Resolution:
A UL 20 minute fire rating is the maximum fire rating for a Full Glass (FG) door design. A14-Series door construction: Max fire rating is 20 minute. UL label only FG must use Over-Lapping Stee...:
Can an electric strike be used with a surface vertical rod device on a fire-rated door?
Resolution:
Not for use in fire rated openings.: