{"product_id":"detex-f90kr-fire-rated-keyed-removable-mullion-7-ft-primer-gray","title":"Detex F90KR Fire-Rated Keyed Removable Mullion | 7 ft, Primer Gray","description":"\u003cp\u003eThe \u003cstrong\u003eDetex F90KR 7FT\u003c\/strong\u003e is a \u003cstrong\u003e7-foot fire-rated keyed removable mullion\u003c\/strong\u003e for pairs of commercial doors equipped with compatible \u003cstrong\u003erim-type fire exit devices\u003c\/strong\u003e. Part of Detex's \u003cstrong\u003e90 Series\u003c\/strong\u003e, this heavy-duty center mullion creates a secure strike-mounting member between two door leaves while allowing authorized personnel to remove the center post quickly when the full opening width is needed. The unit is manufactured from \u003cstrong\u003e11-gauge, 2-inch × 3-inch steel tubing\u003c\/strong\u003e in a \u003cstrong\u003epaintable primer-gray finish\u003c\/strong\u003e and includes the F90KR keyed removable upper mechanism and compatible standard factory mounting components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3-Hour Fire-Rated Mullion:\u003c\/strong\u003e The \u003cstrong\u003eF90KR\u003c\/strong\u003e (the \"F\" indicates fire-rated) is listed by Detex under \u003cstrong\u003eUL 10B \/ UL 10C and Intertek\/Warnock Hersey\u003c\/strong\u003e for use in approved fire-rated pairs of doors \u003cstrong\u003eup to 8 feet wide × 8 feet high\u003c\/strong\u003e, with up to \u003cstrong\u003ethree-hour fire protection\u003c\/strong\u003e when installed as a properly listed and approved complete opening. The \u003cstrong\u003e7FT\u003c\/strong\u003e version is intended for a door opening approximately \u003cstrong\u003e84 inches high\u003c\/strong\u003e, with field fitment to follow the current Detex installation instructions. The mullion's rating does not independently make an unrated door fire rated: both door leaves, frames, closers, rim fire-exit devices, strikes, and installation must satisfy the full assembly listing.\u003c\/p\u003e\u003csection\u003e\u003ch3\u003eAdditional Product Specifications and Ordering Guidance\u003c\/h3\u003e\n\u003ch4\u003eRemovable Mullion Selection for Paired Fire Doors\u003c\/h4\u003e\n\u003cp\u003eThe Detex F90KR keyed removable mullion is intended for a compatible paired-door and exit-device assembly. A labeled fire-door opening requires a properly approved mullion, strikes, door hardware and attachment method—not merely a physically fitting center post.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFactory item on this listing:\u003c\/strong\u003e DTX-F90KR-7FT.\u003c\/p\u003e\n\u003ch4\u003eProduct Selection and Installation Checklist\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm frame opening height, stop and floor anchoring, door widths, designated fire-rated mullion and the compatible exit-device strikes.\u003c\/li\u003e\n\u003cli\u003eCheck the removable\/keyed function and the building's required facility control over mullion removal.\u003c\/li\u003e\n\u003cli\u003eReview allowable cutting, hardware prep, handing, primer\/paint finish and clearance at the meeting stiles.\u003c\/li\u003e\n\u003cli\u003eCoordinate actual labeled fire-door approvals, closing devices and reinstallation requirements with the project hardware schedule.\u003c\/li\u003e\n\u003cli\u003eFor labeled fire exits, retain the complete listed assembly, certified mounting and latching configuration, fire-door-compatible strike and required no-dogging behavior.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAcceptance and Service Verification\u003c\/h4\u003e\n\u003cp\u003eCheck both exit-device latches, secure mullion seating, smooth door closure and retention of the approved fire-opening hardware configuration.\u003c\/p\u003e\n\u003ch4\u003eFactory Package and Related Components\u003c\/h4\u003e\n\u003cp\u003eThe mullion assembly and factory mounting items supplied with the specified SKU; separate exit devices, strikes not identified in the package and installation labor are excluded. Consult the original model specifications below when matching the factory SKU to an existing opening.\u003c\/p\u003e\u003c\/section\u003e\n\u003cp\u003e\u003cstrong\u003eKeyed Removal Without Removing Screws:\u003c\/strong\u003e The \u003cstrong\u003eframe-mounted top fitting\u003c\/strong\u003e incorporates the F90KR locking head and permits authorized removal of the mullion by turning a key \u003cstrong\u003eonce\u003c\/strong\u003e. Once the mullion is released, the steel post can be lifted out of the lower fitting to restore full doorway clearance for moving equipment, deliveries, facility maintenance, or other approved temporary access. \u003cstrong\u003eReinstallation is accomplished by seating the post and snapping it back into the locking head without using the key\u003c\/strong\u003e. The small-profile bottom\/base fitting reduces interference in the doorway when the post is removed. The locking cylinder is positioned \u003cstrong\u003einside the building\u003c\/strong\u003e to reduce access from the outside.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRim Cylinder Sold Separately:\u003c\/strong\u003e Detex ships the standard keyed removable mullion \u003cstrong\u003ewithout the rim cylinder\u003c\/strong\u003e unless the factory or dealer expressly specifies a cylinder option. Select a compatible \u003cstrong\u003erim cylinder and appropriate keying\u003c\/strong\u003e to operate the mullion's release head; verify cylinder dimensions, tailpiece length, cam\/drive, housing and key system with the manufacturer's current F90KR instructions before ordering. This product is \u003cstrong\u003enot\u003c\/strong\u003e supplied with a complete panic exit device, a pair of rim strikes, a door leaf, or a door frame.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSHK1 Fire-Exit Strike Hook Kit:\u003c\/strong\u003e Detex identifies the \u003cstrong\u003eSHK1 strike hook kit as standard with its fire-rated removable mullion\u003c\/strong\u003e. This component is part of the fire-rated application and must be installed and matched to the chosen rim devices and approved strike arrangement. Detex permits \u003cstrong\u003efield location and preparation of the strike on the F90KR\u003c\/strong\u003e according to the listed hardware and approved templates. Confirm actual strike model, device manufacturer, hook installation and the requirements of the fire-exit assembly before cutting or drilling.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePrimer Gray Steel Construction:\u003c\/strong\u003e The 11-gauge steel mullion tube is built for high-use commercial openings and is finished in \u003cstrong\u003estandard gray shop primer\u003c\/strong\u003e for field painting to match the frame or door. It is \u003cstrong\u003enot satin stainless steel 630\u003c\/strong\u003e, polished brass, electrified, or automatically weatherized. The upper fitting mounts to the head frame, while the small-profile lower shoe\/base is anchored to the floor with manufacturer-specified anchors and shims. Detex's mounting design avoids the need to drill the mullion tube during standard assembly.\u003c\/p\u003e\n\u003ch3\u003eKey Features and Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetex F90KR 7FT:\u003c\/strong\u003e Genuine 90 Series fire-rated keyed removable center mullion for 7-foot paired commercial doors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to three-hour fire-rated listing:\u003c\/strong\u003e Intertek\/Warnock Hersey and UL 10B\/10C listing for approved pairs up to 8 ft wide × 8 ft high, subject to full opening construction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty 11-gauge steel:\u003c\/strong\u003e 2 in × 3 in rectangular steel mullion tube, designed for demanding commercial use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e84-inch nominal door height:\u003c\/strong\u003e Designed for compatible standard seven-foot door openings, with post length and field adjustment specified by Detex.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick keyed release:\u003c\/strong\u003e One key turn releases the mullion for removal without taking out frame- or floor-mounting screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSnap-back reinstallation:\u003c\/strong\u003e Refit and lock the post into its frame-mounted top fitting without turning the key.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside-mounted cylinder:\u003c\/strong\u003e Lock cylinder location inside the building reduces unauthorized exterior manipulation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim cylinder is optional \/ sold separately:\u003c\/strong\u003e Match compatible keying and cylinder hardware to the site before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame-mounted locking head:\u003c\/strong\u003e Locking mechanism remains attached at the header when the post is temporarily removed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-profile base fitting:\u003c\/strong\u003e Small bottom footprint is intended to minimize obstruction when the mullion post is removed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstaller-friendly hardware:\u003c\/strong\u003e Base anchors, mounting components and recommended fitting arrangements support new and retrofit door installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire-rated SHK1 strike hook kit:\u003c\/strong\u003e Detex documents the strike hook kit as standard equipment on the F90KR fire-rated version.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField strike preparation permitted:\u003c\/strong\u003e Detex's rated-mullion listing allows installation-specific strike positioning when performed according to manufacturer and listing requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePaintable gray primer:\u003c\/strong\u003e Standard finish can be field coated to match commercial frames and doors following preparation guidance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim exit device compatibility:\u003c\/strong\u003e Designed for Detex Advantex, Value Series and certain other approved manufacturers' listed rim fire-exit devices; approval must be checked for the exact hardware combination.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-opening accessibility when removed:\u003c\/strong\u003e Convenient for oversized deliveries, equipment movement and maintenance, provided the opening's egress\/fire-door controls are managed safely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo mullion-tube drilling for basic assembly:\u003c\/strong\u003e Uses specialized top\/bottom fittings and factory mounting hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField fitment:\u003c\/strong\u003e Detex provides mullion cutting and installation instructions; preserve required clearances and fire-listing conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDifferent from 90KR:\u003c\/strong\u003e F90KR is the specifically \u003cstrong\u003efire-rated\u003c\/strong\u003e keyed removable series; the standard 90KR is not the specified fire-rated product.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDifferent from F90R:\u003c\/strong\u003e F90KR is \u003cstrong\u003ekey-removable\u003c\/strong\u003e, unlike the conventional screw-removable F90R assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-electrified:\u003c\/strong\u003e No electrical transfer, contacts, powered release or access-control electronics included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003eDetex Corporation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003e90 Series Keyed Removable Mullions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer Model\u003c\/th\u003e\n\u003ctd\u003eF90KR 7FT (also referenced as F90KRx7 \/ F90KR-7)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShopify SKU\u003c\/th\u003e\n\u003ctd\u003eDTX-F90KR-7FT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Category\u003c\/th\u003e\n\u003ctd\u003eFire-rated keyed removable steel mullion for paired doors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOpening Height\u003c\/th\u003e\n\u003ctd\u003e7 ft \/ 84 in nominal commercial double-door opening\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMullion Post\u003c\/th\u003e\n\u003ctd\u003e11-gauge rectangular steel tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTube Section\u003c\/th\u003e\n\u003ctd\u003e2 in wide × 3 in deep nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApprox. Factory Post Length\u003c\/th\u003e\n\u003ctd\u003e82-1\/4 in for 7-ft version according to Detex installation drawings; field fit to approved opening\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eStandard primer gray, field-paintable; not stainless 630\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRated Listing\u003c\/th\u003e\n\u003ctd\u003eUL 10B \/ UL 10C; Intertek \/ Warnock Hersey fire-rated mullion listing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Listed Door Pair\u003c\/th\u003e\n\u003ctd\u003eUp to 8 ft × 8 ft paired doors, up to 3 hours with compatible listed assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMullion Removal\u003c\/th\u003e\n\u003ctd\u003eKey-operated one-turn release; remove post to clear doorway\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMullion Replacement\u003c\/th\u003e\n\u003ctd\u003ePost snaps into frame-mounted locking head without key reoperation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLock Cylinder\u003c\/th\u003e\n\u003ctd\u003eCompatible rim cylinder required; sold separately unless explicitly ordered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCylinder Location\u003c\/th\u003e\n\u003ctd\u003eInside the building at the keyed release fitting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTop Fitting\u003c\/th\u003e\n\u003ctd\u003eF90KR fire-rated frame-mounted key-release locking head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBottom Fitting\u003c\/th\u003e\n\u003ctd\u003eCompact anchored shoe\/base fitting with concealed fasteners after assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStrike Hook Kit\u003c\/th\u003e\n\u003ctd\u003eSHK1 – manufacturer states standard for F90KR fire-rated mullion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStrike Preparation\u003c\/th\u003e\n\u003ctd\u003eField-locatable \/ field-preparable, only per current Detex listing and exit-device templates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExit Device Compatibility\u003c\/th\u003e\n\u003ctd\u003eApproved rim-type fire-exit hardware for pairs with mullions; verify manufacturer model and strike\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHurricane Rating\u003c\/th\u003e\n\u003ctd\u003eNot specified; separate hurricane-rated mullion models are available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eElectrical Components\u003c\/th\u003e\n\u003ctd\u003eNone; conventional keyed mechanical release\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShipping Weight\u003c\/th\u003e\n\u003ctd\u003e42 lb provisional estimate for mullion, fittings and protective shipping package; verify actual vendor-packed weight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShipment Dimensions\u003c\/th\u003e\n\u003ctd\u003eOversized approximately 7-ft-long package; verify carton length, width and height for UPS or freight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003eCurrent Detex limited warranty terms; verify applicable coverage with supplier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eWhere to Use the F90KR 7FT\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire-rated paired hollow-metal doors:\u003c\/strong\u003e Used with correct fire-exit rim hardware and fire-listed door\/frame arrangement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHealthcare and institutional facilities:\u003c\/strong\u003e Doorways requiring secure daily operation with occasional unobstructed full-width clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSchools and government facilities:\u003c\/strong\u003e Heavy-traffic double doors with keyed removable center posts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarehouse and loading access:\u003c\/strong\u003e Rated personnel-door pairs that must accommodate oversized equipment at controlled times.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommercial offices and public facilities:\u003c\/strong\u003e Paired exits requiring compatible rim strikes and scheduled maintenance access.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetrofit of approved mullion systems:\u003c\/strong\u003e Replacement or upgrade where header\/base mounting, fire-door listing and strike preparation are compatible.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003eOne \u003cstrong\u003eDetex F90KR 7FT fire-rated keyed removable 7-foot steel mullion assembly\u003c\/strong\u003e consisting of the \u003cstrong\u003eprimer-gray steel center post\u003c\/strong\u003e, manufacturer-standard \u003cstrong\u003ekeyed-release top fitting and cylinder housing\u003c\/strong\u003e (less operating cylinder), \u003cstrong\u003elow-profile bottom base fitting\u003c\/strong\u003e, base anchors and mounting\/shim components per the current factory kit. The \u003cstrong\u003eSHK1 strike hook kit\u003c\/strong\u003e is identified by Detex as standard with the fire-rated F90KR. Verify actual supplier carton contents and required strike hardware before installation.\u003c\/p\u003e\n\u003ch3\u003eNot Included Unless Specially Ordered\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eRim cylinder, cylinder keys, keyed-alike service, Detex or other rim exit devices, matching rim-device strikes (unless separately specified), doors, frames, closers, door hardware, field painting, site-specific fire protection components and installation labor\u003c\/strong\u003e are not included. The keyed-release mechanism is part of the mullion hardware, but the \u003cstrong\u003eoperating cylinder itself must be purchased separately\u003c\/strong\u003e unless factory equipped.\u003c\/p\u003e\n\u003ch3\u003eInstallation \u0026amp; Fire-Protection Notes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eModel decoding:\u003c\/strong\u003e \u003cstrong\u003eF90KR\u003c\/strong\u003e = fire-rated, keyed removable 90 Series center mullion; \u003cstrong\u003e7FT\u003c\/strong\u003e = seven-foot door-height version. Follow manufacturer instructions for header\/frame strength, the top fitting attachment, lower base anchorage, field tube sizing and strike location, the SHK1 hook kit, cylinder\/tailpiece selection and the exact approved rim fire-exit device combination. Removing a mullion from a protected fire door pair affects its latching arrangement; keep the assembly correctly installed and latched whenever fire-door performance is required. The mullion is \u003cstrong\u003enot an exit bar, outside trim, or a 630 stainless finish\u003c\/strong\u003e. Before publication and shipping, verify the \u003cstrong\u003e42 lb provisional weight\u003c\/strong\u003e, actual oversized carton dimensions, long-package carrier surcharges and the current Detex\/SECLOCK factory package contents.\u003c\/p\u003e","brand":"Detex","offers":[{"title":"Default","offer_id":68040961589463,"sku":"DTX-F90KR-7FT","price":848.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/4933\/1927\/files\/DETX-F90KR-7FT__1.jpg?v=1794428214","url":"https:\/\/shop.commercialdoorworx.com\/products\/detex-f90kr-fire-rated-keyed-removable-mullion-7-ft-primer-gray","provider":"Commercial Door Worx","version":"1.0","type":"link"}