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Stanley Security QRM313 Grade 1 Mullion, Fire Rated
The Stanley QRM313 is a Grade 1 commercial mullion designed for use with pairs of doors equipped with rim exit devices. It features a keyed removability (KR option), which allows the mullion to be removed when needed for passage or maintenance, while maintaining security functionality when installed.
This mullion is fire-rated, making it suitable for code-compliant entrances. It is pre-prepped to fit Stanley’s QED100 and QED300 exit device series. Multiple finishes are available—including Aluminum Painted (689/US28), Dark Bronze Painted (695), and Primer (600)—to match architectural aesthetics. Length options cover standard 8 ft height, with longer versions (9 ft, 10 ft, 11 ft, 12 ft) for taller openings; additionally, field-sizing is possible
Specifications
| Specification | Detail |
|---|---|
| Model | QRM313 – Keyed Removable Mullion (KR option) |
| Grade / Rating | ANSI/BHMA Grade 1; Fire-rated for standard heights (max 8 ft for fire rating, longer available) |
| Device Type | Mullion for double door with rim exit devices |
| Finish Options | Aluminum Painted (689/US28); Dark Bronze Painted (695); Primer (600) |
| Standard Height | 8 ft (96 in) standard; variants up to 12 ft; field-sizable for non-standard openings |
| Material / Construction | Steel mullion tube, typically 2″ × 3″ with ~1/8″ wall thickness; finishes applied to protect and match visual design |
| Keyed Removable | Yes – allows removal of the mullion when needed for large clearance or maintenance |
| Compatible Exit Devices | Pre-prepped to accept Stanley’s QED100 and QED300 Series exit devices |
| Finish Codes | 600 (Primer), 689 (Aluminum Painted), 695 (Dark Bronze Painted) |
Benefits
-
Fire-rated for safety compliance
-
Keyed removable design adds flexibility for access and maintenance
-
Multiple finishes allow matching architectural styles
-
Field-sizeable options support different door height requirements
Manufacturer Resources
Product Specs
- Product Group:
- Exit Devices and Trim
- Series:
- QRM300 Series
- Product Subgroup:
- Exit Devices - Rim
- Product Type:
- Mullions
- Subcategory:
- Exit Devices
- Commercial/Residential:
- Commercial
- Product Category:
- Exit Devices and Trim
- Department:
- Door Hardware
Stanley Security QRM313 KR 9 689 – Frequently Asked Questions
1) What does a removable mullion do on a pair of doors with rim exit devices?
A mullion is the vertical post that sits between two leaves of a pair, giving each rim exit device something to latch into. The Stanley QRM313 does exactly that: it lets you use rim devices on both leaves instead of vertical rod devices, and because it is removable you can take it out to move wide equipment or furniture through the full opening. Put it back and the pair latches and secures normally.
2) Which exit devices will the Stanley QRM313 mullion work with?
It comes pre-prepped for Stanley's QED100 and QED300 Series rim exit devices, so the strike prep on the tube already lines up with those devices. It is a rim-device mullion only, not for vertical rod or mortise devices.
3) Is the QRM313 mullion fire rated, and does that apply to the taller lengths?
The QRM313 is fire rated at standard height, with 8 ft (96 in) the maximum length carrying the fire rating. The 9, 10, 11 and 12 ft versions are offered for taller openings. If the opening is a fire door assembly, order the 8 ft.
4) What is the difference between the keyed removable and non-keyed removable mullion options?
Keyed removable (the KR option) means a key releases the mullion so it can be lifted out for passage or maintenance, then reinstalled. The non-keyed version is ordered when you do not want anyone pulling the post out in the field. Both choices are offered in every length from 8 ft through 12 ft and in all three finishes, so pick the option before you pick the finish.
5) I need a mullion for a fire rated pair of doors - does the Sargent 980 work or should I stay with Stanley?
The Stanley QRM313 is fire rated, with the rating applying at standard heights up to 8 feet, and it carries ANSI/BHMA Grade 1. The Sargent 980 is described as a removable mullion in T-shape extruded aluminum with an 86 inch standard height. For a code compliant fire rated opening, the QRM313 is the one whose fire rating is stated, so specify it when the drawing calls for a fire rated pair.
6) What finishes does the Stanley QRM313 mullion come in, and which one should I order if it is getting painted?
Three: 689 Aluminum Painted (US28), 695 Dark Bronze Painted, and 600 Primer. Order 600 Primer when the mullion is going to be field-painted to match the frame color; 689 and 695 are finished and ready to install. All three are available in every length from 8 ft to 12 ft.
7) Is the QRM313 mullion Grade 1, and what is the tube made of?
ANSI/BHMA Grade 1, which is the heaviest commercial duty rating and what most institutional and government specs call for. The post itself is a steel tube, typically 2 in by 3 in with roughly 1/8 in wall, with the finish applied over it.
8) Should I use a mullion with rim devices or just put vertical rod devices on the pair?
A mullion plus two rim devices is generally the simpler and lower-maintenance route: the latching is all at the strike on the post, with no rods to adjust or bottom rods to catch debris. The trade-off is the post stands in the opening. Surface or concealed vertical rod devices leave the opening clear but bring rod adjustment and more hardware on the door. The QRM313 is removable, which softens the main objection to mullions since you can take it out when you need the full width.
9) How does the Stanley QRM313 compare to the Sargent 980 removable mullion?
Both are removable mullions for pairs with rim exit devices. The Sargent 980 is a T-shape extruded aluminum mullion with an 86 in standard height. The Stanley QRM313 is a steel tube, typically 2 in by 3 in, with an 8 ft (96 in) standard height and additional lengths through 12 ft. If you are matching existing Sargent rim devices, the 980 is the in-family choice; the QRM313 comes prepped for Stanley QED100 and QED300 devices.
10) Can I standardize one mullion across a building with different frame heights?
Yes, within limits. The QRM313 runs 8, 9, 10, 11 and 12 ft in the same finish and the same keyed-removable choice, and the tube is field-sizable for non-standard openings, so a facility can spec one series and one finish across the whole property. The one thing that cannot be standardized is fire openings: those need the 8 ft length, since the fire rating applies to standard height.
11) Will a Sargent 980 mullion accept Stanley QED100 exit devices without extra prep?
The Stanley QRM313 is pre-prepped to accept Stanley QED100 and QED300 Series rim exit devices, so that pairing needs no added machining. The Sargent 980 is a removable mullion in the Sargent 980 Series; if you are installing QED Series devices, the QRM313 is the mullion already prepped for them.
12) What is the difference between an aluminum mullion and a steel one for a high traffic entrance?
The Sargent 980 is an extruded aluminum mullion in a T-shape profile. The Stanley QRM313 is a steel mullion tube, typically 2 inch by 3 inch with roughly 1/8 inch wall, finished in Primer (600), Aluminum Painted (689/US28) or Dark Bronze Painted (695). The steel tube gives you a painted finish you can match to the frame, while the extruded aluminum profile of the 980 is a different section shape at a fixed 86 inch standard height.
13) Do I need the keyed removable option, or is a fixed mullion enough?
The Stanley QRM313 is offered both with and without the keyed removable (KR) option in every length from 8 to 12 feet and in all three finishes. Keyed removable lets staff take the mullion out with a key for wide loads or maintenance and reinstall it for security. The Sargent 980 is a removable mullion as well. If the opening never needs to pass oversized items, the non-keyed-removable QRM313 configuration covers it.
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Does the Stanley Security QRM313 KR 9 689 come with a warranty?
Absolutely. The Stanley Security QRM313 KR 9 689 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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