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ROCKWOOD 2845 Combination Flush Bolts Set
Material: Brass, stainless steel;
Finishes: US3, US4, US10, US10B,US10BE, US26, US26D, US32D;
Fastner: Top: 8 ea. #8 x 3/4" FH combo screws. NOTE: No plastic anchor required for top only. Bottom (No. 2845 only) 18 ea. #8 x 3/4" FH combo screws, 2 ea. #6 - 8 plastic anchors.
Features:
- For Fire Rated Metal Doors labeled A, B, C, D & E up to 4'w x 8'h Top Bolt
- Automatically engages when the inactive door closes. When the active door is opened, the inactive door stays latched at the top until the top bolt is released by pressing the plunger button on the bolt face Bottom Bolt (No. 2845 only)
- Non-handed
- Fully automatic — opening active door retracts bottom bolt
- Override feature prevents damage to door or bolt if bolt head is blocked from entering strike
- Bolt head rod is adjustable up to 3/4"
- Thermal lock automatically locks the inactive door under high heat conditions due to fire
Options: No. 2845 can be used with the No. 570 Dust Proof Strike (shown on page E4).
ROCKWOOD OVERVIEW
Rockwood products are normally used on all types of institutional buildings, offices, retail, educational, detention, sports facilities, hotel and restaurant, and finer residences.
ENVIRONMENTAL MANAGEMENT
ASSA ABLOY is commited to protecting the quality of the environment as well as the health and safety of its employees, customers, and the community. Please see our Environmental Health and Safety Policy for details on how we are dedicated to this commitment.
RESOURCES & DOWNLOADS
Manufacturer Resources
Product Specs
- Product Group:
- Door Trim and Accessories
- Subcategory:
- Bolts and Latches
- Product Subgroup:
- Flush Bolts
- Product Type:
- Flush Bolts
- ANSI/BHMA:
- ANSI A156.3, Type 27
- Commercial/Residential:
- Commercial
- Product Model:
- 2845
- Product Category:
- Door Trim and Accessories
- Department:
- Door Hardware
Rockwood 2840 US26D – Frequently Asked Questions
1) Does the Rockwood 2840 flush bolt include a bottom bolt, or is it just the top?
Top bolt only. The 2840 is the top half of Rockwood's automatic flush bolt arrangement, for the inactive leaf of a pair; the bottom bolt is part of the 2845 combination set, and the fastener pack reflects that (the top bolt ships with 8 ea. #8 x 3/4 inch flat head combo screws, and no plastic anchor is needed for a top-only install). If you need both leaves of the opening bolted top and bottom, order the combination set rather than the top bolt alone.
2) How does an automatic flush bolt work compared to a manual one you throw by hand?
It works off the active leaf. With the Rockwood automatic top bolt, the inactive door engages by itself when it closes, and it stays latched at the head when the active door is opened until someone presses the plunger button on the bolt face to release it. A manual flush bolt, like the Ives FB358 or the ABH 1855S, has to be thrown and retracted by hand every time. Automatic is what you want on a pair where staff or the public use the active leaf daily and nobody will reliably reset a manual bolt; manual is fine on a leaf that opens twice a year for freight.
3) What if my head strike is not quite aligned with the Rockwood 2840 bolt?
There is adjustment built in. The bolt head rod adjusts up to 3/4 inch, which covers normal frame and clearance variation at the head without re-prepping the door. There is also an override that prevents damage to the door or the bolt if the bolt head is blocked from entering the strike, so a misaligned or obstructed opening does not wreck the hardware the first time the inactive leaf closes on it.
4) What is the closest equivalent to the Rockwood 2840 top automatic flush bolt for a pair of metal doors?
The Rockwood 2840 is the top-bolt-only automatic flush bolt for fire rated metal doors, engaging automatically when the inactive door closes and releasing by pressing the plunger button on the bolt face. For the same top-only automatic function on metal doors, the ABH 1860P/1862P automatic flush bolt pair covers the automatic category with a 3-hour fire rating and thermal lock, matching the 2840's thermal lock behavior under fire conditions. The ABH set is sold as a pair rather than a top bolt alone, so it addresses both the top and bottom of the inactive leaf.
5) Is there a manual flush bolt to use instead of the automatic Rockwood 2840?
The Rockwood 2840 is automatic: it engages when the inactive door closes and is released by pressing a plunger button, with a bolt head rod adjustable up to 3/4 inch. Where an opening calls for a bolt the user throws and retracts by hand instead, the ABH 1855S manual flush bolt single is built for metal doors with a 3/4 inch throw, and the Ives FB457 manual flush bolt is a metal door bolt supplied with a 12 inch rod. Manual bolts require someone to reach the bolt to operate it; the 2840 sets itself on door closure.
6) I need the bottom bolt too - what pairs with a Rockwood 2840 top bolt?
The Rockwood 2840 is the top bolt on its own; the full combination set adds the bottom bolt, which is fully automatic so opening the active door retracts it, and the bottom can be used with the No. 570 dust proof strike. If the bottom of the inactive leaf needs a separate bolt from another maker, the ABH 1858 is a universal bottom fire bolt of manual operation, and the ABH 1854 series is a manual flush bolt set that includes a fire bolt for metal doors. Note the ABH 1858 is manual, so it does not retract on its own the way an automatic bottom bolt does.
7) Do I have to order a Rockwood 2840 flush bolt left hand or right hand?
No handing to specify. The 2840 top bolt is non-handed, so one part number covers either leaf of the pair. That matters on a fleet of openings: you can stock a single item for the whole building instead of splitting inventory by swing.
8) Is there an equivalent to the Rockwood automatic flush bolt from another brand for a fire rated metal pair?
The closest cross-brand match we carry is the ABH 1860P/1862P automatic flush bolt pair, fire rated 3 hour with a thermal lock, which is the same automatic plus thermal lock arrangement in a pair. If you are replacing a bottom fire bolt on its own, the ABH 1858 universal bottom fire bolt is a manual operation bottom unit. Specify by leaf: the Rockwood 2840 covers the head only.
9) Is the Rockwood 2840 flush bolt rated for commercial traffic, and what standard does it meet?
It is a commercial specification part, built to ANSI A156.3, Type 27, which is the auxiliary locks and associated products standard covering flush bolts of this class. For an institutional spec sheet that is the line you cite, along with the labeled metal door range of A through E up to 4 feet by 8 feet.
10) What flush bolt should I use if the inactive leaf needs to be key controlled?
The Rockwood 2840 top bolt is released by pressing the plunger button on the bolt face, so anyone at the door can free the inactive leaf. Where access to the inactive leaf has to be restricted to keyholders, Adams Rite builds the 1870 series cylinder-operated flushbolt with key control, and the 1877 cylinder-operated flushbolt for paired wood doors. Cylinder-operated bolts are keyed rather than push-released, which changes who can open the second leaf.
11) Can I use a 6 inch mortise flush bolt in place of a Rockwood 2840?
They do different jobs. The Rockwood 2840 is a non-handed automatic top bolt for fire rated metal doors that engages itself when the inactive door closes, built to ANSI A156.3 Type 27. The Trimco 3999 is a 6 inch corner mount flushbolt with a rounded end, the Trimco 3999SE is the same length in a square end, the Orca Hardware 86SQ is a 6 inch flush bolt with radius corners, and Delaney builds a 6 inch square end solid brass flush bolt and 7 inch slide type mortise flush bolt. Those are hand-operated slide or lever bolts mortised into the door edge, with no automatic engagement and no thermal lock, so they do not substitute where an automatic fire-rated top bolt is specified.
12) What is the difference between a Rockwood 2840 and a two-point flushbolt?
The Rockwood 2840 is a single top bolt with a bolt head rod adjustable up to 3/4 inch, and it latches the inactive leaf at the top only until the plunger is pressed. A two-point flushbolt throws at top and bottom from one operation: the Adams Rite MS1880/MS1881 two-point flushbolts use an interlock mechanism, and the MS2180 series is an auto-release two-point flushbolt with a Smartlock mechanism. A two-point unit secures both ends of the leaf from one point of operation, while the 2840 handles the head of the door as a standalone bolt.
13) Which flush bolts carry a fire rating like the Rockwood 2840?
The Rockwood 2840 top bolt is made for fire rated metal doors labeled A, B, C, D and E, and it has a thermal lock that automatically locks the inactive door under the high heat of a fire. Among comparable bolts, the ABH 1860P/1862P automatic pair is fire rated 3-hour with a thermal lock, the Ives FB41 wood door automatic set is rated 90 minutes, the Ives FB358 manual flush bolt is fire rated, and the Ives FB457 metal door manual bolt is fire rated. For a labeled opening, confirm the bolt's rating covers the door's label duration.
14) What finishes does the Rockwood 2840 top flush bolt come in?
Two: 626 satin chrome and 630 satin stainless steel. On a commercial pair those are the two that match almost everything else in the opening, 626 against satin chrome levers and closers, 630 where the rest of the hardware is stainless. Match whichever finish is already on the exit device and hinges of the other openings so the inactive leaf does not read as a repair.
15) Is the Rockwood 2840 a commercial bolt, or should I look at decorative flush bolts?
The Rockwood 2840 is a commercial bolt built to ANSI A156.3 Type 27 in brass and stainless steel, offered in 626 satin chrome and 630 satin stainless steel, for fire rated metal door pairs. Decorative and residential-leaning options include the Delaney 6 inch square end solid brass flush bolt, the Delaney 7 inch mortise extension flush bolt, and Emtek flush bolts. Those are hand-operated bolts chosen largely on appearance and length, whereas the 2840 is specified against a fire label and an ANSI type.
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