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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 2845 US26D – Frequently Asked Questions
1) Does the Rockwood 2845 work on wood doors, or metal only?
Metal doors only. The 2845 is built for hollow metal pairs, and the fastener pack reflects that: the top bolt uses eight #8 x 3/4 inch flat head combo screws with no plastic anchor needed, and the bottom bolt uses eighteen of the same screws plus two #6-8 plastic anchors. For a wood pair, an automatic set made for wood is the right call, such as the Ives FB41 automatic flush bolt set for wood doors or the Ives FB42 top automatic flush bolt with auxiliary fire latch.
2) What is the difference between an automatic flush bolt like the Rockwood 2845 and a manual flush bolt?
With the 2845, the bottom bolt is fully automatic: opening the active door retracts it, and the top bolt engages by itself when the inactive leaf closes. To release the top bolt you press the plunger button on the bolt face. A manual bolt has to be thrown and retracted by hand every time, which is why manual sets are usually specified where the inactive leaf stays closed. Manual options include the Ives FB358 with a 3/4 inch throw, the Ives FB457 with a 12 inch rod for metal doors, and the ABH 1854 Series manual set with fire bolt.
3) Do I need a dust proof strike with the Rockwood 2845 flush bolt?
The bottom bolt drops into the floor, so a dust proof strike is the recommended companion. The 2845 is designed to be used with the Rockwood No. 570 dust proof strike, ordered separately.
4) What if the floor or the frame is slightly out and the bolt does not line up with the strike?
There is adjustment built in. The bolt head rod on the 2845 adjusts up to 3/4 inch, which covers normal variation in floor height and frame prep. There is also an override feature so that if the bolt head is blocked from entering the strike, the door and the bolt are not damaged.
5) What is the closest automatic flush bolt equivalent to the Rockwood 2845 from another manufacturer?
The ABH 1860P/1862P automatic flush bolt pair is the nearest match. Like the Rockwood 2845, it is an automatic set with a thermal lock feature and is fire rated to 3 hours. The Rockwood 2845 is a combination set for metal doors with a top bolt that automatically engages when the inactive door closes and a fully automatic bottom bolt that retracts when the active door is opened, and it is non-handed. Both are pair-door products, so either can be specified for a paired opening where the inactive leaf must self-latch.
6) I have a pair of wood doors, not metal - what should I use instead of the Rockwood 2845?
The Rockwood 2845 combination flush bolt set is built for metal doors. For a paired wood door opening, the Ives FB41 is an automatic flush bolt set for wood doors with a 3/4 inch throw and a 90 minute fire rating, which matches the 3/4 inch adjustment range of the Rockwood 2845 bolt head rod. If only the top leaf position needs to be handled, the Ives FB42 is a top automatic flush bolt for wood doors with an auxiliary fire latch.
7) Can a Trimco 3999 or Delaney 6 inch flush bolt be used in place of the Rockwood 2845?
They are not interchangeable. The Trimco 3999 and 3999SE are 6 inch corner mount flush bolts, rounded and square end respectively, and the Delaney 4108 is a 6 inch square end solid brass flush bolt - all short manual bolts thrown by hand. The Rockwood 2845 is an automatic combination set for metal doors with a top bolt that engages on door close, a bottom bolt that retracts when the active door opens, and a thermal lock that locks the inactive door under high heat. If the opening needs self-latching or the fire rated behavior, a 6 inch manual corner bolt will not provide it.
8) What is a comparable automatic fire rated flush bolt set to the Rockwood 2845?
Closest cross-brand match in the same automatic, thermal-lock category is the ABH 1860P/1862P automatic flush bolt pair, fire rated 3-hour with thermal lock. If you want key control over the inactive leaf instead of automatic operation, the Adams Rite 1870 Series is cylinder-operated, and the Adams Rite MS2180 Series is an auto-release two-point flushbolt. Those are different operating types, not drop-in equivalents to the 2845.
9) Do I need to order a left hand or right hand flush bolt set?
No handing to specify. The 2845 is non-handed, so one set covers either leaf orientation on a pair.
10) Will the 2845 keep the inactive leaf latched when someone walks through the active door?
Yes, at the top. When the active door opens, the bottom bolt retracts but the inactive leaf stays latched at the top until someone presses the plunger button on the bolt face to release it. That is the behavior you want on a corridor pair where the second leaf should stay put during normal traffic.
11) Is the IDC FB-1202 flush bolt a substitute for the Rockwood 2845?
No. The International Door Closers FB-1202 is a manual flush bolt with a positive U joint actuator, 5/8 inch throw, 1/8 inch offset with 7/8 inch backset, square end and guide. The Rockwood 2845 is an automatic combination set for metal doors with a bolt head rod adjustable up to 3/4 inch and a thermal lock that engages the inactive door under fire heat. The throw and the mode of operation both differ, so confirm the strike prep before swapping either way.
12) I only need to replace the bottom bolt, not the whole set - what can I order?
The Rockwood 2845 is sold as a combination set covering both the top and bottom positions. If only the bottom position is being replaced, the ABH 1858 is a universal bottom fire bolt with manual operation, and the ABH 1855S is a manual flush bolt single for metal doors with a 3/4 inch throw, matching the 3/4 inch bolt head rod adjustment of the Rockwood 2845. Note both ABH units are manual rather than automatic.
13) I need the inactive leaf secured by key rather than automatically - what替 alternative is there to the Rockwood 2845?
For key control of the inactive leaf, the Adams Rite 1870 series is a cylinder-operated flushbolt with key control, and the Adams Rite 1877 is a cylinder-operated flushbolt for paired wood doors. The Rockwood 2845 has no cylinder - its top bolt engages automatically when the inactive door closes and is released by pressing the plunger button on the bolt face, with the bottom bolt retracting when the active door opens.
14) What is the difference between the Rockwood 2845 and the Adams Rite MS2180 two-point flushbolt?
The Adams Rite MS2180 series is an auto-release two-point flushbolt using a Smartlock mechanism, and the MS1880/MS1881 are two-point flushbolts with an interlock mechanism - both are two-point designs typically specified on narrow stile aluminum and storefront leaves. The Rockwood 2845 is a combination flush bolt set for metal doors, non-handed, conforming to ANSI A156.3 Type 27, with a thermal lock and an override feature that prevents damage if the bolt head is blocked from entering the strike.
15) What is the 2845 made of, and will it hold up in a high traffic commercial opening?
Brass and stainless steel construction, rated commercial, and built to ANSI A156.3 Type 27. Rockwood hardware of this class goes into institutional buildings, offices, retail, schools, detention, sports facilities, and hotels, so a busy corridor pair is within its intended use.
16) What manual flush bolt matches the 3/4 inch throw of the Rockwood 2845?
The Ives FB358 is a manual flush bolt with a 3/4 inch throw and 1/2 inch bolt diameter, and the ABH 1855S is a manual flush bolt single for metal doors also with a 3/4 inch throw. The Rockwood 2845 bolt head rod is adjustable up to 3/4 inch. The difference is operation: the Rockwood 2845 top bolt engages automatically as the inactive door closes and releases by plunger button, while both manual units are thrown and retracted by hand at the bolt.
17) Is the Orca 6 inch flush bolt with radius corners the same thing as the Rockwood 2845?
No. The Orca Hardware 86SQ series is a 6 inch flush bolt with radius corners, a short manual bolt for face or edge application. The Rockwood 2845 is a combination automatic set for metal doors supplied with 8 number 8 by 3/4 inch flat head combo screws for the top bolt and 18 screws plus 2 number 6-8 plastic anchors for the bottom, and it can be paired with the Rockwood 570 dust proof strike at the floor.
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