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ROCKWOOD 2842 Automatic Flush Bolt Set
Material: Brass, stainless steel;
Finishes: US3, US4, US10, US10B,US10BE, US26, US26D, US32D;
Fastner: 20 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
- Non-handed
- Fully automatic– opening active door retracts top and bottom bolts
- Override feature prevents damage to doors or bolts if bolt heads are blocked from entering strikes
- Bolt head rods are adjustable up to 1-1/2"
- Thermal lock automatically locks the inactive door under high heat conditions due to fire;
Options: No. 2842 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 25
- Commercial/Residential:
- Commercial
- Product Model:
- 2842
- Product Category:
- Door Trim and Accessories
- Department:
- Door Hardware
Rockwood 2842 US26D – Frequently Asked Questions
1) Do I have to order a handed version of the Rockwood 2842 flush bolt?
No handing to specify. The 2842 set is non-handed, so the same set works on a left or right hand inactive leaf. You pick the finish and that's it.
2) What is the difference between an automatic flush bolt and a manual flush bolt on a pair of doors?
Automatic is the hands-free version. With the Rockwood 2842, opening the active leaf retracts both the top and bottom bolts on the inactive leaf automatically, so nobody has to reach up and throw a bolt by hand. A manual flush bolt like the ABH 1854 set or the Ives FB358 has to be operated by hand at each bolt, which is fine on a leaf that stays shut for months but a problem where staff open both leaves daily or where a code official wants the inactive leaf released without a separate operation.
3) Do I need to order a floor strike separately with the Rockwood 2842 flush bolt set?
Yes, plan on a bottom strike. The 2842 set is designed to be used with the Rockwood No. 570 dust proof strike, which keeps dirt out of the floor pocket so the bottom bolt keeps dropping. The set itself ships with fasteners: 20 of the #8 x 3/4 inch flat head combo screws and 2 of the #6-8 plastic anchors.
4) I have a pair of fire rated metal doors but the budget will not cover automatic bolts. What manual flush bolt can I use instead?
The ABH 1854 Series is a manual flush bolt set with a fire bolt for metal doors, and the Ives FB457 is a manual flush bolt with a 12 inch rod length for metal doors that carries a fire rating. Either handles the same job as the Rockwood 2842 in the sense of securing the inactive leaf of a pair, but the operation is different: the Rockwood 2842 is fully automatic, so opening the active door retracts the top and bottom bolts, while a manual bolt has to be thrown and released by hand at the door. That difference matters most on an opening where staff pass through the inactive leaf regularly, and on openings governed by egress requirements, where the authority having jurisdiction typically decides whether manual bolts are acceptable at all.
5) My paired doors are wood, not metal. Is the Rockwood 2842 the right automatic flush bolt?
No. The Rockwood 2842 is built for fire rated metal doors. For a wood pair, the Ives FB41 is an automatic flush bolt set for wood doors with a 3/4 inch throw and a 90 minute fire rating, and the Ives FB42 is a top automatic flush bolt for wood doors with an auxiliary fire latch. The Adams Rite 1877 is a cylinder-operated flushbolt for paired wood doors if key control on the inactive leaf is wanted. Substrate is the dividing line here: the mortise pocket and the reinforcement behind it differ between a hollow metal leaf and a wood leaf, so an automatic set built for one is not the part to prep into the other.
6) What happens if the flush bolt head hits the frame instead of dropping into the strike?
The 2842 has an override built in. If a bolt head is blocked from entering its strike, the mechanism gives rather than forcing, which keeps you from bending the bolt or racking the door. That matters on openings that settle or on frames where the floor strike is slightly out of position.
7) Can I adjust the Rockwood 2842 flush bolts if the strike lines don't line up exactly?
Yes, there's adjustment in the rods. The bolt head rods on the 2842 adjust up to 1-1/2 inches, which covers normal variation in frame head clearance and floor conditions without shimming the strike.
8) Does the Rockwood 2842 meet ANSI A156.3 for my spec?
It's built to ANSI A156.3, Type 25, and it is a commercial grade set rather than residential trim. That's the line to put on the hardware schedule when a spec calls out an automatic flush bolt for a fire rated metal pair.
9) What are the alternatives to the Rockwood 2842 if it doesn't suit my opening?
A few directions, depending on what's wrong. For another 3 hour rated automatic set with a thermal lock, the ABH 1860P/1862P automatic flush bolt pair is the closest cross-brand equivalent. If the inactive leaf is wood, the Ives FB41 automatic set is the wood door version. If you actually want the inactive leaf locked and released with a key rather than automatically, look at the Adams Rite 1870 Series cylinder operated flushbolt. And if all you need is a hand thrown bolt on a leaf that rarely moves, the Ives FB457 with a 12 inch rod is a metal door manual option.
10) Does one Rockwood 2842 order cover both the top and the bottom bolt?
Yes, it's a set. The 2842 covers the top and bottom bolts on the inactive leaf, both retracting together when the active leaf is opened, and it ships with the screws and anchors for the install. You are ordering per pair of doors, not per bolt.
11) Can I use a solid brass or mortise slide flush bolt on a commercial fire rated pair instead of the Rockwood 2842?
Those are a different application. The Delaney 6 inch square end solid brass flush bolt, the Delaney 7 inch slide type mortise in flush bolt, the Delaney 7 inch mortise extension flush bolt, and the Emtek flush bolts are hand-thrown mortise bolts of the type used on interior and residential paired doors. The Rockwood 2842 is a commercial part meeting ANSI A156.3, Type 25, built for fire rated metal doors labeled A, B, C, D and E, with automatic retraction of the top and bottom bolts when the active door opens and a thermal lock under fire conditions. On a labeled commercial opening the fire rated set is what the listing calls for.
12) What is the difference between the Rockwood 2842 and a 6 inch corner mount flush bolt like the Trimco 3999?
They are different classes of part. The Trimco 3999 and 3999SE are 6 inch corner mount flushbolts, the 3999 with a rounded end and the 3999SE with a square end, and the Orca Hardware 86SQ is a 6 inch flush bolt with radius corners. Those are short manual bolts thrown by hand at the leaf. The Rockwood 2842 is a fully automatic set where opening the active door retracts the top and bottom bolts, with an override feature that prevents damage to doors or bolts if the bolt heads are blocked from entering their strikes, a thermal lock that secures the inactive door under fire heat, and bolt head rods adjustable up to 1-1/2 inches. If a submittal calls for automatic operation on a labeled metal pair, a 6 inch corner mount bolt is not a swap for it.
13) I need to be able to key the inactive leaf so only authorized staff can release it. What should I use instead of the Rockwood 2842?
Look at the Adams Rite 1870 Series cylinder-operated flushbolt with key control, or the 1877 for paired wood doors. Those release under a key, which is what a facility wants when the inactive leaf should not be openable by anyone standing at the door. The Rockwood 2842 works on a different principle: it is fully automatic, so opening the active door retracts the top and bottom bolts with no key or hand operation at all. For a metal pair where the second leaf is opened routinely for deliveries or moves, the automatic set is the one that behaves; for a leaf that should stay locked to general traffic, the cylinder-operated bolt is the one that behaves.
14) Only the bottom fire bolt on my metal pair has failed. Do I have to buy a whole set?
Not necessarily. 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, so a single position can be addressed on its own. The Rockwood 2842 is sold as a set covering both top and bottom, with 20 each #8 x 3/4 inch flat head combo screws and 2 each #6-8 plastic anchors included. On a labeled opening the practical question is whether the existing hardware is an automatic system, since mixing a manual bottom bolt into an automatic pair changes how the opening behaves and how it was originally listed.
15) What finishes does the Rockwood 2842 automatic flush bolt come in?
Five finishes are orderable: BSP black suede powder coat, 605 bright brass tone bright chrome, 625 bright chrome, 626 satin chrome, and 630 satin stainless steel. For a building already standardized on satin chrome lever trim, 626 is the match; 630 satin stainless is the usual pick alongside stainless push plates and stainless frames.
16) Is the Rockwood 2842 flush bolt set brass or stainless?
Both are in the set. The 2842 is built from brass and stainless steel components, which is why it can be finished in plated brass tones as well as satin stainless.
17) I am matching existing hardware in satin chrome across a building. Which flush bolts come in a comparable finish?
The Rockwood 2842 automatic flush bolt set is offered in 626 satin chrome, 625 and 605 bright chrome, 630 satin stainless steel, and BSP black suede powder coat, so a satin chrome or satin stainless standard across a facility can be held on paired metal openings. Alongside it, the Ives FB358 is a manual flush bolt with a 3/4 inch throw and a 1/2 inch bolt diameter and the Ives FB457 is a manual flush bolt with a 12 inch rod for metal doors, both fire rated, if some openings in the same building call for manual operation while others call for the automatic set.
18) How does the Rockwood 2842 differ from an offset flush bolt like the International Door Closers FB-1202?
The FB-1202 is a manual flush bolt with a positive U joint actuator, a 5/8 inch throw, a 1/8 inch offset with a 7/8 inch backset, a square end and a guide. Those offset and backset figures matter because they position the bolt relative to the door edge on a specific prep. The Rockwood 2842 is an automatic set whose bolt head rods are adjustable up to 1-1/2 inches, which gives room to dial the bolt heads in to the existing strike positions on a metal pair rather than matching a fixed offset. The FB-1202 also operates by hand, while the 2842 retracts its top and bottom bolts when the active door is opened.
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Does the Rockwood 2842 US26D come with a warranty?
Absolutely. The Rockwood 2842 US26D is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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