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Rockwood 2848 Automatic Flush Bolt with Bottom Fire Bolt for Metal Doors Fire Rated Up to 3 Hours
Model: ROC-2848
ROCKWOOD 2848 Automatic Flush Bolt with Bottom Fire Bolt
Material: Brass, stainless steel;
Finishes: US3, US4, US10, US10B,US10BE, US26, US26D, US32D;
Fastner: 10 ea.
Rockwood
Starting at
$193.38
$174.40
ROCKWOOD 2849 Self Latching Flush Bolt with Bottom Fire Bolt
Material: Stainless Steel;
Finishes: US32D;
Fastner: 8 ea. #8 x 3/4" FH combo screws, 4 ea. plastic anchors
Features:
- For Fire Rated Metal Doors
- Non-handed.
- Low (5 lbs. maximum) closing force
- Self latching top bolt
- Override feature prevents damage to doors or bolt if bolt head is blocked from entering strike
- Bolt head rod is adjustable up to 1-1/2"
- For fire rated metal doors labeled A, B, C, D, & E up to 4' w x 10' h
- Thermal lock automatically locks the inactive door under high heat conditions due to fire
- Bottom fire bolt eliminates need for floor prep
- Oversize fire bolt strike hole allows for slight door misalignment
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
- Fasteners:
- 8 ea. #8 x 3/4" FH combo screws, 4 ea. plastic anchors
- Subcategory:
- Bolts and Latches
- Product Subgroup:
- Flush Bolts
- Product Type:
- Flush Bolts
- Commercial/Residential:
- Commercial
- Product Model:
- 2849
- Product Category:
- Door Trim and Accessories
- Department:
- Door Hardware
Rockwood ROC-2849-US32D – Frequently Asked Questions
1) Do I have to drill the floor for the bottom bolt on the Rockwood 2849?
No floor prep needed. The 2849 uses a bottom fire bolt instead of a bolt that throws into a floor strike, so you are not coring the slab or setting a floor socket. That alone is usually the reason this set gets specified on a retrofit where the finished floor is already down. If your job does call for a conventional bottom rod into the floor, that is a different style of set.
2) Is the Rockwood 2849 flush bolt handed? Do I need to order left or right?
Non-handed. One 2849 set works on either leaf, so you do not specify hand when ordering and you do not need to stock two versions across a building.
3) My inactive door frame is slightly out of alignment. Will a self latching flush bolt still latch?
The 2849 has some tolerance built in for that. The fire bolt strike hole is oversized to take slight door misalignment, and the bolt head rod is adjustable up to 1-1/2 inches so you can dial in the throw to the actual head condition rather than shimming the frame. There is also an override: if the bolt head is blocked from entering the strike, the mechanism gives instead of damaging the door or the bolt.
4) Can I use the Rockwood 2849 on a pair of wood doors?
No. The 2849 is built for metal doors, and the fire label coverage it carries is for fire rated metal doors. For a fire rated wood pair, look at the Ives FB41 automatic flush bolt set for wood doors, rated 90 minutes, or the Ives FB42 top automatic flush bolt for wood doors with an auxiliary fire latch. The Adams Rite 1877 is a cylinder operated flushbolt made for paired wood doors if you want key control on the inactive leaf.
5) What is the closest equivalent to the Rockwood 2849 self latching flush bolt with bottom fire bolt for metal doors?
The Rockwood 2849 is a self latching flush bolt paired with a bottom fire bolt for fire rated metal doors. The ABH 1854 Series is a manual flush bolt set with fire bolt for metal doors, which covers the same combination of a flush bolt plus a fire bolt on a hollow metal inactive leaf. The difference is operation: the 2849 top bolt is self latching, while the ABH 1854 set is manually operated. Both are built for the same paired metal door application.
6) What automatic flush bolt pair works on a fire rated opening with a thermal lock like the Rockwood 2849?
The Rockwood 2849 includes a thermal lock that automatically locks the inactive door under high heat conditions due to fire. The ABH 1860P/1862P is an automatic flush bolt pair that is fire rated 3-hour with thermal lock, so it carries the same thermal locking behavior in an automatic rather than self latching arrangement. Choose based on whether the opening calls for bolts that throw automatically as the active leaf closes or a self latching top bolt with a bottom fire bolt.
7) I only need to replace the bottom fire bolt, not the whole set. What can I use?
The Rockwood 2849 is sold as a self latching top flush bolt together with a bottom fire bolt. If only the bottom component needs replacing, the ABH 1858 is a universal bottom fire bolt of manual operation, sold as the bottom fire bolt on its own. That is the simpler purchase when the top bolt in the door is sound and only the bottom fire bolt is being changed.
8) What are the alternatives to the Rockwood 2849 for a fire rated metal door pair?
A few, depending on how you want the leaf secured. The ABH 1854 Series is a manual flush bolt set with a fire bolt for metal doors, same door type but thrown by hand. The ABH 1860P/1862P automatic flush bolt pair is fire rated 3-hour with a thermal lock, closest to the 2849 in behavior. If you only need to replace the bottom half, the ABH 1858 is a universal bottom fire bolt, manual operation. For key control on the inactive leaf instead of automatic latching, the Adams Rite 1870 Series is cylinder operated.
9) Should I use a self latching flush bolt or a manual flush bolt on the inactive leaf?
It comes down to whether you trust the door to be secured by hand. The Rockwood 2849 self latches at the top when the leaf closes, so the inactive door is secured without anyone reaching up to throw a lever. A manual set like the ABH 1855S single or the Ives FB457 with a 12 inch rod for metal doors has to be thrown and retracted deliberately every time, which is fine on a door that stays shut for months and poor on one that gets opened weekly for deliveries. Manual sets are the simpler, cheaper mechanism; self latching is what you want in traffic.
10) Can I put the Rockwood 2849 on an aluminum storefront or a residential door?
It is a commercial product for metal doors, not a storefront or residential part. Narrow aluminum stile doors need a flushbolt made for that section, such as the Adams Rite MS1880/MS1881 two-point flushbolts with interlock or the MS2180 Series auto-release two-point flushbolt. For residential and decorative work, the Delaney 6 inch square end solid brass flush bolt or the Emtek flush bolts are the surface and mortise style pieces buyers use there.
11) Is the Ives FB358 a substitute for the Rockwood 2849?
The Ives FB358 is a manual flush bolt with a 3/4 inch throw and a 1/2 inch bolt diameter and carries a fire rating. It is a single manually thrown bolt, so it does not reproduce the Rockwood 2849 combination of a self latching top bolt with a bottom fire bolt that removes the need for floor prep. The FB358 suits an opening where the bolt is thrown by hand and the floor will take a strike.
12) What flush bolt should I use if the inactive leaf needs to be locked and released by key?
The Rockwood 2849 top bolt is self latching and is released at the bolt, with no cylinder involved. When the inactive leaf has to be under key control, the Adams Rite 1870 Series is a cylinder-operated flushbolt with key control, and the Adams Rite MS2180 Series is an auto-release two-point flushbolt with a Smartlock mechanism. Those give a keyed or auto-release two-point arrangement instead of a self latching bolt with a bottom fire bolt.
13) Can I use a mortise or solid brass flush bolt in place of the Rockwood 2849 on a fire rated metal pair?
Those are a different family of bolt. The Delaney 7 inch slide type mortise in flush bolt and the Delaney 7 inch mortise extension flush bolt mortise into the door edge, and the Delaney 6 inch square end solid brass flush bolt is a brass edge bolt; Emtek also offers flush bolts of that decorative type. The Rockwood 2849 is stainless steel, self latching, and carries a bottom fire bolt that eliminates the need for floor prep, which is what a fire rated metal pair is asking for.
14) Which flush bolt handles a slightly out of alignment paired opening better than a standard bolt?
The Rockwood 2849 has an oversize fire bolt strike hole that allows for slight door misalignment, plus an override feature that prevents damage to the doors or bolt if the bolt head is blocked from entering the strike, and a low closing force of 5 pounds maximum. A standard manual bolt such as the ABH 1855S single with a 3/4 inch throw or the International Door Closers FB-1202 with a 5/8 inch throw and 7/8 inch backset relies on the strike being cut in true. On a metal pair that has settled, the 2849 tolerance features are the reason to pick it.
15) What screws and anchors come with the Rockwood 2849 flush bolt, or do I need to buy fasteners separately?
Fasteners are in the box: 8 each #8 x 3/4 inch flat head combo screws and 4 plastic anchors. Nothing else to order to mount the set. What is not included is the strike work at the head, so confirm what the frame already has before the truck rolls.
16) What finish and material is the Rockwood 2849 flush bolt, and will it match the other stainless hardware in my building?
Stainless steel, supplied in 630 satin stainless (US32D). That is the standard commercial satin stainless finish, so it lines up with the satin stainless hinges, push plates and exit hardware most institutional and MRO standards specify. It is the only finish the 2849 is offered in.
How fast can I get the Rockwood ROC-2849-US32D delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Rockwood ROC-2849-US32D come with a warranty?
Absolutely. The Rockwood ROC-2849-US32D is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Rockwood ROC-2849-US32D?
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