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ROCKWOOD OH200 Series Heavy Duty Concealed
Material: Stainless steel;
Finishes: US32D;
Fastner:
Jamb: #12-24 x 1/2" FH MS or #12 x 1-1/2" FH WS
Door: #12-24 x 1-1/2" FH MS or #12 x 1-1/2" FH WS
Options:
- Doors may be single or double acting
- Non-handed
- Slide track design
- Recommended for medium traffic, medium weight doors
- Degree of opening is fully adjustable and can be adapted to changing needs
- Heavy shock absorber spring provides 5-7° compression before deadstop
- Multi-function unit is shipped as a stop. Can be converted to a hold open or friction in the field. MF5012 KIT (Adapter kit) included
- Complete screw packet kit for installation in wood or metal door and frame
- For security areas, Torx® screws available for exposed fasteners, but heavyduty units should be considered for high security applications
- Durable slider cam and shock block
- 110° maximum opening
- 3/4" square channel
- Stop function UL listed for fire door assemblies
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 Controls
- Product Subgroup:
- Overhead Stops and Holders
- Product Type:
- Overhead Stops and Holders - Concealed Mount
- Subcategory:
- Stops
- Commercial/Residential:
- Commercial
- Hang Type:
- Center Hung
- Product Model:
- OH203M
- Product Category:
- Door Controls
- Product Substrate:
- Stainless Steel
- Department:
- Door Hardware
Rockwood ROC-OH203M-US32D – Frequently Asked Questions
1) How far does the Rockwood OH203M let the door open?
110 degrees maximum, and the degree of opening is fully adjustable below that, so you can dial the stop back if a wall, a casework return, or an adjacent door is in the way. A heavy shock absorber spring gives 5 to 7 degrees of compression before the deadstop takes the load, which is what keeps the shock off the top rail and the frame.
2) What overhead stop should I specify instead of the Rockwood OH203M for a high traffic or abusive opening?
The OH203M is a standard duty unit recommended for medium traffic, medium weight doors, and heavy duty units should be considered for high security applications. For heavier service, the Glynn-Johnson 79 Series is an extra heavy duty surface overhead holder and stop, the DORMA 900 Series is a heavy duty stop and holder line, and the Sargent 690 is a heavy duty overhead concealed stop/holder with ANSI Grade 1 compliance if the concealed prep is to be kept.
3) What is the closest heavy duty alternative to the Rockwood OH203M concealed overhead stop?
The OH203M is a standard duty concealed multi function center hung stop recommended for medium traffic, medium weight doors. When the opening needs a heavier unit, the Glynn-Johnson 100 Series is a heavy duty concealed overhead door holder and stop that is multi-function and non-handed like the OH203M, and the Norton Rixson 1 Series Checkmate is a heavy duty concealed stop and holder rated Grade 1 with a 110 degree opening, the same maximum opening the OH203M provides. The Sargent 690 is another heavy duty overhead concealed stop/holder carrying ANSI Grade 1.
4) Which surface mounted overhead stops are alternatives to the Rockwood OH203M when the door cannot be prepped for a concealed unit?
The OH203M is a concealed mount unit and requires the door and frame to be morticed for it. Where surface mounting is the only option, the Glynn-Johnson 70 Series is a heavy duty surface overhead holder and stop with an 85 to 110 degree hold-open range, the Glynn-Johnson 79 Series is an extra heavy duty surface overhead holder and stop, and the Norton Rixson 10 Series Checkmate 10-346 is a surface stop and holder. The Norton Rixson 10-236 is a surface stop and holder with an adjustable hold-open feature.
5) Which concealed overhead stops are fire rated alternatives to the Rockwood OH203M?
The stop function of the OH203M is UL listed for fire door assemblies. The ABH 1000 Series is a heavy duty concealed mount overhead door stop with a fire rating, making it the closest peer for a fire door opening that needs a heavier unit than a standard duty stop.
6) Do I have to order a left hand and right hand version of the Rockwood OH203M?
No. The OH203M is non-handed, so one part number covers both swings, and it works on single acting or double acting doors. For a property manager stocking spares across a building, that means one unit on the shelf instead of a left and a right.
7) What screws come with the Rockwood OH203M and do they work in a hollow metal frame?
A complete screw packet for wood or metal door and frame is included. Jamb fasteners are #12-24 x 1/2 inch flat head machine screws for metal or #12 x 1-1/2 inch flat head wood screws; the door end takes #12-24 x 1-1/2 inch flat head machine screws or the same #12 x 1-1/2 inch wood screws. Machine screws mean you are tapping the hollow metal, so have the tap on the truck. In security areas Torx screws are available for the exposed fasteners.
8) What is the difference between a concealed overhead stop like the Rockwood OH203M and a surface mounted one?
A concealed unit like the OH203M mortises into the top rail of the door with the track hidden inside, so nothing shows when the door is closed. That prep has to be cut, which makes it a natural choice on new doors or when the door is already off. A surface overhead stop screws to the face of the top rail and the soffit of the frame with no mortise, so it retrofits an existing door in an afternoon at the cost of a visible arm. Surface options include the Glynn-Johnson 70 Series and 79 Series and the Norton Rixson 10 Series.
9) What else could I buy instead of the Rockwood OH203M standard duty concealed overhead stop?
Staying at the same duty level and mount, the Sargent 1530 is a concealed stop/holder with a 110 degree opening, and the Norton Rixson 10-336 is a standard duty overhead stop with adjustable opening control. The Don-Jo 3024 is a standard duty concealed stop in satin stainless for 36 inch doors, and the 3023 covers 30 inch doors. Glynn-Johnson's 410 Series sits a step up at medium duty concealed. Which one you pick usually comes down to matching what is already in the rest of the building.
10) What size channel does the Rockwood OH203M use and does it need a dedicated mortise in the door?
The OH203M runs a 3/4 inch square channel, and yes, that channel mortises into the top of the door with the arm concealed inside a slide track design. Cut the pocket to suit the 3/4 inch square section before hanging the door. On a hollow metal leaf without factory prep this is a shop or bench job, not something you want to be doing on a ladder.
11) The Rockwood OH203M ships as a stop. What if I need a dedicated hold open unit instead?
The OH203M is a multi-function unit shipped as a stop and converted to hold open or friction in the field using the included MF5012 adapter kit. If a factory hold open is preferred, the ABH 1000A Series and 1000RA Series are heavy duty concealed mount overhead stop and holder units with adjustable opening control, and the ABH 1000SA Series is likewise a heavy duty concealed stop and holder with adjustable opening control. The Glynn-Johnson 410 Series is a medium duty concealed overhead holder and stop.
12) What matches the satin stainless finish of the Rockwood OH203M on other overhead stops?
The OH203M is stainless steel and supplied in 630 satin stainless steel. Among concealed overhead stops, the Don-Jo 3023 and Don-Jo 3024 are both offered in satin stainless steel, sized for 30 inch and 36 inch doors respectively, which keeps the appearance consistent across a run of openings of differing widths.
13) What finish does the Rockwood OH203M come in and will it match my other stainless hardware?
Satin stainless steel, finish 630 (the same finish the industry also calls US32D). The unit is stainless steel throughout, not plated, so it holds up in exterior vestibules and wet or coastal locations better than a plated finish that can wear through at the arm. It sits alongside the satin stainless pulls, push plates, and hinges most commercial buildings are already standardized on.
14) Is the Rockwood OH203M a commercial product or is it meant for houses?
Commercial. Rockwood builds this line for institutional buildings, offices, retail, education, detention, sports facilities, hotels and restaurants, and higher end residences. For an MRO or institutional buyer standardizing a facility, the useful detail is that it is non-handed with a field-convertible function, so one line item covers stop and hold open openings across a floor.
How fast can I get the Rockwood ROC-OH203M-US32D delivered?
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Does the Rockwood ROC-OH203M-US32D come with a warranty?
Absolutely. The Rockwood ROC-OH203M-US32D is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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