You may also like
ROCKWOOD OH100 Series Heavy Duty Concealed
Material: Stainless steel;
Finishes: US32D;
Fastner:
Jamb: 1/4 -20 x 3/4" FH MS or #14 x 1-1/2" FH WS
Door: 5/16-18 x 1-1/2" FH MS or #18 x 3" FH WS
Options:
- Doors may be single or double acting
- Non-handed
- Slide track design
- Recommended for high traffic, heavy abuse installations
- Heavy shock absorber spring provides 5-7° compression before deadstop
- Surface on/off knob on hold open models
- Complete screw packet for installation in wood and machine screws for door and frame
- For security areas, Torx® screws available for exposed fasteners.
- Durable slider cam and shock block
- 110° maximum opening
- 1-3/4" minimum door thickness, for thicker doors, note thickness when ordering
- 1-3/16" 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
- ANSI/BHMA:
- ANSI A156.8, C01541
- Commercial/Residential:
- Commercial
- Product Model:
- OH104S
- Product Category:
- Door Controls
- Product Substrate:
- Stainless Steel
- Department:
- Door Hardware
Rockwood ROC-OH104S-US32D – Frequently Asked Questions
1) What is the minimum door thickness for a concealed overhead stop like the Rockwood OH104S?
1-3/4 inches minimum, which is the standard commercial door thickness. Thicker doors are fine, but the thickness has to be called out when ordering so the unit is built for it.
2) Do I need to order the Rockwood OH104S left or right hand?
No handing to specify. The OH100 Series concealed stop is non-handed and works on single acting or double acting doors, so one part covers either swing direction.
3) Can I use the Rockwood OH104S on a fire rated door assembly?
The stop function is UL listed for fire door assemblies. Note that a hold-open function is not permitted on a fire door, and the OH104S is a stop-only unit with no hold open, so it suits fire rated openings.
4) How far will a door open with the Rockwood OH104S installed?
110 degrees maximum. The heavy shock absorber spring gives 5 to 7 degrees of compression before it reaches the deadstop, so the door decelerates instead of slamming into a hard stop. If you need the door to stand open, you need a stop and holder instead; this one is stop only.
5) What frame and door prep do I need for the Rockwood OH104S, and are screws included?
It is a concealed mount unit using a 1-3/16 inch square channel mortised into the top of the door, with the arm anchored to the jamb. A complete screw packet ships with it: jamb fasteners are 1/4-20 x 3/4 inch flat head machine screws or #14 x 1-1/2 inch flat head wood screws, and door fasteners are 5/16-18 x 1-1/2 inch flat head machine screws or #18 x 3 inch flat head wood screws. Torx screws are available for exposed fasteners in security areas.
6) What is the closest equivalent to the Rockwood OH104S concealed overhead stop from another manufacturer?
The Rockwood OH104S is a heavy duty concealed-mount overhead stop in stainless steel, non-handed, with a 110 degree maximum opening and the stop function UL listed for fire door assemblies. The closest cross-brand equivalents are the Norton Rixson 1 Series Checkmate, a heavy duty concealed door stop and holder with a 110 degree opening rated Grade 1, the Sargent 690 heavy duty overhead concealed door stop/holder with ANSI Grade 1 compliance, the Glynn-Johnson 100 Series heavy duty concealed overhead holders and stops, and the ABH 1000 Series heavy-duty concealed mount overhead door stop with fire rating. All four are concealed-mount heavy duty units like the OH104S.
7) I need a hold-open, not just a stop. What should I use instead of the Rockwood OH104S?
The Rockwood OH104S is a stop-only unit, so it deadstops the door without holding it open. For a concealed opening that needs hold-open, look at the ABH 1000A, 1000RA, or 1000SA Series, which are heavy-duty concealed mount stop and holder units with adjustable opening control, the Norton Rixson 1 Series Checkmate concealed stop and holder, the Sargent 690 concealed stop/holder, or the Glynn-Johnson 100 Series, which covers multiple functions in a concealed heavy duty body.
8) My door frame has no room to mortise a concealed stop. What surface-mounted option works instead of the Rockwood OH104S?
The Rockwood OH104S is a concealed-mount unit that requires channel prep in the door and a jamb bracket, so it will not work where the frame cannot be mortised. Surface-applied alternatives include the Glynn-Johnson 70 Series heavy duty surface overhead holders and stops with an 85 to 110 degree hold-open range, the Glynn-Johnson 79 Series extra heavy duty surface holders and stops, and the Norton Rixson 10 Series Checkmate surface stop and holder. These mount to the face of the door and frame rather than into a mortised channel.
9) Should I use a concealed overhead stop or a surface mounted one?
Concealed units like the Rockwood OH104S mortise into the top rail of the door, so nothing is visible when the door is closed. That takes door and frame prep, which is easy on new work and harder on an existing door. Surface overhead stops mount on the face of the door and the frame soffit with no mortising, so they retrofit faster but stay visible. If surface mount suits the job better, the Glynn-Johnson 70 Series is a heavy duty surface option and the 79 Series is extra heavy duty.
10) Does the Rockwood OH104S meet ANSI/BHMA requirements for door stops?
It is certified to ANSI A156.8, the standard covering overhead stops and holders, under designation C01541. That is the reference a spec writer or institutional buyer needs for a submittal.
11) Is there a lighter duty concealed overhead stop if the door is not high traffic?
The Rockwood OH104S is built for high traffic, heavy abuse installations. For a lighter opening, the Glynn-Johnson 410 Series is a medium duty concealed overhead holder and stop, the Sargent 1530 is a medium duty concealed mount stop/holder with a 110 degree opening, the DORMA 711F is a standard duty concealed friction stop, and the Don-Jo 3023 and 3024 are standard duty concealed overhead stops in satin stainless steel sized for 30 inch and 36 inch doors respectively.
12) Are the Norton Rixson 10 Series stops a substitute for the Rockwood OH104S?
They are not a direct swap. The Rockwood OH104S is a concealed mount overhead stop that sits in a mortised channel in the door. The Norton Rixson 10 Series units, including the 10-236 and 10-346 Checkmate models and the 10-336 with adjustable opening control, are surface-mounted, so they use entirely different door and frame prep and are rated medium or standard duty rather than heavy duty. For a concealed heavy duty replacement, the Rixson 1 Series Checkmate is the closer match.
13) What finish and material is the Rockwood OH104S overhead stop?
Stainless steel construction in 630 satin stainless, which Rockwood catalogues as US32D. That matches the satin stainless trim, push plates, and pulls already on most institutional openings, so it standardizes cleanly across a building.
14) What heavy duty stop should I standardize on across a facility if some doors are concealed-prep and some are not?
A mixed facility can be standardized on one manufacturer family rather than one part. The Rockwood OH104S covers concealed openings in stainless steel, non-handed, for high traffic and heavy abuse. For the surface-applied doors in the same building, the Glynn-Johnson 70 Series and the extra heavy duty 79 Series are surface overhead holders and stops, while the Glynn-Johnson 100 Series and DORMA 900 Series heavy duty stops and holders cover the concealed and heavy duty side, letting you hold one line across both prep types.
How fast can I get the Rockwood ROC-OH104S-US32D delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
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-OH104S-US32D come with a warranty?
Absolutely. The Rockwood ROC-OH104S-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-OH104S-US32D?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Rockwood ROC-OH104S-US32D from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.