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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:
- OH101S
- Product Category:
- Door Controls
- Product Substrate:
- Stainless Steel
- Department:
- Door Hardware
Rockwood ROC-OH101S-US32D – Frequently Asked Questions
1) What minimum door thickness does the Rockwood OH101S concealed overhead stop require?
The OH101S needs a door at least 1-3/4 inches thick, because the arm rides in a 1-3/16 inch square channel that has to be routed into the top edge of the door. Standard commercial 1-3/4 inch doors are fine. If your doors are thicker than 1-3/4 inches, note the actual thickness when you order so the unit is built to it. Thinner doors, like a 1-3/8 inch older interior leaf, are out.
2) Do I need to specify hand for a Rockwood OH101S overhead stop?
No handing to specify. The OH101S is non-handed, so one unit covers left and right openings, and it works on single acting and double acting doors. That is what makes it easy to stock one part number across a building rather than splitting inventory by hand.
3) How far does the Rockwood OH101S let the door open?
110 degrees maximum. Before it reaches the deadstop, a heavy shock absorber spring gives 5 to 7 degrees of compression, so the door decelerates instead of slamming into a hard stop. That cushion is the reason this style survives on doors that get kicked open. If your opening needs a shorter swing than 110 degrees, a concealed unit with adjustable opening control such as the ABH 1000RA or the Norton Rixson 10 Series with adjustable opening control is the direction to go.
4) What screws come with the Rockwood OH101S and do I need anything else to install it?
A complete screw packet ships with it, covering both wood and machine screws for door and frame. 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. Door fasteners are 5/16-18 x 1-1/2 inch flat head machine screws or #18 x 3 inch flat head wood screws. What you supply is the prep: the door edge channel and the frame soffit mortise. On security sensitive openings, Torx screws are available for the exposed fasteners.
5) Which concealed overhead stops can go on a fire rated door opening?
The stop function of the Rockwood OH101S is UL listed for fire door assemblies, and it is built to ANSI A156.8 under certification C01541. Among the concealed peers, the ABH 1000 Series is a heavy-duty concealed mount overhead door stop carrying a fire rating. For a fire rated opening always confirm the listing matches the door and frame label, since the door assembly rating governs which hardware is permitted on it.
6) What is the closest heavy duty concealed overhead stop to the Rockwood OH101S?
The Norton Rixson 1 Series Checkmate is the nearest match. It is a heavy duty concealed door stop and holder rated Grade 1, with a 110 degree opening - the same maximum opening angle the OH101S carries. The Sargent 690 is the other close peer: a heavy duty overhead concealed stop/holder built to ANSI Grade 1. Both are concealed mount like the OH101S, so the door and jamb prep is the same style of channel-and-arm installation rather than a surface applied bracket. The distinction to hold onto is function: the OH101S is a stop only, while the Rixson 1 Series and the Sargent 690 are stop and holder units that add a hold-open.
7) Is there a lighter duty concealed overhead stop for an interior office door that does not see heavy abuse?
Yes. The Rockwood OH101S is built for high traffic, heavy abuse installations, which is more stop than a low traffic interior door needs. The Glynn-Johnson 410 Series is a medium duty concealed overhead holder and stop, and the Sargent 1530 is a medium duty concealed mount stop/holder with a 110 degree opening. The Don-Jo 3023 and Don-Jo 3024 are standard duty concealed overhead stops in satin stainless steel, sized for 30 inch and 36 inch doors respectively. The DORMA 711F is a standard duty concealed friction stop for a 21 to 27 inch door opening. All remain concealed mount, so the door prep concept does not change.
8) What do I use instead of a concealed overhead stop when the door cannot be morticed for the channel?
Go surface mounted. The Rockwood OH101S needs a 1-3/16 inch square channel let into the door and a 1-3/4 inch minimum door thickness, which a thin or already-cut door may not accept. The Glynn-Johnson 70 Series is a heavy duty surface overhead holder and stop with an 85 to 110 degree hold-open range, and the Glynn-Johnson 79 Series is an extra heavy duty surface overhead holder and stop. On the Norton Rixson side, the 10 Series Checkmate surface stop and holder is offered as the 10-236 and the 10-346, and the 10-336 is a standard duty Grade 1 overhead stop with adjustable opening control. Surface units mount to the face of the door and the frame, so no channel is cut.
9) Concealed overhead stop or a surface mounted one, which should I use?
A concealed unit like the Rockwood OH101S mortises into the top of the door and the frame soffit, so nothing shows when the door is closed and there is nothing on the face for people to grab or vandalize. The trade off is prep: you have to machine a 1-3/16 inch square channel into the door edge, which means it is easiest on new doors or in a shop. Surface units mount to the door face and frame with no routing, so they retrofit existing doors fast. Glynn-Johnson 70 Series and 79 Series are the heavy duty surface alternatives if you cannot cut the door.
10) Is the Rockwood OH101S heavy enough for a school corridor or another high abuse opening?
That is exactly what it is built for. The OH100 Series concealed units are recommended for high traffic, heavy abuse installations, with a durable slider cam and shock block taking the hit and a heavy shock absorber spring cushioning the last 5 to 7 degrees. The body is stainless steel. For a low traffic office or closet door, a standard duty unit like the Don-Jo 3024 or the DORMA 711F friction stop is the lighter option.
11) Does the Rockwood OH101S meet ANSI standards for overhead stops?
The OH101S carries ANSI A156.8 with the type number C01541, which is the BHMA standard covering door controls and overhead stops and holders. Quote that A156.8 C01541 designation if a spec or submittal calls for an overhead stop by ANSI type.
12) Can I standardize the Rockwood OH101S across a whole building of doors?
It is a reasonable single SKU standard for commercial openings. Non-handed means no left and right split, single and double acting doors both work, the one 630 satin stainless finish matches typical commercial trim, and the slide track design is the same on every opening. The two constraints that decide it: every door has to be 1-3/4 inches or thicker and take a 1-3/16 inch square channel in the top edge, and no opening can need a hold open, since the OH101S is stop only.
13) Which overhead stop should I standardize on across a facility with a mix of door sizes?
The Rockwood OH101S is non-handed and works on single or double acting doors, which cuts the number of part numbers a facility has to stock. Some alternatives are sized per door width instead: the Don-Jo 3023 is for 30 inch doors and the Don-Jo 3024 for 36 inch doors, and the DORMA 711F covers a 21 to 27 inch door opening, so a mixed-width building means multiple SKUs. For a heavy duty concealed standard across an institutional facility, the Glynn-Johnson 100 Series is a heavy duty concealed overhead holder and stop described as multi-function and non-handed, and the DORMA 900 Series covers heavy duty stops and holders.
14) I need the opening angle set to something other than 110 degrees - what are my options?
The Rockwood OH101S opens to a 110 degree maximum. If the opening has to stop short of that, several peers control the angle in the field: the ABH 1000A Series is a concealed mount stop and holder with field-adjustable opening control, and the ABH 1000RA and ABH 1000SA Series carry adjustable opening control as well. The Norton Rixson 10-336 is an overhead stop with adjustable opening control, and the Glynn-Johnson 70 Series carries an 85 to 110 degree hold-open range. Adjustable models let one part number cover openings where a wall, a cabinet, or an adjacent door limits the swing.
15) What is the difference between the Rockwood OH101S and a friction stop like the DORMA 711F?
They solve the swing differently. The OH101S is a heavy duty concealed unit with a slide track design, a durable slider cam and shock block, and a heavy shock absorber spring that gives 5 to 7 degrees of compression before the deadstop takes the load - built for high traffic, heavy abuse openings. The DORMA 711F is a standard duty concealed friction stop covering a 21 to 27 inch door opening, where friction rather than a sprung deadstop governs the door. For an entry that gets slammed or a door in a corridor with wind load, the heavier sprung unit absorbs the energy the friction unit is not built to take.
16) For a detention or high abuse opening, is the Rockwood OH101S enough or should I go heavier?
The OH101S is recommended for high traffic, heavy abuse installations and uses a durable slider cam and shock block, with Torx screws available for exposed fasteners where security matters. If the opening warrants more, the Glynn-Johnson 79 Series is an extra heavy duty surface overhead holder and stop, which sits above the heavy duty class that the Glynn-Johnson 70 Series and the Glynn-Johnson 100 Series occupy. The tradeoff is mounting: the 79 Series is surface applied and visible on the door face, where the OH101S stays concealed in the top of the door and out of reach.
17) What finish does the Rockwood OH101S concealed stop come in?
One finish, 630 satin stainless steel, which is the standard commercial match for satin stainless pulls, push plates and hinges. Since the unit is stainless steel throughout rather than plated, the finish holds up in the wet and high wear spots where plated parts wear through.
18) Is the Rockwood OH101S suitable for a house, or is it commercial only?
It is a commercial rated part, and Rockwood hardware of this type turns up in institutional buildings, offices, retail, schools, detention, sports facilities, hotels and restaurants as well as higher end residences. On a home it only makes sense where the door is 1-3/4 inches thick and can be machined for the concealed channel, which rules out most standard interior residential doors.
19) Which stainless steel concealed overhead stops match a satin stainless finish on the rest of the door hardware?
The Rockwood OH101S is stainless steel and offered in 630 satin stainless steel, the finish most commercial openings are specified in. Among the concealed peers, the Don-Jo 3023 and Don-Jo 3024 are both offered in satin stainless steel, so a building already carrying satin stainless pulls, push plates, and hinges will read consistently whether the heavy duty or the standard duty unit goes in.
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Does the Rockwood ROC-OH101S-US32D come with a warranty?
Absolutely. The Rockwood ROC-OH101S-US32D is backed by a manufacturer’s warranty.
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