Dorma STA8956 Surface Mounted ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,155.00
$807.09
Dormakaba Dorma STA8956 Surface Mounted Door Closer, Adjustable Size 5-6 DOR-STA8956

Dorma STA8956 Surface Mounted Door Closer, Adjustable Size 5-6

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Model: STA-8956-ARP-FC-SN1-693
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Corrosion-resistant Door Closers

The STA Series surface closers combine the versatility and flexibility of the 8900 or 8600 Seeries with maximum corrosion-resistance. Ideal for use in severe climate conditions, or where there is exposure to corrosive environments.

Door closer ANSI/BHMA Grade 1 certified.

  • Ideal for corrosive environments
  • Backcheck standard
  • Non-handed for regular, top jamb & parallel arm applications
  • Adjustable spring sizes

CLOSER FUNCTIONS

  • Adjustable power.
  • Adjustable backcheck intensity.
  • Adjustable backcheck positioning.
  • Adjustable sweep speed.
  • Adjustable latch speed.
  • Optional delayed closing from maximum opening angle to approximately 70°

RECOMMENDED APPLICATIONS 

Recommended applications include seashore and swimming pool areas, offshore oil rigs, ships, chemical plants, sewage treatment facilities, or anywhere rust and corrosion present a problem.

ADJUSTABLE SPRING SIZES AVAILABLE

  • The STA 8900 Series: spring sizes 1-6 and 5-6 +50%.
  • The STA 8600 Series: spring size 1-6.

DOWNLOADS

Dorma STA 8900 Architechtural Document

Dorma STA 8900 Instruction Sheet

Dorma STA Technical Brochure

Dorma STA 8900 REG

Dorma STA 8900 PA

Dorma STA 8900 TJ

Manufacturer Resources

Product Specs

Subcategory:
Surface Mounted Closers
Product Group:
Door Controls
Series:
STA Series
Grade:
Grade 1
Duty Level:
Heavy Duty
ADA Compliant:
Yes
Warranty:
25 Year
Product Subgroup:
Door Closers - Surface Mounted
Product Type:
Surface Mounted Door Closers
Commercial/Residential:
Commercial
Closer Size:
5 to 6
Product Model:
STA8956
Door Hand Direction:
Non-Handed
Product Category:
Door Controls
Product Substrate:
Aluminum
Department:
Door Hardware

Dormakaba STA-8956-ARP-FC-SN1-693 – Frequently Asked Questions

1) Will a Dorma STA8956 door closer hold up on a pool deck or a coastal building where other closers rust out?
That is exactly what the STA Series is built for. It takes the STA 8900/8600 closer platform and adds maximum corrosion resistance, with Dorma naming seashore and swimming pool areas, offshore oil rigs, ships, chemical plants and sewage treatment facilities as the intended applications. The body substrate is aluminum. If rust and pitting on the closer body and arm is why you are replacing the current unit, a standard cast iron or painted steel closer will fail the same way again.
2) Is the STA8956 closer strong enough for a heavy exterior door?
The STA8956 is the adjustable size 5 to 6 spring version, which is the high end of the range and rated heavy duty for commercial use. Sizes 5 and 6 are what you specify for wide or heavy exterior openings that see wind load. If you are doing an interior office door or a light storefront leaf, this closer will be over-powered for it and you want the size 1-6 adjustable version of the STA 8900 instead.
3) Do I have to order a left hand or right hand Dorma STA8956?
No handing to specify. The STA8956 is non-handed and mounts regular arm, top jamb, or parallel arm, so one unit covers either swing. What you do have to decide is which side of the door it lands on: pull side regular arm, push side parallel arm, or on the frame face top jamb. Confirm which of those the opening allows before you set the mounting template.
4) Does the Dorma STA8956 meet ADA opening force requirements?
Yes, the STA8956 is ADA compliant and carries ANSI/BHMA Grade 1 certification. Because the spring power is field adjustable across sizes 5 and 6, you can dial the closing force down at the door to hit the opening force your inspector is measuring, rather than swapping the unit.
5) What else could I use instead of the Dorma STA8956 for a heavy commercial door?
If corrosion is not the driver and you just need Grade 1 heavy duty spring power, the BEST EHD9000 Series covers adjustable spring sizes 1 through 6, the Sargent 1431 Powerglide is a Grade 1 heavy duty surface closer, and the LCN 1460T is a heavy duty Grade 1 unit in a powder coat finish. All three are conventional heavy duty closers. None of them is offered here as a corrosion-resistant unit the way the STA Series is, so for a pool room, a coastal entry or a treatment plant, stay with the STA.
6) What is the closest equivalent to a Dorma STA8956 door closer from another manufacturer?
The Dorma STA8956 is a heavy duty, ANSI/BHMA Grade 1, non-handed surface mounted closer with an aluminum body and adjustable spring power in the size 5 to 6 range. The closest peers on the same duty and grade footing are the BEST EHD9000, an extra heavy-duty Grade 1 surface closer with adjustable spring sizes 1-6, the BEST HD8000, a heavy duty Grade 1 surface closer, the Sargent 1431 Powerglide heavy-duty surface closer at Grade 1, and the Falcon SC71A heavy-duty surface closer at Grade 1. Where the STA8956 differs from all of them is its purpose: the STA construction is built for corrosion resistance in seashore, pool, chemical plant and sewage treatment environments, so the peers match the power class rather than the environment.
7) I need a heavy duty Grade 1 closer but the door is interior and dry - what should I use instead of the STA8956?
The STA8956 spends its cost on corrosion resistance for severe and corrosive environments, which an interior lobby or corridor door does not need. For a dry interior opening at the same heavy duty, Grade 1 class, the BEST HD8000 heavy duty Grade 1 surface closer, the Sargent 281 Powerglide cast iron heavy-duty closer at Grade 1, the Falcon SC71A heavy-duty surface closer at Grade 1, and the LCN 1460T heavy duty Grade 1 commercial closer all cover the same duty level. If the door is lighter traffic, the Sargent 1131 and Sargent 1331 are Grade 1 at medium duty.
8) I need the door to stay open - does the STA8956 do that, or do I need a different closer?
The STA8956 is offered with AR and ARP round form non-hold open arms, and its optional feature is delayed closing from maximum opening angle to approximately 70 degrees, which slows the door rather than holding it. If the opening genuinely needs to stand open, go to a closer built with a hold open arm: the Accentra 51 Series is a tri-packed hold open arm closer with adjustable size 1-6, the Orca Hardware BHDC1958HO/PA is a hold open closer with a parallel bracket, and the Stanley Security A45-501HL uses a long hold open arm as standard in top jamb mounting. Delayed action, which is the nearest behavior to the STA option, is what the Orca BHDC1958DA/PA and BHDC2011DA/PA provide.
9) Can I use a Cal-Royal 400 Series in place of a Dorma STA8956?
Not on a Grade 1 spec. The Cal-Royal 400 Series is a Grade 2 commercial hydraulic door closer, while the STA8956 is ANSI/BHMA Grade 1 certified and heavy duty. If a Cal-Royal is what you want on the opening, the Grade 1 units in that line are the 500S barrier free closer with adjustable back-check, the 700S dual valve sized closer with adjustable tube arm, and the N900PBF barrier free Grade 1 hydraulic surface closer.
10) For an aluminum storefront entrance, is the STA8956 the right closer or is there a better match?
The STA8956 has an aluminum body, is non-handed for regular, top jamb and parallel arm applications, and carries backcheck as standard, which suits a storefront leaf and is the right call when that entrance is near salt air or a pool deck. For a storefront in an ordinary climate, the Norton Rixson 1600 Series aluminum storefront closer with tri-style mounting is heavy duty and Grade 1 and is built specifically for that frame, and the Norton Rixson 1601P is a Grade 1 tri-mount surface closer with 180 degree swing at medium duty where the door has to swing back to a wall.
11) What is the difference between the AR and ARP arm on the Dorma STA closer?
Both are round form non-hold-open arms. AR is the regular arm for pull side mounting, ARP is the parallel arm version for push side mounting where the door swings away from you and the closer sits on the door face under the frame. Pick by which side of the opening you can put the closer on. Neither one holds the door open, so if you need the door to stand open at a set angle, this is not the arm to order.
12) Can I stop the door from slamming into the adjacent wall with the STA8956?
Backcheck is standard on the STA Series, and both the intensity and the position where it kicks in are adjustable, so you can cushion the swing before the door reaches a wall or a railing. Sweep speed and latch speed are separately adjustable as well, which is what you use to get the door closed against wind without it banging the frame.
13) Can I get a Dorma STA door closer that holds the door open for a delay?
Delayed closing is an option on the STA closer, holding the door from its maximum opening angle to roughly 70 degrees before the normal sweep takes over. That is what you want on a door people push carts or gurneys through. It is a closing function, not a mechanical hold open, and it has to be specified on the order.
14) I need a hold open closer, not a non-hold-open one. What should I look at?
The STA8956 ships with round form non-hold-open arms only, in both AR and ARP. For a mechanical hold open, the Accentra 51 Series is a tri-packed hold open arm closer with adjustable size 1 through 6, and the Orca BHDC1958 HO/PA is a hold open closer with a parallel bracket. Note neither is a corrosion-resistant unit, so on an exterior coastal or pool opening you are trading rust protection for the hold open feature.
15) Is the Dorma STA8956 a light duty closer suitable for interior office doors?
No. It is a heavy duty commercial closer at spring sizes 5 to 6, which is more power than an interior office leaf needs and will make the door hard to pull. For lighter interior openings, the Arrow DC314 and the Arrow DCN314 are Grade 1 light duty surface closers, the BEST SL6000 Series is a Grade 1 light duty unit, and the BEST HD7000 Series is medium duty Grade 1.
16) Can I standardize a whole facility on the STA closer if the doors vary in size?
Partly. Because it is non-handed and mounts three ways, one part number covers left and right swings and pull, push or frame mounting across a building. The spring range is the limit: the STA8956 adjusts within sizes 5 to 6 only. For lighter doors in the same facility, the STA 8900 Series is offered in a 1 to 6 spring range and the STA 8600 Series in size 1 to 6, so you can hold the same series and finish across every opening while matching power to each door.
17) The STA8956 is more closer than my door needs - is there a lighter Grade 1 surface closer?
The STA8956 is a heavy duty unit set up for spring sizes 5 to 6, which suits wide or heavy exterior leaves. For a narrower interior door, the BEST SL6000 is a light duty Grade 1 surface closer with adjustable spring sizes, the Norton Rixson 160 Series is a light duty Grade 1 light commercial closer, the Arrow DC314 is a light duty Grade 1 surface closer, and the Falcon SC61A is a Grade 1 light to medium duty cast aluminum closer. The Falcon SC91A is a light duty unit at Grade 3 rather than Grade 1, so check what your spec calls for before swapping to it.
18) Which closers cover a wider spring size range than a Dorma STA8956?
The STA8956 is set up for adjustable spring sizes 5 to 6, so it is the high-power end of the STA family rather than a full-range unit. If one part number needs to cover both light interior doors and heavy exterior leaves across a building, the BEST EHD9000 adjusts across spring sizes 1-6, the Accentra 2701 covers adjustable spring sizes 1-6, the Arrow DCN325 is a Grade 1 surface closer adjustable from size 1 to 6, the Imperial USA TC4300 is a heavy duty size 1-6 ADA closer, and the Norton Rixson 8501A is a Grade 1 tri-mount closer with an adjustable size 1-6 spring. The trade is that none of those are described as the corrosion-resistant construction the STA carries.
19) What closer should I use if the arm has to mount on the pull side with a slide track instead of a projecting arm?
The STA8956 ships with AR or ARP round form arms and is non-handed for regular, top jamb and parallel arm applications, all of which are projecting arm mountings. For a track application, the Corbin Russwin DC5230 is a Grade 1 surface closer with a slide track arm as standard in pull side mounting. Within projecting arms, the Corbin Russwin DC6200 and DC8200 are Grade 1 surface closers with a double lever regular arm in pull side mounting, and the DC3200 is a Grade 1 regular arm surface closer.
20) Is an Arrow DCN500DP parallel drop plate an alternative to a Dorma STA8956 closer?
No. The Arrow DCN500DP is a parallel drop plate for the DCN500, a mounting bracket rather than a closer body, so it cannot replace anything. The STA8956 is the closer itself, a Grade 1 heavy duty surface mounted unit with adjustable power, backcheck intensity and positioning, sweep speed and latch speed. The same caution applies to two other items that turn up next to closers: the Stanley Security 327 and 341 are wardrobe pivots for hanging doors, not closing devices.
21) Which alternatives to the STA8956 are also ADA compliant for a barrier free opening?
The STA8956 is ADA compliant and Grade 1 with adjustable spring power, which is what lets the opening force be tuned to the accessibility requirement. Peers stated as barrier free or ADA include the Cal-Royal 500S Grade 1 barrier free closer with adjustable back-check, the Cal-Royal N900PBF barrier free Grade 1 hydraulic surface closer, the Calibre CA9901 tri-pack arm size 2-5 ADA closer at Grade 1, the Calibre CA4001 adjustable spring tension ADA hydraulic closer at Grade 1, the Imperial USA TC4300 heavy duty size 1-6 ADA closer, and the LCN 1250 light duty closer in sizes 1-5 with all-weather fluid.
22) Is a Deltana DC70 the same kind of closer as a Dorma STA8956?
They are not on the same footing for a commercial spec. The STA8956 is a commercial, heavy duty, ANSI/BHMA Grade 1 certified surface closer with adjustable backcheck intensity and positioning and corrosion-resistant construction. The Deltana DC70, along with the DC10, DC40 and DC50, is a door closer offered by series designation without a stated Grade 1 heavy duty commercial classification behind it. On an opening where the drawing calls out Grade 1, stay with a peer that states it, such as the BEST HD8000 or the Sargent 1431.
23) I am standardizing one closer across a facility with both light and heavy doors - does the STA8956 do that or do I need two part numbers?
The STA8956 is adjustable across spring sizes 5 to 6, so it standardizes the heavy end of a building rather than the whole range. Two-part-number approaches are common: pair it with a light duty Grade 1 unit such as the BEST SL6000 or the Arrow DC314 for interior doors. If a single adjustable part number across the building matters more than corrosion resistance, the BEST EHD9000 at spring sizes 1-6, the Accentra 2701 at sizes 1-6, and the Design Hardware 116 Series heavy duty tri-packed non-hold open closer are the ones to look at.
24) What finishes does the Dorma STA8956 closer come in?
Seven finishes across both arm types: 689 aluminum, 690 dark bronze, 691 light bronze, 693 black, 695 dark bronze, 696 satin brass and 630 satin stainless. On a corrosive site, 630 satin stainless and the darker painted finishes are the usual picks for matching existing exterior hardware across a building. Every finish is offered with both the AR and the ARP arm.
25) I need a closer with a cover for a visible opening - which ones come with one?
The STA8956 is supplied in seven architectural finishes including 689 aluminum, 690 dark bronze, 691 light bronze, 693 black, 695 dark bronze, 696 satin brass and 630 satin stainless, so it is already finished for exposed work. Among peers, the Design Hardware 316 Series is a heavy duty closer supplied with a cover, and the Dexter DCH1000 is a Grade 1 tri mount surface closer with a full cover. Going the other way, the Arrow DCN314 and DCN325 are less cover units, so a back-of-house or mechanical door is where those fit.
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Does the Dormakaba STA-8956-ARP-FC-SN1-693 come with a warranty?
Absolutely. The Dormakaba STA-8956-ARP-FC-SN1-693 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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