ABH A135HD Heavy Duty Aluminum...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$175.00
$171.97
ABH A135HD Heavy Duty Aluminum Continuous Gear Hinge with Safety Design

ABH A135HD Heavy Duty Aluminum Continuous Gear Hinge with Safety Design

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Model: A135 HD C 079
$175.00
$171.97
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$175.00
$171.97
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ABH A135HD Heavy Duty Aluminum Continuous Gear Hinge with Safety Design

Professional Full Mortise Continuous Hinge for Safety-Critical Applications

The ABH A135HD Heavy Duty Aluminum Continuous Gear Hinge delivers professional-grade performance with full concealed design and 1/8" door inset configuration. This BHMA Grade 1 certified hinge features a unique 9/16" gap between frame leaf and door leaf when closed, providing essential safety protection in schools, nursing homes, and daycare facilities. Available in standard lengths of 79", 83", 85", 95", and 120" with fire ratings up to 90 minutes for metal doors and 60 minutes for wood doors.

Professional Features & Benefits

  • Safety Design Protection: 9/16" gap between frame and door leaves prevents fingers and objects from being caught in the door closure, ideal for schools, nursing homes, and daycare facilities.
  • Heavy-Duty Construction: 83" hinge features 32 bearings with 3" spacing on center for smooth operation and long-term durability in high-traffic applications.
  • Fire Rating Compliance: Approved for metal swinging fire doors up to 90 minutes and wood swinging fire doors up to 60 minutes for code compliance.
  • Full Concealed Design: Eliminates gaps between door and frame to prevent prying while providing enhanced security and clean appearance.
  • Weight Distribution Engineering: Continuous design distributes door weight evenly throughout the entire door and frame, preventing common alignment problems like binding and sagging.
  • Surface Application: No mortising of door or frame required, and will cover old butt hinge cut-outs for retrofit applications.
  • BHMA Grade 1 Certification: Meets BHMA 156.25 Grade 1 standards for commercial-grade performance and reliability.
  • Anodized Finish Quality: Anodized after machining in clear, dark bronze, and black finishes for superior corrosion resistance and appearance.

Technical Specifications

  • BAA Qualified: Yes
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Door Weight: 450
  • Fasteners: 12-24 X 3/4" undercut self drilling, thread forming tek machine screws
  • Hinge Type: Full Mortise
  • Keyed: N/A
  • Keyed Function: N/A
  • PDF:A135HD Aluminum Continuous Gear Hinges Full Mortise: https://zensupply.com/content/pdf/abh/0002649_a135_alum_geared_hinge.pdf
  • PDF:A135HD Aluminum Continuous Gear Hinges Full Mortise: https://zensupply.com/content/pdf/abh/0002459_a135_aluminum_geared_hinge_00.pdf
  • PDF:Aluminum Continuous Geared Hinge Door Clearance Chart: https://zensupply.com/content/pdf/abh/0000383_aluminum_cont_geared_hinge_door_clearance_chart_squared_edged_pg6_rev.pdf
  • PDF:BHMA GRADE 1: https://zensupply.com/content/pdf/abh/0002339_bhma_grade_1_for_hinges_compressed.pdf
  • Product Category: Door Hinges and Pivots
  • Product Group: Door Hinges and Pivots
  • Product Model: A135HD
  • Product Subgroup: Continuous Hinges
  • Product Type: Continuous Hinges
  • Series: A135 Series
  • Subcategory: Full Mortise Hinges

Professional Applications

  • Educational Facilities and Schools
  • Healthcare Institutions and Nursing Homes
  • Daycare and Childcare Facilities
  • Commercial Office Buildings
  • Government and Municipal Buildings
  • Fire-Rated Door Applications
  • High-Traffic Commercial Entrances

Why Choose ABH Quality?

ABH A135HD continuous hinges deliver professional-grade reliability with heavy-duty aluminum construction and BHMA Grade 1 certification for demanding commercial applications. The anodized-after-machining finish process ensures superior corrosion resistance and long-term appearance retention. Engineered for safety-critical environments where dependable performance and finger protection are essential.

Product Specs

Product Group:
Door Hinges and Pivots
Door Weight:
450
Fasteners:
12-24 X 3/4" undercut self drilling, thread forming tek machine screws
Product Subgroup:
Continuous Hinges
Product Type:
Continuous Hinges
Subcategory:
Full Mortise Hinges
Commercial/Residential:
Commercial
Hinge Type:
Full Mortise
Keyed:
N/A
Keyed Function:
N/A
Series:
A135 Series
BAA Qualified:
Yes
Product Model:
A135HD
Product Category:
Door Hinges and Pivots
Department:
Door Hardware

ABH A135 HD C 079 – Frequently Asked Questions

1) Will the ABH A135HD continuous hinge hold a heavy 450 lb door?
The A135HD full mortise geared hinge is rated for doors up to 450 pounds. Because a continuous hinge runs the full height of the opening, the load is spread down the whole door and frame rather than concentrated at three or four butt locations, which is what keeps a heavy leaf from sagging or binding over time. For a high traffic entrance or a thick fire door, that rating and that load path are the reason to go continuous instead of butts.
2) What is the 9/16 inch gap on the ABH A135HD safety hinge for?
That gap sits between the frame leaf and the door leaf when the door is closed, on the hinge side. The hinge side of a door is where fingers get crushed, because the closing gap there goes to zero. Holding it at 9/16 inch means a child's or a resident's fingers can't be pinched off in the closure. It is the reason this model goes on classroom doors, daycare rooms, and nursing home doors rather than the plain geared hinge.
3) Is the ABH A135HD fire rated, and for how long?
Yes. On metal swinging fire doors it is approved to 90 minutes; on wood swinging fire doors, 60 minutes. If the opening on your drawing calls for a 90 minute wood door, this is not the hinge for it. It also carries BHMA 156.25 Grade 1, which is the top commercial grade for continuous hinges.
4) What length ABH A135HD hinge do I need for a 7 foot door?
Five lengths are made: 79, 83, 85, 95, and 120 inches. A standard 7 foot (84 inch) commercial door normally takes the 83 inch hinge, which is the common stock length and the one built with 32 bearings at 3 inch spacing on center. The 95 and 120 inch lengths cover tall openings, and continuous geared hinges of this type are routinely cut down on site to suit a shorter leaf.
5) Do I have to mortise the door and frame to install the ABH A135HD?
No mortising of the door or frame is needed. It goes on with 12-24 x 3/4 inch undercut self drilling, thread forming tek machine screws, so you are drilling and driving rather than routing. On a retrofit it will cover the old butt hinge cutouts, which is the usual reason a property manager picks a continuous hinge for a door that has been rehung too many times and no longer holds screws in the butt locations.
6) What does the 1/8 inch door inset on the A135HD mean, and does it match my door?
Inset is the clearance between the door edge and the frame stop on the hinge side, and a geared continuous hinge is built for one specific inset. Every A135HD is a 1/8 inch inset hinge. If your existing opening is prepped for a different inset, the hinge won't sit right, so measure the gap before ordering. For a 3/32 inch inset opening, the BEST 663HD heavy duty continuous hinge is built for that dimension instead, and the NGP HD5700 full surface hinge is a 1/16 inch inset device.
7) What is the closest equivalent to the ABH A135HD from another brand for a full mortise geared continuous hinge?
The ABH A135HD is a heavy duty full mortise aluminum continuous geared hinge. The nearest peers by construction and mounting are the Design Hardware FMHD Full Mortise heavy duty continuous geared hinge and the Pemko FM-RG Series Grade 1 aluminum full mortise raised geared continuous hinge with 180 degree swing. All three mount full mortise between the door and frame rather than on the face of the door, so an opening prepped for the A135HD accepts the same mounting approach.
8) Which continuous hinges carry Grade 1 like the ABH A135HD?
The ABH A135HD is certified to BHMA 156.25 Grade 1. Among comparable continuous hinges, the Pemko CFM84SLF-HD1 84 inch full mortise short leaf flush heavy duty hinge, the Pemko FM-RG Series raised geared hinge, the Pemko FM-SLF short leaf flush geared hinge for 1-3/8 inch doors, and the Pemko DSH1000 anti-barricade hinge are all Grade 1. The NGP HD1100A concealed continuous geared hinge is Grade 3, so it is a different certification tier if your specification calls out Grade 1.
9) Is a BEST 641 or 651 continuous hinge the same thing as the ABH A135HD?
They are not interchangeable in duty class. The BEST 641 steel full mortise continuous hinge with hospital tips and the BEST 651 stainless steel full mortise continuous hinge with hospital tips are both medium duty. The ABH A135HD is a heavy duty aluminum geared hinge rated to a 450 pound door. If the opening was specified for a heavy duty geared hinge, the heavy duty peers are the Design Hardware FMHD full mortise or the BEST 663HD.
10) For a school or behavioral health opening, is the ABH A135HD the right continuous hinge or is there a purpose-built alternative?
The ABH A135HD carries a 9/16 inch gap between the frame leaf and door leaf when closed to keep fingers and objects out of the closing edge, which is why it is specified in schools, nursing homes, and daycare facilities. If the concern is a door being barricaded shut rather than pinched fingers, the Pemko DSH1000 anti-barricade continuous hinge with 100 degree bidirectional operation is Grade 1 and is designed for that swing behavior. The two address different risks at the opening.
11) Which continuous hinges are 90 minute fire rated on hollow metal doors besides the ABH A135HD?
The ABH A135HD is approved for metal swinging fire doors up to 90 minutes and wood swinging fire doors up to 60 minutes. Peers carrying a 90 minute rating include the NGP HD1100A concealed geared hinge, the NGP HD5400A half surface geared hinge, and the NGP HD5700 full surface geared hinge, each listed 10C fire rated 90 minute on hollow metal, plus the BEST 663HD and BEST 664HD, both 90 minute UL fire rated.
12) Full mortise or full surface continuous hinge, which one should I order?
Full mortise, like the A135HD, sets into the gap between the door edge and the frame rabbet and stays hidden when the door is closed, so there is nothing to pry at and the look is clean. Full surface mounts on the face of the door and the face of the frame, which is what you want when the frame is out of square, badly worn, or you cannot get clean bearing in the rabbet. If the opening needs full surface, the Design Hardware FSHD or the BEST 664HD covers it in heavy duty, and the Design Hardware FSOHD is the offset version for doors that swing clear.
13) What finishes does the ABH A135HD come in, and will it match my other aluminum doors?
Three: clear anodized aluminum, dark bronze, and black. All three are anodized after machining, so the cut edges and gear teeth are coated too rather than left raw, which is what keeps the finish from breaking down at the exposed edge on an exterior opening. Clear anodized matches standard aluminum storefront, and dark bronze matches the usual bronze anodized entrance. Each of the three is offered in all five lengths.
14) Does the ABH A135HD meet Buy American requirements for a government job?
Yes, the A135HD is BAA qualified, which is what a federal or municipal specification is usually asking for on a hardware submittal. It is also a commercial grade product, BHMA 156.25 Grade 1, which is the grade most institutional specs call out for continuous hinges.
15) What is a Grade 1 alternative to the ABH A135HD full mortise continuous hinge?
Staying full mortise and Grade 1, the Pemko FM-RG Series is an aluminum full mortise raised geared hinge with a 180 degree swing, and the Pemko CFM84SLF-HD1 is an 84 inch short leaf flush heavy duty version. For a 1-3/8 inch door, Pemko's short leaf flush geared hinge is the one built for that thickness. Where the opening is a behavioral health or detention type room, the Pemko DSH1000 anti barricade hinge with 100 degree bidirectional operation does a different job entirely, letting the door swing both ways so a room cannot be blocked from inside.
16) Is a standard duty continuous hinge enough, or do I need the heavy duty A135HD?
Duty level tracks door weight and cycle count. The A135HD is the heavy duty build, rated to a 450 pound door, and that is what a high traffic commercial entrance or a heavy fire rated leaf needs. For an interior door in a lighter application, medium duty is a step down worth considering: the BEST 641 steel and BEST 651 stainless steel full mortise continuous hinges are both medium duty and come with hospital tips, which is the closed top and bottom cap that stops dirt collecting on the hinge in a healthcare corridor.
17) My frame is out of square and the door binds. Is there a continuous hinge better suited than a standard full mortise model?
For an out-of-square or previously patched opening, the Design Hardware FSOHD full surface offset heavy duty continuous geared hinge mounts to the door and frame faces with an offset leaf, which suits conditions where the ABH A135HD full mortise mounting between door and frame is not workable. The BEST 664HD full surface heavy duty geared hinge is another face-mounted option in the same duty class.
18) What is the difference between the ABH A135HD and the NGP HD5400A half surface hinge?
The ABH A135HD is a full mortise aluminum geared hinge, set between the door and frame with a 1/8 inch inset. The NGP HD5400A is an 83 inch half surface continuous geared hinge of aluminum alloy construction, rated 10C fire rated 90 minute on hollow metal, and it mounts with one leaf on the door face rather than fully between door and frame. The mounting method is what decides which one your opening takes.
19) Can I standardize a whole building on one continuous hinge if some doors are full mortise and some cannot be mortised?
You can standardize on one family rather than one part. The ABH A135HD covers the full mortise openings at 1/8 inch inset in 79, 83, 85, 95, and 120 inch lengths. The Design Hardware line runs the same duty class across mounting types: FMHD full mortise, FSHD full surface, and FSOHD full surface offset, all heavy duty continuous geared hinges. That lets one duty class carry the building while the mounting style follows the condition at each opening.
20) The opening needs a 180 degree swing. Does the ABH A135HD suit it or is there a better geared hinge?
If the swing requirement is called out on the drawing, the Pemko FM-RG Series Grade 1 aluminum full mortise raised geared continuous hinge is specified with a 180 degree swing and mounts full mortise like the ABH A135HD, so it drops into the same style of prep. The A135HD is a full concealed full mortise design built around a 9/16 inch safety gap between the frame leaf and door leaf, which is the reason it gets picked where finger protection drives the choice.
21) Will a continuous geared hinge stop someone prying the hinge side of the door open?
The A135HD is a full concealed design: with the door closed, the hinge fills the gap between door and frame down the entire height, so there is no exposed knuckle or pin and no gap to get a bar into. Butt hinges leave three or four points and open space between them. That continuous coverage, plus the fact that the leaves are through fastened rather than relying on a removable pin, is what makes the hinge edge a non target on an exterior or after hours opening.
22) Can I use the ABH A135HD on a wood door?
Yes, on wood swinging fire doors it is approved up to 60 minutes. The screws supplied are 12-24 x 3/4 inch self drilling thread forming tek machine screws, which are cut for metal, so a wood door installation needs the correct wood application fasteners for the leaf. On a hollow metal door the supplied tek screws drill and form their own thread, no tapping needed.
How fast can I get the ABH A135 HD C 079 delivered?
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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 ABH A135 HD C 079 come with a warranty?
Absolutely. The ABH A135 HD C 079 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 ABH A135 HD C 079?
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