ABH A280HD/A280LL Aluminum Con...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$175.00
$171.97
ABH A280HD/A280LL Aluminum Continuous Geared Hinge - Heavy Duty Full Mortise for 1-3/4" Doors

ABH A280HD/A280LL Aluminum Continuous Geared Hinge - Heavy Duty Full Mortise for 1-3/4" Doors

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Model: A280 HD C 079
$175.00
$171.97
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$175.00
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ABH A280HD/A280LL Aluminum Continuous Geared Hinge - Heavy Duty Full Mortise for 1-3/4" Doors

Professional Heavy-Duty Continuous Hinge Solution

The ABH A280HD/A280LL Aluminum Continuous Geared Hinge delivers professional-grade performance for 1-3/4" thick doors with full concealed, heavy-duty construction. Designed to support door weights up to 450 lbs (A280HD) or 1,000 lbs (A280LL lead-lined model), this BHMA Grade 1 certified hinge provides continuous frame reinforcement and eliminates common alignment problems. Available in standard lengths of 79", 83", 85", 95" and 120" with anodized aluminum construction for lasting durability.

Professional Features & Benefits

  • Heavy-Duty Weight Capacity: Supports doors up to 450 lbs (A280HD) or 1,000 lbs (A280LL lead-lined model) for demanding commercial applications.
  • Door Thickness Compatibility: Engineered specifically for 1-3/4" thick doors with full mortise installation.
  • Standard Length Options: Available in 79", 83", 85", 95" and 120" lengths to accommodate various door heights.
  • BHMA Grade 1 Certification: Meets BHMA 156.25 Grade 1 standards for commercial-grade reliability and performance.
  • Fire Rating Compliance: Approved for metal swinging fire doors up to 90 minutes and wood swinging fire doors up to 60 minutes.
  • Enhanced Security Design: Eliminates gaps between door and frame, preventing prying attempts while providing continuous reinforcement.
  • Surface Applied Installation: No mortising of door or frame required, simplifying installation and covering old butt hinge cut-outs.
  • Professional Fasteners: Includes 12-24 X 3/4" undercut self drilling, thread forming tek machine screws for secure mounting.

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
  • Keyed: N/A
  • Keyed Function: N/A
  • Product Category: Door Hinges and Pivots
  • Product Group: Door Hinges and Pivots
  • Product Model: A280HD / A280LL
  • Product Subgroup: Continuous Hinges
  • Product Type: Continuous Hinges
  • Series: A280HD-A280LL Series
  • Subcategory: Full Mortise Hinges

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Fire Rating Compliance

This continuous hinge is approved for use on metal swinging type fire doors rated up to and including 90 minutes, and wood swinging type fire doors rated up to and including 60 minutes, ensuring code compliance for fire-rated openings.

Why Choose ABH Quality?

ABH continuous hinges deliver professional-grade reliability with anodized aluminum construction and BHMA Grade 1 certification for demanding commercial applications. The heavy-duty design supports doors up to 450 lbs (A280HD) or 1,000 lbs (A280LL) while eliminating common alignment problems through continuous weight distribution. Engineered for dependable performance where security and smooth operation 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
Keyed:
N/A
Keyed Function:
N/A
Series:
A280HD-A280LL Series
BAA Qualified:
Yes
Product Model:
A280HD / A280LL
Product Category:
Door Hinges and Pivots
Department:
Door Hardware

ABH A280 HD C 079 – Frequently Asked Questions

1) How much door weight can the ABH A280 continuous hinge carry?
Up to 450 lbs on the A280HD. If you're hanging something heavier, the A280LL lead-lined version is rated to 1,000 lbs. Weight is the first thing to settle on a continuous hinge, because the load is carried down the full height of the door rather than at three or four butt points.
2) What is the difference between the ABH A280HD and the A280LL?
The A280LL is the lead-lined version, ordered by choosing "Yes" on the lead-lined option, and it carries doors up to 1,000 lbs. The A280HD is the standard heavy duty build at 450 lbs. Lead-lined doors show up in radiology and imaging suites, and they are far heavier than a normal hollow metal leaf, which is why the LL exists as a separate rating.
3) Is the ABH A280 continuous hinge approved for a fire rated opening?
It is. The A280HD/A280LL is approved for metal swinging fire doors rated up to and including 90 minutes, and for wood swinging fire doors up to and including 60 minutes. That 60 minute ceiling on wood is the detail that catches people out, so if you have a 90 minute wood leaf, this hinge is not the one.
4) Is the ABH A280 hinge BHMA Grade 1 certified?
Yes, it meets BHMA 156.25 Grade 1. That is the top certification tier for continuous hinges and it is usually what an institutional spec or a government submittal calls for. It is also BAA qualified, which matters on federally funded work.
5) What continuous hinge do I use on a 1-3/8 inch door instead of the ABH A280HD?
The ABH A280HD/A280LL is engineered specifically for 1-3/4 inch thick doors, so it is the wrong hinge for a 1-3/8 inch leaf. The Pemko FM-SLF is a short leaf flush continuous geared hinge built for 1-3/8 inch doors with Grade 1 construction, which is the direct answer for that opening. On the other side of the range, the NGP HD5700 covers 1-3/4 inch through 2-1/4 inch doors as a full surface hinge with a 1/16 inch door inset.
6) What is the closest equivalent to the ABH A280HD full mortise geared continuous hinge from another manufacturer?
The A280HD is a heavy duty full mortise aluminum continuous geared hinge for 1-3/4 inch doors, BHMA Grade 1, in 79, 83, 85, 95 and 120 inch lengths. The Design Hardware FMHD is also a full mortise heavy duty continuous geared hinge, so it is the direct type-for-type counterpart. The Pemko FM-RG Series is a Grade 1 aluminum full mortise raised geared continuous hinge with a 180 degree swing, and the Pemko CFM84SLF-HD1 is an 84 inch full mortise short leaf flush heavy duty Grade 1 hinge. All three mortise into the door edge and frame rabbet the same way the A280HD does; confirm length and door thickness against the opening before you order.
7) Which continuous geared hinges are fire rated for a 90 minute metal door opening if the ABH A280HD is not the one being specified?
The ABH A280HD/A280LL is approved for metal swinging fire doors up to and including 90 minutes and wood swinging fire doors up to and including 60 minutes. Among the alternatives, the BEST 663HD is a heavy duty continuous hinge with a 90 minute UL fire rating for 3/32 inch inset doors, the BEST 664HD is the full surface heavy duty hinge with a 90 minute UL fire rating, and the NGP HD1100A, HD5400A and HD5700 all carry a 10C fire rating of 90 minutes on hollow metal. Match the mounting type to the opening: the 663HD and 664HD and HD5700 are surface or inset applications, while the HD1100A is concealed.
8) The door edge and frame cannot be mortised on an existing opening - what continuous geared hinge goes on instead of a full mortise?
A full mortise hinge such as the ABH A280HD needs prep in both the door edge and the frame rabbet. Where that prep is not possible, a surface applied hinge mounts to the face of the door and frame: the Design Hardware FSHD is a full surface heavy duty continuous geared hinge, and the FSOHD is the full surface offset version for openings where the door face and frame face are not in the same plane. The BEST 664HD is a full surface heavy duty continuous geared hinge carrying a 90 minute UL fire rating, and the NGP HD5700 is an 83 inch full surface geared hinge with a 1/16 inch door inset for 1-3/4 inch to 2-1/4 inch doors.
9) Does the NGP HD1100A substitute for the ABH A280HD on a Grade 1 spec?
They are both concealed heavy duty continuous geared hinges, but they do not certify the same. The ABH A280HD/A280LL meets BHMA 156.25 Grade 1. The NGP HD1100A is listed at Grade 3 and comes in an 83 inch length. If the drawing calls for Grade 1, the A280HD holds that certification, as do the Pemko FM-RG Series, the Pemko CFM84SLF-HD1 and the Pemko DSH1000. Check the grade line on the submittal before swapping in the HD1100A.
10) The ABH A280LL handles lead lined doors - is there another continuous hinge that does the same job?
The A280LL is the lead lined version of the A280HD and supports doors up to 1,000 lbs, against 450 lbs for the standard A280HD, and it is offered in the same 79, 83, 85, 95 and 120 inch lengths and in Black, Clear Anodized Aluminum and Dark Bronze. Among the heavy duty geared hinges alongside it - the Design Hardware FMHD, FSHD and FSOHD, the BEST 663HD and 664HD - the duty rating is heavy duty, which is the ordinary commercial leaf weight class. For a lead lined leaf, the A280LL is the one carrying the 1,000 lb figure, so specify it rather than substituting a standard heavy duty hinge.
11) Should I use a full mortise continuous hinge or a full surface one?
Full mortise, like the ABH A280HD, sets into the edge of the door and the frame rebate so the hinge is concealed when the door is closed. It suits new doors and frames that are already prepped, and it gives a cleaner look. Full surface applies to the face of the door and frame instead, which is the retrofit answer when the existing edge prep is chewed up or the frame will not take a mortise. If that describes your opening, look at the Design Hardware FSHD full surface heavy duty geared hinge or the BEST 664HD full surface geared hinge instead.
12) Do I need to order screws separately for the ABH A280 continuous hinge?
No, fasteners come with it. The hinge ships with 12-24 x 3/4 inch undercut self drilling, thread forming tek machine screws, so it fixes into hollow metal without pre-tapping. Nothing else has to be added to mount the hinge itself.
13) Will a continuous geared hinge stop my commercial door from sagging and dragging?
That is the main reason to move off butt hinges. The A280HD runs the full height of the opening and spreads the load along the entire edge instead of concentrating it at three or four hinge points, so the door does not drop out of alignment and start binding on the strike. It also reinforces the frame continuously, which is what fails first on a high traffic entry.
14) Which continuous hinge should I standardize on across a healthcare facility where doors get wiped down and hardware has to be smooth?
For hospital and clinical corridors the leaf ends matter. The BEST 641 is a steel full mortise continuous hinge with hospital tips at a medium duty rating, and the BEST 651 is the stainless steel full mortise hinge with hospital tips, also medium duty - hospital tips give the sloped end that does not catch. The ABH A280HD/A280LL is the heavier option for the same full mortise prep: BHMA Grade 1, anodized aluminum, 450 lbs or 1,000 lbs on the lead lined A280LL, which is the version to use on x-ray room leaves. A common approach is the A280HD on the high traffic and heavy leaves and the 641 or 651 on lighter patient room doors.
15) Is the Pemko DSH1000 anti-barricade hinge an alternative to the ABH A280HD?
It looks like a peer because both are Grade 1 continuous hinges, but they solve different problems. The Pemko DSH1000 is an anti-barricade continuous hinge with 100 degree bidirectional operation, meaning the door can swing both ways so an occupant cannot barricade the opening - that is a behavioral health and detention type application. The ABH A280HD/A280LL is a conventional single direction full mortise geared hinge for 1-3/4 inch doors, BHMA Grade 1, carrying 450 lbs or 1,000 lbs in the lead lined A280LL. If the spec asks for bidirectional swing, the A280HD will not deliver it; if it does not, the DSH1000 is more hinge behavior than the opening calls for.
16) What is the difference between the ABH A280HD and a half surface continuous geared hinge like the NGP HD5400A?
Mounting is the difference. The ABH A280HD/A280LL is full mortise: it sets into prep in both the door edge and the frame rabbet on a 1-3/4 inch door. The NGP HD5400A is a half surface hinge in an 83 inch length with aluminum alloy construction, so one leaf mounts to the face of the door while the other goes into the frame - the usual answer when the frame can be prepped but the door face cannot be cut, as on a retrofit metal leaf. Both are aluminum bodied and the HD5400A carries a 10C 90 minute fire rating on hollow metal, matching the A280HD's 90 minute approval on metal swinging fire doors.
17) I need a geared continuous hinge that swings a full 180 degrees - does the ABH A280HD do that or is there another option?
The Pemko FM-RG Series is a Grade 1 aluminum full mortise raised geared continuous hinge specified with a 180 degree swing, so where the drawing calls out that swing angle explicitly, the FM-RG is the one carrying it. The ABH A280HD/A280LL is a full mortise concealed geared hinge for 1-3/4 inch doors at BHMA Grade 1, and its raised versus concealed gear geometry differs from the FM-RG's raised barrel. Both mortise into the door edge and frame, so the prep work is comparable if you are swapping between them.
18) My door is 84 inches tall - does the ABH A280HD come in that length or do I need a different hinge?
The ABH A280HD/A280LL comes in standard lengths of 79, 83, 85, 95 and 120 inches, so an 84 inch leaf takes the 83 inch hinge. If the job requires a hinge cut to that exact height, the Pemko CFM84SLF-HD1 is an 84 inch full mortise short leaf flush heavy duty Grade 1 hinge. The NGP HD1100A and HD5400A are both 83 inch, matching the A280HD's 83 inch option.
19) What finishes does the ABH A280 aluminum continuous geared hinge come in?
Three: clear anodized aluminum, dark bronze, and black. Clear anodized is the one that disappears against an aluminum frame, dark bronze matches most bronze storefront and dark painted hollow metal, and black suits dark frames. All three are offered in every length and in the lead-lined version, so a facility standardizing on one finish can keep it consistent across the whole door schedule.
20) Does the ABH A280 continuous hinge close the gap along the hinge side for security?
Yes. Because the geared leaf runs the full height of the door, there is no open gap between door and frame on the hinge side for a pry bar to catch. On a butt hinged door that gap and the exposed knuckles are the weak point. It is a common reason continuous hinges get specified on multi-tenant and government entries.
21) Is a stainless steel continuous hinge better than an aluminum one for my opening?
Different jobs. The ABH A280 is anodized aluminum, which is light, corrosion resistant, and finished to match aluminum and painted frames. Where you want steel instead, BEST lists the 641 steel and 651 stainless steel full mortise continuous hinges with hospital tips, both rated medium duty rather than heavy duty. Hospital tips are the sloped ends that give nothing for a ligature or debris to catch on, which is why they turn up in healthcare and detention work.
22) Can I use the ABH A280 continuous hinge to standardize hinges across a whole building?
It works well for that. One model covers 1-3/4 inch doors at five heights from 79 to 120 inches in three finishes, all at BHMA 156.25 Grade 1, and the lead-lined variant handles the imaging rooms without switching brands or finish. For a property manager or facilities buyer that means one line on the door schedule and one part family to stock.
How fast can I get the ABH A280 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 A280 HD C 079 come with a warranty?
Absolutely. The ABH A280 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 A280 HD C 079?
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