ANSI/BHMA A156.4: Grade 1 vs Grade 2 Door Closers Guide

Q: Can I install a larger spring size and then detune it for ADA?

Yes, within the closer adjustable range. Many Grade 1 closers are adjustable across several spring sizes. Installing a size 4 body on an interior ADA door and dialing the spring down gives you room to compensate for stack pressure without changing hardware.

Performance standards for commercial door closers with Grade 1 and Grade 2 specifications, ADA force limits, and NFPA 80 inspection requirements

Last updated: April 9, 2026

What is ANSI/BHMA A156.4?Grade 1 vs Grade 2 Selection by Application Arm Types Spring Sizing & Adjustment ADA Force Compliance Fire Door Requirements Mounting Orientation NFPA 80 Inspection FAQ Compliant Products Related Resources

What is ANSI/BHMA A156.4?

ANSI/BHMA A156.4 defines performance standards for commercial door closers. Maintained by the Builders Hardware Manufacturers Association (BHMA), the standard establishes cycle testing, durability ratings, and performance criteria for the demands of commercial, institutional, and public buildings.

Most facility managers do not care about the standard itself. They care about passing fire door inspections, staying out of ADA complaints, and not replacing the same closer every two years. A156.4 is the shorthand inspectors and specifiers use to make sure the product on the door is the right grade for the opening it serves.

Grade 1 vs Grade 2 Door Closers

The BHMA grading system maps a closer to its expected usage and lifespan. Grade 1 is the commercial baseline for anything inspectors will check. Grade 2 is for light commercial or heavy residential use where traffic and abuse are limited.

Attribute	Grade 1	Grade 2
Minimum cycle test	2,000,000 cycles	500,000 cycles
Typical use	Hospitals, schools, airports, retail entrances	Small offices, apartments, utility rooms
Exterior door weight	Up to roughly 250 lbs	Up to roughly 175 lbs
Fire-rated openings	Common (when listed)	Limited to lower ratings (when listed)
Full valve adjustment	Sweep, latch, backcheck, delayed action	Sweep and latch; limited backcheck

Heads up: Grade 3 closers exist but are not appropriate for most commercial openings. If a door is on a fire-rated assembly, an ADA path of travel, or a heavy traffic entry, specify Grade 1.

Closer Selection by Application

The right closer depends on the opening. Interior office doors, exterior entrances, fire-rated stairwell doors, and ADA accessible paths all have different constraints. Use this table as a starting point when you are spec'ing or replacing closers in the field.

Application	Typical spring size	Preferred arm	Key adjustment notes
Interior office or corridor	Size 2 to 3	Regular arm	Tune sweep slow; keep opening force within ADA interior limit
Exterior entrance	Size 4 to 6	Parallel arm	Use backcheck to protect hinges from wind; watch stack pressure
Fire-rated stairwell	Size 3 to 5	Parallel arm	Must self-close and positive-latch from any open position
ADA accessible path	Size 1 to 3 (adjustable)	Regular arm	Verify with force gauge after install; sweep ≥ 5 seconds
Heavy traffic retail	Size 4 to 5	Parallel arm or cush	Specify Grade 1, 2M cycle; cush stop where wall protection matters
Vestibule or storefront	Size 3 to 5	Top jamb or parallel arm	Delayed action helps carts, wheelchairs, and hand trucks pass

Spring sizes are recommendations. Final sizing depends on door width, door weight, and the wind and stack pressures the opening actually sees. On exterior doors in tall buildings, expect to move one spring size larger than the chart suggests to overcome stack effect.

Arm Types

Arm choice drives how the closer transfers force to the door and how the assembly looks and behaves once installed. A facility manager specifying a replacement closer should match the existing arm style when possible, since changing arm types often means new mounting holes and new templates.

Arm style	When to use it	Why specify it
Regular arm	Pull side of door, interior and most offices	Most efficient power transfer; lowest cost; simplest install
Parallel arm	Push side, exterior doors, high-traffic openings	Lower profile; better vandal resistance; arm stays out of the way
Top jamb	Doors with narrow top rails or when pulling onto frame	Puts the closer body on the frame when the door face cannot hold it
Cush arm (stop-in-arm)	Openings that need a built-in stop to protect walls	Eliminates separate floor or wall stop; protects adjacent surfaces
Hold-open arm	Non-fire-rated openings where staff need the door held	Mechanical hold-open at a fixed angle; never use on fire doors unless tied to an electromagnetic release

Inspector red flag: A mechanical hold-open arm on a fire door is an automatic inspection failure under NFPA 80. If the door needs to stay open for traffic flow, the hold-open must be tied to a smoke detector or fire alarm release device that drops the door closed on alarm.

Spring Sizing & Adjustment

Spring size determines how hard the closer pulls the door shut and, by extension, how much force a person has to apply to open it. Under-sized springs fail to latch. Over-sized springs violate ADA force limits and beat the hinges to death. Match spring size to door width first, then confirm in the field with a force gauge.

Spring size	Door width	Typical use
Size 1	Up to 28 in	Small interior doors, closets, storage rooms
Size 2	Up to 32 in	Interior office and corridor doors
Size 3	Up to 36 in	Standard interior 3-0 doors, light exterior
Size 4	Up to 42 in	Standard exterior entrances
Size 5	Up to 48 in	Wide exterior, heavy fire-rated doors
Size 6	Up to 54 in	Extra-wide exterior, high stack pressure

What the valves actually do

Sweep: controls closing speed from about 90° down to 12° from the latch. Turning clockwise slows the sweep.
Latch: controls the final 12° of closing. Used to make sure the door positively latches against seals and strike tension.
Backcheck: cushions the door at roughly 75° to prevent a hard-opened door from damaging hinges, walls, or the closer itself.
Delayed action (when equipped): holds the door open briefly after being released, giving carts, wheelchairs, and hand trucks time to pass before sweep begins.

ADA note: Closers serving accessible openings must be adjustable so a technician can dial in the opening force and sweep time to meet ADA limits without losing positive latching. A closer without a full valve set is the wrong product for an accessible opening.

ADA Force Compliance

The 2010 ADA Standards for Accessible Design §404.2.9 set hard limits on how much force a user can be required to apply to push or pull a door open. ANSI A117.1 §404.2.9 mirrors these limits and is the enforceable text in most state building codes. Exterior doors are technically exempt from the federal 5 lb cap but most jurisdictions still require a practical ceiling so the door is usable.

Requirement	Limit
Interior non-fire door opening force	5 lbs maximum
Exterior door opening force (typical state adoption)	8.5 lbs maximum
Sweep time, 90° to 12° from latch	5 seconds minimum
Fire door opening force	Exempt from the 5 lb cap; must still self-close and positive-latch

Field adjustment procedure

Use a certified opening-force gauge. Measure at the pull side, perpendicular to the door face, just above the latch. Adjust in this order:

Spring power first. Reduce spring tension until the measured force is at or below the applicable limit and the door still positively latches.
Sweep valve next. Slow the sweep until the door takes at least 5 seconds to travel from 90° to 12° from latch. Time it.
Latch valve last. Increase latch speed only as much as needed to ensure positive latching against the gasketing and latch tension.
Document it. Record measured force and sweep time on the door hardware schedule or maintenance log for inspection.

Watch out: A closer that meets the opening force limit on a calm day can fail on a windy day or during HVAC stack events. If the door is borderline, you will get ADA complaints. Move to a larger spring size with a better backcheck before you cheat the sweep time.

Fire Door Rating Requirements

Door closers on fire-rated openings must meet requirements beyond standard A156.4 performance. The door, frame, hinges, gasketing, and closer must all carry matching fire ratings and labels. A mismatched assembly fails inspection even if every part is labeled on its own.

UL 10C listing: positive pressure fire test certification is required on labeled fire doors.
Self-closing function: must reliably close and positively latch the door from any open position.
Temperature rating: must continue to function under elevated temperatures encountered during a fire test.
No disabled hold-opens: mechanical hold-open arms are not allowed on fire doors unless the hold-open releases on alarm through a listed device.
Labeling: fire-rated closers must bear the appropriate UL or WH mark, visible and legible.

Fire ratings and typical applications:

20-minute rating: corridor doors in residential occupancies
45-minute rating: corridor doors in business occupancies
90-minute rating: stairwell doors and exit enclosures
3-hour rating: fire walls between buildings or major occupancy separations

Mounting Orientation

Mounting location follows the door swing and the frame. Pick the wrong orientation and the arm fights the door all day. The three primary mounts each solve a different geometry problem.

Mount	Closer body location	Use when
Regular arm	Pull side of the door	Door swings toward you and you have a standard top rail
Parallel arm	Push side of the door	Door swings away from you or the arm needs to stay out of the opening
Top jamb	Face of the frame head, push side	Door top rail is too narrow for the closer body, or the frame is aluminum storefront

Field tip: When a closer replacement is not going cleanly, re-check whether the existing mounting orientation is correct for the swing. Many problem doors were installed with the wrong arm style and have been limping along for years.

NFPA 80 Annual Fire Door Inspection Checklist

NFPA 80 requires a visual inspection and functional test of every fire door assembly at least once a year. For door closers, inspectors look for a self-closing function, full latching, and evidence that the hardware has not been modified, damaged, or removed. Use the checklist below as a walk-through before the inspector shows up.

What the inspector actually checks on the closer

Door self-closes and fully latches from any open position, including a partial open test at roughly 30°
Closer body, arm, and mounting bracket are secure to both the door and the frame with no loose fasteners
No field modifications: no drilled holes in the arm, no bent or welded parts, no painted-over label
No signs of damage: no cracked castings, no leaking hydraulic fluid, no broken cover, no missing cover screws
All required hardware present: arm, main arm forearm, pivot, cover, and all fasteners
Mechanical hold-open arms are not in use on fire doors unless tied to a listed release device
Closer label is legible and matches the rating of the door assembly (UL, WH, or equivalent)
Annual inspection tag or record is current and filed with the facility compliance records

For a full walkthrough of the NFPA 80 fire door inspection process across the whole assembly, see UL 10C Fire-Rated Doors.

Frequently Asked Questions

What happens if a closer fails its NFPA 80 annual inspection?

The deficiency has to be corrected without delay. NFPA 80 does not give a grace period for failed self-closing or missing hardware on fire doors. Document the failure, repair or replace the closer with an equivalent listed product, and retain the record for the next inspection cycle.

Are exterior doors really exempt from the 5 lb ADA opening force limit?

Federally, yes. The 2010 ADA Standards §404.2.9 only set the 5 lb cap for interior non-fire doors. Most states cap exterior doors at 8.5 lbs under ANSI A117.1 or a local amendment. Check your state code before assuming exterior openings have no limit.

Can I install a larger spring size and then detune it for ADA?

Yes, within the closer's adjustable range. Many Grade 1 closers are adjustable across several spring sizes. Installing a size 4 body on an interior ADA door and dialing the spring down gives you room to compensate for stack pressure without changing hardware.

How do I measure opening force correctly?

Use a push-pull force gauge pressed against the door face just above the latch, perpendicular to the door, and record the peak force required to start the door moving from a fully closed, latched state. Take multiple readings to account for stack and wind effects.

Is a mechanical hold-open arm ever acceptable on a fire door?

Only when the hold-open is released by a listed fail-safe device such as a smoke detector, fire alarm relay, or an electromagnetic hold-open that drops the door closed on alarm. A plain friction hold-open arm is not allowed on fire doors.

Can a Grade 2 closer ever be specified for a commercial opening?

Yes, in light commercial settings: small private offices, utility rooms, storage rooms, and similar low-cycle openings. Avoid Grade 2 on fire doors, heavy traffic entrances, and ADA accessible paths where service life and adjustability matter.

Does a delayed-action closer count against ADA sweep time?

No. Delayed action is a separate valve that holds the door briefly before sweep begins. ADA sweep time is measured from the end of the delayed-action phase, when the door actually starts moving, down to 12° from latch.

How long should a Grade 1 closer last in the field?

On a properly sized and installed opening, a Grade 1 closer should run for many years before replacement. Early failures almost always trace back to under-sized springs fighting wind, over-torqued fasteners, or an arm style that does not match the frame.

Compliant Products at US Made Supply

The selection below covers ANSI/BHMA A156.4 compliant closers across Grade 1 and Grade 2. Each product ships with ANSI/BHMA certification, installation templates, and valve adjustment instructions for field tuning.