Commercial Locksmith
One rule drives almost all of it: door hardware on an accessible route must be operable with one hand, without tight grasping, tight pinching, or turning the wrist. That is why lever handles, push-pull sets, loop handles, and panic hardware pass and round knobs do not. Interior hinged doors are also limited to 5 pounds of opening force, and a closer must take at least 5 seconds to swing the door from 90 degrees down to 12 degrees from the latch.
This guide is orientation written from the hardware side of the problem - what we fit, adjust, and get asked about on New York City storefronts and offices. It is not a code determination. Which requirements apply to your specific building, occupancy, and scope of alteration is a question for a registered design professional and the Department of Buildings, and anything carrying legal weight should be confirmed with one.
The ADA Standards treat a door handle as an operable part, and operable parts have to work for someone who has limited hand strength, limited dexterity, arthritis, a prosthesis, or only one free hand. The test is functional rather than aesthetic: can the hardware be released and the door opened with one hand, without having to grip tightly, pinch, or rotate the wrist?
Hardware that normally satisfies that:
Hardware that reliably causes trouble: round knobs, small thumb-turns that have to be pinched and twisted, tight bathroom turn-buttons, surface bolts mounted out of reach, and anything that needs two separate hands or two separate actions. The ADA Standards also place operable parts no lower than 34 inches and no higher than 48 inches above the floor, which quietly rules out high surface bolts and low slide latches on an accessible door.
The Standards cap interior hinged doors - and sliding and folding doors - at 5 pounds of force to open. Exterior hinged doors and fire doors are not given a maximum in the ADA Standards, because a fire door needs enough closing force to latch reliably and an exterior door has wind and stack pressure to overcome.
Here is what matters practically: almost every door that fails the 5-pound test is failing for a reason that is cheap to fix. A closer cranked up to stop the door being left ajar. A binding hinge. A door dragging on a swollen frame or a carpet edge. A latch that is catching the strike because the door has dropped. A door gauge settles the argument in about fifteen seconds, and the remedy is usually an adjustment rather than new hardware. The same mechanical faults turn up in a door that will not lock properly, and they are worth fixing for their own sake.
A door that slams is an accessibility problem as well as an annoyance. Under the ADA Standards, a door fitted with a closer must take at least 5 seconds to travel from 90 degrees open to 12 degrees from the latch, and doors on spring hinges must take at least 1.5 seconds to move from 70 degrees to closed. The intent is simply that someone moving slowly, or using a wheelchair, walker, or crutches, has time to get through.
Most commercial closers have independent sweep and latch adjustment valves, so this is a service call rather than a replacement in the majority of cases - unless the closer is leaking oil or has lost control entirely, which happens and is not worth nursing. Door closer repair goes through the symptoms and the fixes.
Hardware is only part of a doorway. The Standards call for a minimum 32 inches of clear width measured with the door open 90 degrees, from the face of the door to the stop - which is why a 32-inch door leaf does not produce a 32-inch opening. Thresholds at doorways are limited to half an inch high, with anything above a quarter inch bevelled. And there has to be manoeuvring clearance on each side, sized by the approach direction, so that someone using a wheelchair can get into position to reach the handle at all.
That last point catches New York businesses more than any other. A lever handle on a door you cannot square up to because the vestibule is too shallow, or because a display rack, a propped delivery, or a stanchion is parked in the clearance, does not help anyone. In a city built on narrow storefronts and shared vestibules, the clearance is frequently the binding constraint, and it is not something hardware can solve.
Business owners tend to assume accessible means less secure. It does not, because the two requirements govern different things: accessibility is about how hardware is operated from the authorised side, and security is about resisting someone who has no business being there.
We convert knobs to lever sets, fit push-pull and exit hardware, adjust closers and sweep timing, and realign binding doors for businesses across Brooklyn, Manhattan, Queens, the Bronx, and Staten Island.
The ADA is federal civil rights law and applies to places of public accommodation regardless of what any local code says. Separately, New York City enforces accessibility through its own Building Code, which adopts the ICC A117.1 accessibility standard, and through the City Human Rights Law. New York State also has a Human Rights Law covering public accommodations. The result is more than one obligation pointing at the same door, which is why a hardware supplier cannot tell you what you must do - a design professional reads the applicable requirements against your building and your scope of work.
Two practical consequences. First, alteration work on an entrance is usually the moment accessibility requirements get looked at, so plan hardware into the job rather than discovering it afterwards. Second, landmarked buildings and existing non-conforming conditions have their own processes - architect-and-expediter territory, not something to guess at.
A round knob on an accessible route is the classic failure, because it cannot be operated without grasping and twisting the wrist. The ADA Standards require door hardware to be operable with one hand, without tight grasping, tight pinching, or wrist rotation, which is why lever handles, push-pull sets, loop handles, and panic hardware are the normal answers. Swapping a knob for a lever is usually straightforward because the mounting dimensions are standardised.
The ADA Standards set a maximum of 5 pounds of force to push or pull open interior hinged doors, as well as sliding and folding doors. The Standards do not set a maximum for exterior hinged doors or for fire doors, which need enough closer force to latch reliably. In practice, most doors that fail this test are failing because of a closer adjusted far too strong or a binding hinge, not because the door itself is heavy.
Under the ADA Standards, a door with a closer must take at least 5 seconds to move from an open position of 90 degrees to a position 12 degrees from the latch. Doors with spring hinges must take at least 1.5 seconds to move from 70 degrees to closed. Both are adjustable on most hardware, so a door that slams is normally a closer that needs adjusting or replacing rather than a new door.
It depends what the hardware does and where the door sits. Small thumb-turns are commonly questioned because they can require pinching and wrist rotation to operate, and on a required exit there is a separate issue: codes generally require a door on an egress path to unlatch with a single motion, so a deadbolt that must be released in addition to the latch can create a second problem. Where compliance matters, have the door assessed as a whole rather than judged by the deadbolt alone.
No. Accessibility governs how hardware is operated from the authorised side, not how strong the lock is. A high-security cylinder works in a lever handle exactly as it does in a knob, panic hardware can be fitted with electric latch retraction and alarms, and access control with a card or fob reader is often more accessible than a key as well as more secure. The usual mistake is treating the two requirements as a trade-off when the right hardware satisfies both.
A locksmith can tell you what hardware is fitted, measure opening force and closer timing, and install hardware that meets the operation requirements. A formal determination about which rules apply to your particular building, occupancy, and alteration work is architectural and code-review territory, and in New York City that generally means a registered design professional and the Department of Buildings. Call (718) 412-1332 for the hardware side, and treat this guide as orientation rather than advice.