Understanding Commercial Door Hardware

The front door of a busy shop in downtown New Braunfels might open a few hundred times on a summer Saturday. Most front doors at home don’t see that in a month. Commercial doors take far more abuse, and the hardware on them has to be built for it.

A commercial door is a set of parts that depend on each other. When a door won’t latch, the latch is often fine. The real problem is a worn hinge or a closer that’s lost its adjustment. Knowing what each part does makes it a lot easier to figure out what’s actually wrong, and to avoid paying to replace parts that never needed it.

The Main Parts of a Commercial Door

Locks and latches. Most commercial doors use either a cylindrical lock, which fits through a round hole in the door, or a mortise lock, which sits in a pocket cut into the edge of the door. Mortise locks are heavier and hold up better on doors that get constant use. Glass storefront doors are a category of their own. Their narrow aluminum frames need slim locks made specifically for them, which is why a standard lock from a hardware store won’t fit.

Levers and pulls. Levers have mostly replaced knobs on commercial doors. They’re easier for everyone to use, and accessibility rules effectively require them on many doors, which we’ll get to below. Pull handles and push plates are common on doors that don’t latch at all.

Hinges. Hinges carry the full weight of the door every time it moves. Commercial doors usually hang on heavy-duty ball-bearing hinges. Very heavy doors or ones with lots of traffic often get a continuous hinge that runs the full height of the door. When hinges wear, the door starts to sag, and a sagging door is one of the most common reasons a latch stops lining up with its strike.

Door closers. The closer is the arm, or the hidden mechanism, that pulls the door shut. It controls how fast the door swings and how firmly it latches at the end. Closers can be mounted on the surface of the door, concealed in the frame, or set into the floor, which is common on glass storefronts. They also have more to do with whether a door works properly than almost any other part.

Exit devices. Push bars, also called panic bars, let people get out with a single push. They have their own rules about when they’re required and what’s allowed on fire doors. We cover all of that in our post on push bars and panic hardware.

Electrified hardware. If you want a door to open with a card, fob, or code, the lock needs an electric component. The two most common are electric strikes, which work with the lock already on the door, and magnetic locks, which hold the door shut with an electromagnet.

What Hardware Grades Mean

Door hardware is rated by grade under standards from ANSI and BHMA, the groups that test it. Grade 1 is built for heavy commercial use, like main entrances, schools, and hospitals. Grade 2 suits lighter commercial doors such as interior offices. Grade 3 is mostly residential.

Putting Grade 2 or Grade 3 hardware on a busy business entrance to save money tends to backfire. It wears out faster, and you end up paying for the hardware twice. For exterior doors and anything with steady traffic, we generally recommend Grade 1.

Keys and Security

“I think there are five keys to the back door. Maybe seven.” We hear some version of that a lot. Keys get copied and handed out over the years, and not all of them come back.

A master key system lets a manager open every door while each employee’s key only opens the doors they need. Restricted keys go a step further, because copies can’t be made at a hardware store without authorization. For doors where keys don’t make sense at all, an access control system lets you shut off a lost card instead of rekeying the building. Our commercial locksmith services cover all three.

Fire-Rated Doors Have Stricter Rules

Fire-rated doors are built to slow the spread of fire and smoke, and they only work if they close and latch every time. That’s why a fire door needs a closer, and why its latch has to catch on its own without anyone pushing it shut. The hardware on it also has to be listed for use on fire doors. You can’t swap in whatever lock or exit device is handy.

You can usually find the label on the edge of the door or the hinge side of the frame. Under the national fire door standard, these doors are typically inspected every year. A closer that doesn’t pull the door all the way shut, or a latch that’s been taped over, is the kind of thing that fails that inspection.

ADA and Texas Accessibility Standards

Here in Texas, accessibility for most commercial buildings is governed by the Texas Accessibility Standards, which the Texas Department of Licensing and Regulation enforces. They closely follow the federal ADA standards, and door hardware is one of the areas they cover.

The basic rule is that hardware has to work with one hand, without tight grasping, pinching, or twisting the wrist. That’s why levers, push bars, and pull handles are standard on commercial doors and round knobs aren’t. Door hardware also has to be mounted between 34 and 48 inches above the floor.

What About the Closer?

It counts too. On most interior doors, you shouldn’t need more than about 5 pounds of push to open it. And it can’t slam. From wide open, it should take 5 seconds or more to get almost shut. We can usually fix both with a quick adjustment. Fire doors and outside doors have their own rules.

What Wears Out First

The closer is usually the first thing to wear out. It’s full of oil, and heat changes how that oil flows. That’s why plenty of doors around here slam in July and then don’t latch in January. If yours changes with the seasons, the closer probably just needs an adjustment.

Hinges are usually next. As they wear, the door drops a little at a time until the latch starts catching on the strike or misses it completely. You’ll often notice the door rubbing at the top corner on the latch side before anything else goes wrong.

Locks and latches tend to outlast both. When they do fail, it’s often because a sagging door or a slamming closer has been beating on them for months.

Repair or Replace?

A lot of door problems can be fixed with an adjustment. Closers can be re-tuned, hinges can sometimes be shimmed, and strikes can be moved to meet a latch that’s shifted. That’s always the first thing we look at.

Replacement makes sense when a part keeps failing after it’s been adjusted, when it’s cracked or leaking, or when it no longer fits how the door gets used. A closer leaking oil is done. So is hardware that can’t meet the accessibility or fire rules the door falls under. If you’re not sure, our post on signs it’s time to upgrade your locks covers the warning signs for locks specifically.

Frequently Asked Questions

What grade of door hardware does my business need?
Grade 1 for exterior doors and anything that gets steady traffic. Grade 2 is usually fine for interior offices and storage rooms.

Do commercial doors have to have levers instead of knobs?
On doors covered by accessibility rules, the hardware has to work without grasping or twisting, so in practice that means levers, pulls, or push bars.

Why won’t my door close all the way?
Usually it’s the closer, either out of adjustment or worn out. Sagging hinges and a strike that’s out of line are the next most likely causes.

Can I replace one part without replacing everything?
Most of the time, yes. Closers, hinges, and locks can all be replaced on their own, as long as the new part fits the door and works with what’s already there.

Does Texas have its own accessibility rules?
Yes. The Texas Accessibility Standards apply to most commercial buildings in the state and are enforced by TDLR. They closely follow the federal ADA standards.

Commercial Door Hardware Service Across the Hill Country

Our shop is on Landa Street in New Braunfels, and we’ve been working on commercial doors around here since 1989. We service restaurants and shops in Gruene and downtown New Braunfels and office buildings in San Antonio. 

We also work on storefronts along Main Street in Fredericksburg, businesses near the Texas State campus in San Marcos, and the event venues out around Dripping Springs and Wimberley. Every one of those doors is dealing with the same Texas heat. You can see the full list of cities we serve on our site.

Our door hardware repair and upgrade service covers locks, closers, hinges, exit devices, and the electronic hardware that ties into them.

Get Your Doors Looked At

If a door is slamming, sticking, or not latching, call us. Most of the time it’s a quick fix, and we’ll tell you if it isn’t.