Commercial Door Hardware: How to Specify It and Install It Right

What counts as commercial door hardware

Walk up to any business door and you're looking at a system, even if it seems like nothing more than a lever and a keyhole. Door hardware professionals describe an opening by listing every component that has to cooperate:

• Butt hinges, pivots or a continuous hinge carrying the door's weight
• A lockset or latchset, plus its cylinder and keying
• A strike in the frame that receives the latch and any deadbolt
• A closer that pulls the door shut and controls its speed
• A stop or holder that limits the swing
• Silencers and protection plates, and on some openings gasketing, a threshold or a door sweep

This page is about choosing and installing those parts: the grade, the lock style, the function, the trim, the hinges, the strike and the plates. Panic hardware, closer adjustment and aluminum storefront locks are close cousins with techniques of their own, and each has its own service page, although one visit frequently touches all of them.

Electrified hardware sits at the boundary of this work. We can mount an electrified mortise lock, an electric strike or a power transfer hinge, but the power supply, readers and any tie-in to a fire alarm panel often belong to a low-voltage contractor or your access-control vendor. We'll be clear at the start about where our part of the job ends and theirs begins.

ANSI/BHMA grades in plain language

Commercial hardware is tested against standards written by the Builders Hardware Manufacturers Association and approved by ANSI. The ones you're most likely to bump into:

• A156.2: bored (cylindrical) locks and latches
• A156.13: mortise locks and latches
• A156.1: butt hinges
• A156.3: exit devices
• A156.4: door closers
• A156.6: architectural trim, including kick plates, push plates and pulls
• A156.18: the finish codes, such as 626 and 630

Under the lock standards, products go through cycle testing (how many open-and-close operations they survive), lever torque testing, impact tests on the trim, bolt and latch strength tests, and finish tests for wear and corrosion. Grade 1 is the heaviest commercial tier. Grade 2 targets light commercial service, such as interior doors in a small office. Grade 3 is residential.

Two cautions. First, packaging language is slippery. The word 'commercial' on a box says nothing about grade, and 'meets Grade 1 requirements' is not the same thing as independent certification. BHMA keeps a public directory of certified products, and serious manufacturers publish grades on their spec sheets. Second, grade isn't the whole story. A Grade 1 lock on a door that droops, with a strike set in the wrong place, will still fail. The grade buys a mechanism able to take punishment; the installation decides whether it ever gets the chance to prove it.

Mortise or cylindrical: choosing the lock style

Every commercial lock project eventually reaches this fork in the road.

A cylindrical, or bored, lock mounts through a large cross bore (usually 2-1/8 inches) and a smaller edge bore for the latch. The chassis sits in the middle of the door, and the levers attach to it. Grade 1 versions such as the Schlage ND, Sargent 10 Line, Best 9K or Corbin Russwin CL3300 are tough, quick to install and simple to swap later.

A mortise lock is a rectangular steel case that slides into a deep pocket cut into the door's edge. Trim on each face fastens through the door to that case, and the cylinder threads into its front. The Sargent 8200, Corbin Russwin ML2000, Schlage L9000, Best 45H and Yale 8800 series are common examples. Because the case absorbs the load, mortise locks shrug off lever abuse better, and the case can host extra features: a deadbolt that retracts with the inside lever, an occupancy indicator, an auxiliary latch, or electrified operation.

How we decide on a given door:

• Existing prep. If the door is already cut for one style, staying with that style usually costs least.
• Traffic and abuse. Main entrances, school corridors and busy clinic doors justify mortise.
• Function. A deadbolt that retracts with the lever for one-motion egress, or a visible 'occupied' indicator, is easiest in a mortise body.
• Door construction. Hollow metal doors are prepped at the factory; cutting a new mortise pocket in a steel door in the field isn't realistic. Solid wood doors with enough stile width can be mortised on site.
• Budget. On moderately used doors, a Grade 1 cylindrical lock delivers most of the durability for considerably less.

Conversions do happen. Going from mortise to cylindrical uses a retrofit plate that hides the old pocket and provides fresh bores. Going from cylindrical to mortise on a steel door usually means ordering a new door.

Matching the lock function to the room

The function is how a lock behaves, and a poor match creates friction every single day. Here are the common commercial functions, described in words because the catalog numbers differ between mortise and cylindrical product lines:

• Passage. Both levers always free. Corridors, break rooms, doors that never lock.
• Privacy. A button or turn locks the outside lever, with an emergency release from outside. Single-user restrooms.
• Office or entry. A button or turn locks the outside, and a key overrides it. Private offices.
• Storeroom. The outside lever is always locked, and a key retracts the latch. Closets, electrical, IT and supply rooms.
• Classroom. A key on the outside locks or unlocks the outside lever. Classrooms and conference rooms.
• Classroom security, sometimes called the intruder function. A key from either side locks the outside lever, so the person inside never has to step into the hall.
• Mortise entrance functions that include a deadbolt retracted by the inside lever.

California adds some context. Current code expects many educational rooms to be lockable from inside without opening the door, which is the job the classroom security function was designed for. Egress rules require most doors to open from the inside with one operation and no key or special knowledge, so any function that locks the inside lever is almost never appropriate on the exit door of an occupied room. Indicator trim that shows 'occupied' earns its keep on restrooms, exam rooms and conference rooms where people otherwise knock or barge in.

Levers, accessibility and California's tighter numbers

Door hardware is among the most visible accessibility items in any building, and in California it carries real legal exposure. The state's Unruh Civil Rights Act allows statutory damages for access barriers, and hardware is easy for an inspector or a plaintiff's consultant to spot from the sidewalk.

The baseline rules, from the 2010 ADA Standards and Chapter 11B of the California Building Code:

• Hardware must work with one hand, without tight grasping, tight pinching or twisting of the wrist. Levers, push/pull hardware and panic bars comply; round knobs don't.
• California keeps operable parts of door hardware between 34 and 44 inches above the floor. The federal standard allows up to 48 inches, so hardware that passes elsewhere can fail here.
• Swinging doors need a smooth surface on the push side within 10 inches of the floor across the door's width, which matters on paneled doors and narrow bottom rails.
• Clear opening width, generally at least 32 inches with the door open 90 degrees, can be eaten up by hinges, stops and protruding trim.
• Opening force limits apply, and California's version also regulates exterior hinged doors, which the federal standard leaves alone.

Practical hardware choices follow from those rules. Pick levers with a firm return spring so the handle stays level where a hand expects it. Replace a small deadbolt thumb-turn with a larger one or, better, with a mortise lock whose deadbolt retracts along with the lever. Use swing-clear hinges to recover roughly a door's thickness of clear width on a tight opening. Add a 10-inch kick plate where the bottom of the door isn't flush.

If you've had a CASp (Certified Access Specialist) inspection, bring the report. We're locksmiths, not access consultants or attorneys, and we'll work through the hardware items it lists rather than guess what the inspector wanted.

Hinges: the hardware carrying all the weight

When a commercial door starts dragging, missing its latch or showing a sliver of daylight at the top corner, look at the hinges before anything else. Choosing them well comes down to a few variables:

• Size. On 1-3/4 inch doors up to about 36 inches wide, 4-1/2 inch butts are standard; wider doors generally step up to 5-inch hinges.
• Weight. Standard-weight leaves suit average doors. Heavy-weight hinges, with thicker leaves, belong on heavy doors and high-traffic openings.
• Bearings. Any door with a closer or heavy use should hang on ball-bearing hinges. Plain-bearing knuckles grind themselves down under a closer's constant pull.
• Quantity. Plan one hinge per 30 inches of height: three on a 7-foot door, four on an 8-foot door.
• Security. Out-swinging doors put the hinge pins outside. Non-removable pins or security studs keep the door in place even if a pin is driven out.
• Material. Plated steel for most interior doors; stainless for exterior, coastal or wash-down locations.

Continuous hinges are the problem solver for abused openings. A geared aluminum continuous hinge spreads the door's weight along its full height, can bridge stripped or torn frame preps, and holds alignment for years on doors that used to eat butt hinges. They cost more and take longer to fit, so we reserve them for openings whose history justifies it.

Two specialty items are worth knowing about. Swing-clear hinges move the door entirely out of the opening for a wider clear passage. Power transfer hinges carry low-voltage wires from frame to door for electrified locks without an exposed cable loop. On labeled fire doors, hinge type and material have to stay within what the listing allows, which generally rules out brass and lightweight residential hinges, so we check before substituting anything.

Strikes, latches and the frame

The strike is a small part with a large job. It has to receive the latch cleanly, protect the frame from the latch striking it on every close, and hold the latch in a position where it can't be slipped.

What we look at on every opening:

• Strike size and lip. The standard ANSI strike measures 4-7/8 by 1-1/4 inches, and its curved lip has to reach past the frame's edge so the latch rides onto metal. A lip that's too short lets the latch nick the jamb and hang up.
• The deadlocking plunger. Most commercial latches have a small guard plunger beside the latchbolt. With the door closed, that plunger should press against the strike plate, which locks the latch in its extended position. If the door-to-frame gap is too wide, the plunger drops into the strike opening and the latch can be pushed back with a thin tool.
• Latch throw. Cylindrical latches commonly throw 1/2 inch, mortise latches about 3/4 inch, and mortise deadbolts about 1 inch. Doors with wide gaps or seasonal movement benefit from the deeper throw.
• Strike boxes. On hollow metal frames, a box behind the strike keeps grout and debris out of the latch pocket.
• Clearances. Steel fire doors typically allow about 1/8 inch at the head and jambs, within a small tolerance, and a limited gap at the bottom.

Southern California heat adds a wrinkle. Hollow metal doors in afternoon sun bow as the outer skin heats and expands, which can drag the latch against one side of the strike or pull it partly out. We set strikes with that movement in mind and lean toward deeper-throw latches on exposed doors. For doors that have been attacked, reinforced strikes and latch guards add protection, provided they don't interfere with egress or the fire rating.

Protection plates, stops and silencers

The small hardware is cheap insurance for the expensive door.

Protection plates come in three main types:

• Kick plates on the push side, typically 8 to 10 inches tall and 2 inches narrower than a single door; on pairs, 1 inch less than each leaf is a common choice.
• Mop plates on the pull side, usually 4 to 6 inches tall, guarding against mops and floor machines.
• Armor plates, commonly 30 inches or taller, for doors that take hits from carts, gurneys or pallet jacks.

Plates are made in stainless, brass, bronze and plastic laminate; satin stainless (630) is the practical choice for most businesses. Beveled edges reduce snagging. On fire-rated doors, a plate whose top edge sits more than 16 inches above the bottom of the door generally has to be labeled for fire door use, and attachment should follow the plate and door manufacturers' instructions.

Stops limit how far the door travels. Wall stops protect drywall from lever handles. Floor stops work where the wall is far away, though they can become a trip hazard in walkways. Overhead stops mount at the top of the door and suit openings that catch wind. Holders keep doors open; on fire doors, that's only permitted with listed devices that release on alarm, never kick-down holders or wedges.

Silencers are rubber bumpers pressed into the stop of a steel frame: typically three on the strike jamb of a single door and two in the head of a pair. They cushion closing, reduce rattle and keep light pressure on the latch so it stays seated. On older frames, they're often worn flat or missing entirely.

Fire-rated openings: what changes

A fire door is an assembly: the door, frame, hinges, latch, closer and other hardware are tested and listed together. A label on the door's hinge edge and another on the frame identify the rating. Changing hardware on that opening carries rules from NFPA 80, the fire door standard that California's building and fire codes reference.

In practice that means:

• Hardware must be listed for fire door use, including locks, latches, hinges, closers, exit devices and protection plates beyond the 16-inch line.
• The door must latch positively every time it closes. A latch held retracted defeats the assembly unless it's part of a listed system with an approved release.
• The door must close by itself. Removing the closer or propping the door open breaks the rating in practice.
• Field modifications are limited. Small holes for surface-applied hardware are generally allowed; new mortise pockets or enlarged preps typically need factory work or a labeling service.
• Pairs usually need automatic or constant-latching flush bolts on the inactive leaf, plus a coordinator so the leaves close in the right sequence.

NFPA 80 also calls for fire door assemblies to be inspected and tested annually, and inspectors may ask to see that record. During our survey we identify rated doors, and we'll tell you directly if a requested change would put the label at risk. Sometimes the right answer is a factory-prepped replacement door rather than a field modification.

Finishes, materials and Southern California conditions

Finish designations come from BHMA, and a handful cover most commercial work:

• 626, satin chrome (the older US26D), the default on many commercial locks
• 630, satin stainless (US32D), common on plates, hinges and exterior trim
• 613, oil-rubbed bronze (US10B), dark and traditional
• 622, flat black, popular in newer interiors
• 605 and 606, bright and satin brass, still found in older buildings

Climate across our service area shapes the choice. Inland, across the Inland Empire and the Pomona Valley, summer sun bakes exterior hardware. Dark finishes on west- or south-facing levers can get hot enough to make people hesitate before grabbing them, and plated finishes fade. In north Orange County and the parts of southeast Los Angeles County closer to the ocean, damp marine air speeds corrosion of plated steel hinges and screws, so stainless parts pay for themselves. Foothill neighborhoods along the San Gabriel Valley's northern edge see wind and dust that grind into exposed cylinders.

Maintenance follows from those conditions: a dry lubricant made for locks in dusty areas, occasional cleaning of exposed plates and hinges, and a check of hinge screws after windy stretches. Choosing a finish that suits the door's exposure, instead of the one in the catalog photo, is one of the cheapest ways to make hardware last.

How an installation visit works

Commercial hardware jobs go smoothly when the measuring happens before the ordering. Our sequence:

• First contact. Call (951) 903-3193 or email info@julians-locksmith.com with the number of doors, their type and the problem. Photos of the lock, latch edge, hinges and any fire label help a great deal.
• Authorization. Before changing hardware on a commercial property, we confirm you have the authority to do it: ownership, a lease that permits it, or written approval from the property manager. California's Locksmith Act (Business and Professions Code section 6980 and following) governs this work, and Julian's Locksmith holds California locksmith company license LCO7891 from the Bureau of Security and Investigative Services, verifiable at search.dca.ca.gov.
• Survey. Each door gets measured for thickness, width, height, backset, bore and edge prep, hinge size and pattern, strike dimensions, handing and frame type, and we note fire labels and existing damage.
• Recommendation and quote. You receive a door-by-door plan covering grade, style, function, finish and supporting hardware, priced in full before anything is ordered.
• Ordering and keying. Common items are often in stock locally; particular mortise functions, finishes and cores may need lead time. Cylinders are keyed to your system ahead of installation day where possible.
• Installation. Hinges first, then the lock, then the strike set where the latch truly lands, then stops and plates, all mounted with proper fasteners: machine screws in tapped holes on steel, through-bolts or full-length screws into blocking on wood.
• Testing and records. We verify latching, egress, lever height, keys and functions, and leave a list of what went on each opening.

Most doors can be changed while the business stays open, and larger buildings can be phased.

What drives the cost

We price every job before starting, and the figure depends on a handful of variables:

• Grade and brand. Grade 1 mortise locks cost more than Grade 2 cylindrical locks, and premium manufacturers cost more than value lines.
• Lock style and existing prep. Reusing the existing prep is cheapest. Filler plates, new strike cutouts or re-prepped frames add labor, and changing a steel door from cylindrical to mortise can mean a new door.
• Function and keying. Indicator, classroom security and deadbolt functions, interchangeable cores, restricted keyways and master keying each affect the price.
• Finish. Satin chrome and stainless are easy; specialty finishes may cost more and take longer to arrive.
• Fire and code requirements. Listed hardware, labeled plates and accessibility corrections can add parts and time.
• Door and frame condition. Sagging doors, stripped hinge preps, split edges and rusted jambs need repair before new hardware can perform.
• Scope and scheduling. Several doors in one visit lower the per-door cost. Work that has to fit narrow windows, or that's phased across visits, gets planned into the quote.

We'll show you where spending less is reasonable, such as Grade 2 hardware on a rarely used closet, and where it isn't, such as an exterior door, a heavily used corridor door or anything carrying a fire label.

Where we work and when

Julian's Locksmith is a mobile locksmith, so the hardware and tools come to your building. We serve businesses throughout the Inland Empire, the San Gabriel Valley, the Pomona Valley, north Orange County and southeast Los Angeles County. Offices, warehouses, clinics, schools, churches, restaurants, apartment communities and retail tenants all have openings that benefit from properly specified hardware.

Our hours are 6:30 a.m. to 11:30 p.m., seven days a week. We're closed overnight, between 11:30 p.m. and 6:30 a.m. We are not a 24/7 service, but the early starts and late finishes let many businesses schedule installation before opening or after closing, so customers never notice a door was out of service.

When you call, tell us how many doors are involved, what they're made of, what's on them now and what's going wrong. We'll give you an honest sense of scope, schedule a survey, and quote the work before anything is ordered or drilled.