Builders Hardware: Complete Guide to Commercial Door Trim and Accessories

Builders hardware is the category of commercial door components that rounds out a complete hardware set: the protective plates that keep door faces looking intact after years of cart traffic, the door stops that prevent lever handles from punching through drywall, the flush bolts that secure the inactive leaf of a double door so the active leaf can latch properly, and the coordinators that enforce the closing sequence when that sequencing is the difference between fire door compliance and failure. None of these components are as technically complex as a commercial mortise lock or a panic exit device. But every one of them can cause an inspection failure, a hardware return, or a real-world problem that the original specification did not anticipate. This guide covers the major builders hardware categories, the sizing and specification rules that apply to each, the coordination requirements for double-door assemblies, and the brands stocked at American Locksets since 2001.

What Is Builders Hardware?

Builders hardware, also called architectural door trim and door hardware accessories, is the Division 8 specification category covering all supplemental door hardware components that are not the primary locking, closing, or exiting mechanism. The category includes protective plates (kick plates, mop plates, push plates, armor plates), door stops and holders (wall stops, floor stops, overhead stops), flush bolts and coordinators for paired-door assemblies, surface bolts, door silencers, and miscellaneous trim items.

Most builders hardware products fall under ANSI/BHMA A156.6, the Architectural Door Trim standard. A156.6 defines material performance requirements, finish durability benchmarks, fastener system specifications, and dimensional tolerances for protective plates, push plates, pull plates, push-pull bars, and related items. Door stops and holders are governed by ANSI/BHMA A156.16. Flush bolts and coordinators for fire-rated assemblies operate under ANSI/BHMA A156.3 and NFPA 80.

Understanding which standard governs which product matters because fire-rated assemblies require components that are listed for use in rated assemblies. A standard kick plate on a non-fire-rated door is a clear size-and-finish specification. The same kick plate on a fire-rated door must comply with NFPA 80 Section 6.4.5.1, which requires the plate to be listed for the fire door assembly. This single code detail changes the specification on a significant portion of commercial projects.

Protective Plates: Kick Plates, Mop Plates, Push Plates and Armor Plates

Protective plates shield door faces from the concentrated impact and abrasion that daily use creates. The correct plate type depends on the location of the impact zone on the door and the severity of the abuse environment.

Kick Plates

A kick plate mounts on the push side of a door at the base, protecting against foot impact, cart strikes, and equipment contact. Standard commercial kick plate heights range from 6 to 10 inches, covering the zone from the floor up through the area most commonly struck by feet and carts. Width is typically 2 inches less than the door width on each side, leaving space for the door frame. The standard finish for commercial applications is US32D satin stainless (Type 304), which is durable, easy to clean, and matches the most common commercial hardware finish schedule.

Gauge matters significantly on kick plates. The standard specification is 0.050 inch (18 gauge) stainless steel. In high-abuse environments such as hospital corridors, school cafeterias, and food service facilities where cart traffic is heavy and daily, 0.125 inch (10 gauge) plates provide approximately 2.5 times the dent resistance of standard gauge. Ives 8400 Series kick plates are stocked at American Locksets in multiple sizes and finishes including satin stainless, bright brass, and dark bronze to match adjacent hardware.

Mop Plates

A mop plate is a kick plate with a reduced height, typically 4 to 6 inches, designed for locations where the impact zone is concentrated at the very base of the door. Janitorial closets, food service prep areas, and utility rooms where mop heads contact the door repeatedly at floor level are the standard mop plate applications. Mop plates use the same material and finish specifications as kick plates but cover a narrower zone. Specifying a full-height kick plate in a janitorial closet is an overspec that costs money without providing meaningful additional protection. Specifying a mop plate on a hospital corridor door where carts strike the door face up to 10 inches from the floor is an underspec that leaves the upper impact zone unprotected.

Push Plates

A push plate mounts on the push side of a door at hand height, protecting the door face from the concentrated wear that repeated hand contact creates. The standard commercial push plate is 4 inches by 16 inches, which covers the hand contact zone on most commercial doors. For aluminum storefront and glass doors where the door face itself is the push surface, push plates often serve an ADA accessibility function by providing a visible, tactile indicator of the correct push point.

ADA Standards Section 309 and ICC A117.1 require operable door hardware to be mounted between 15 and 48 inches above the finished floor. Push plate mounting must comply with this range. On fire-rated doors, NFPA 80 requires push plates to carry a UL listing for fire door use. The 16-inch unlabeled exception that many installers assume applies does not cover plates mounted in the hand-contact zone at handle height. Cal-Royal, Ives, and Hager push plates stocked at American Locksets are available in fire-rated configurations for rated-door applications. The complete push plates and pull plates catalog is in the push plates section.

Armor Plates

An armor plate extends from near the floor to above handle height, combining kick plate and push plate protection in a single continuous sheet. Armor plates are the correct specification for hospital corridors, school cafeterias, care facility hallways, and any high-traffic institutional environment where the entire lower door face is subject to constant impact from carts, wheelchairs, equipment, and foot traffic. The armor plate eliminates the gap between a kick plate and a push plate that would otherwise remain unprotected at mid-door height. Standard armor plate heights range from 34 to 48 inches.

Plate Type	Height Range	Standard Application	Gauge
Mop plate	4 to 6 inches	Janitorial closets, food prep	0.050" standard
Kick plate	6 to 16 inches	Commercial corridors, entries	0.050" standard, 0.125" heavy
Push plate	4" x 16" standard	Push side at hand height	0.050" to 0.090"
Armor plate	34 to 48 inches	Hospital, school, institutional	0.050" to 0.125"

Door Stops and Holders: Wall, Floor and Overhead Types

A door stop prevents a door from swinging open far enough to contact the wall, adjacent hardware, or the door closer arm. The choice between wall stop, floor stop, and overhead stop depends on the door's swing path, the floor and wall construction, and whether hold-open function is also needed.

Wall Stops

A wall stop mounts on the wall surface in the path of the door edge or the door handle. It is the simplest and least expensive door stop specification and is correct for most standard interior doors where the wall behind the open door is accessible and structurally sound enough to accept fasteners. Hager 210 rigid base and Hager 211 flexible base wall stops are stocked at American Locksets. The Hager 211 flexible base absorbs impact energy through a rubber-backed plate before it reaches the wall, which reduces the noise and potential damage from frequent door contact in high-traffic openings.

Floor Stops

A floor stop mounts on the floor in the path of the door edge or door base. Floor stops are specified when the wall behind the open door is not accessible, when the door swings past a wall corner, or when the door opens into a corridor where a wall stop would project into the pedestrian path. Hager floor stops, including dome stops and rigid-post configurations, cover standard commercial floor stop applications at American Locksets. The dome stop profile is the standard specification because the low-profile dome shape is less likely to catch foot traffic than a post-type stop and is easier to clean around in high-traffic environments.

Overhead Stops and Holders

An overhead stop mounts in the door frame head and uses an arm connected to the door to limit opening travel. It is specified when neither a wall stop nor a floor stop is practical due to geometry, clearance constraints, or floor material that does not accept anchor fasteners. Overhead stops can include a hold-open function that holds the door open at a set angle without a separate holder device. Overhead stop and holder combinations are useful in high-traffic corridors where the door needs to stay open during peak traffic periods and return to closed at other times without a power operator. All stops and holders at American Locksets ship from the door stops and holders section.

Flush Bolts: Manual, Automatic and Constant Latching

Flush bolts secure the inactive leaf of a double door by projecting steel rods into strikes at the top of the door frame header and at the floor. Without flush bolts, the inactive leaf would move independently and the active leaf's latch would have nothing to latch against. Flush bolts are one of the most frequently misspecified components in double-door hardware sets, particularly on fire-rated assemblies where the flush bolt type determines both code compliance and operational behavior.

Manual Flush Bolts

A manual flush bolt is operated by hand. The user slides a lever or knob to extend or retract the rod into the header strike and floor strike. Manual flush bolts are acceptable on non-fire-rated double doors and on fire-rated double doors that serve storage or equipment rooms where the occupants actively manage the door state. On fire-rated egress paths, NFPA 101 and IBC generally prohibit manual flush bolts because they require deliberate user action to engage, which means the inactive leaf could remain unlatched if the last person through the door does not manually shoot the bolt. Ives and Hager manual flush bolts for hollow metal and aluminum door applications are stocked at American Locksets in the manual flush bolts section.

Automatic Flush Bolts

An automatic flush bolt projects its rods automatically when the active leaf closes. When the active leaf swings shut, it contacts a trigger on the inactive leaf flush bolt, which causes the bolts to extend into the header and floor strikes. When the active leaf opens, the bolts retract automatically, freeing the inactive leaf. The occupant does not take any deliberate action to secure or release the inactive leaf. This automatic operation is why automatic flush bolts are required on most fire-rated egress double doors. NFPA 101 and IBC require that the inactive leaf latch automatically so that occupants do not need to manually secure the door during evacuation. A coordinator is required whenever automatic flush bolts are used, because the inactive leaf must close before the active leaf engages the triggers.

Constant Latching Flush Bolts

A constant latching flush bolt has an automatic bolt at the bottom of the inactive leaf and a spring-loaded manual bolt at the top that remains engaged until manually retracted. The bottom bolt operates automatically on active leaf closing, while the top bolt is manually retracted when the inactive leaf needs to be opened. This configuration provides higher security than standard automatic flush bolts because the inactive leaf is positively bolted at the top even when the active leaf is open. The trade-off is that the top bolt requires manual operation, which must be accessible within ADA reach range. A coordinator is also required for constant latching applications.

Door Coordinators: The Most Misunderstood Double-Door Component

A door coordinator is a mechanical device mounted under the frame head that controls the closing sequence of a paired door assembly. Its sole function is to ensure the inactive leaf closes before the active leaf on every cycle. This sequencing is required whenever the inactive leaf has automatic flush bolts, constant latching flush bolts, or an overlapping astragal, because all three conditions require the inactive leaf to be in position before the active leaf closes and latches.

Without a coordinator, both leaves close simultaneously or in random sequence depending on which one the person released last. If the active leaf closes before the inactive leaf's bolts engage the strikes, the active leaf latches against an unsecured partner. On fire-rated assemblies, this means both leaves are not positively latched, which is a NFPA 80 violation that will fail a fire door inspection. On non-rated assemblies, it means the inactive leaf does not close fully, leaving a gap at the meeting stile that defeats the purpose of the double door configuration.

The coordinator works by holding the active leaf open with a release arm until the inactive leaf is fully closed and latched. As the inactive leaf swings into its strike and the bolts engage, the coordinator releases the active leaf to close. The mechanism is purely mechanical and operates on every cycle without any power or programming. Hager flush bolt and coordinator sets are stocked at American Locksets for standard commercial double-door applications. When specifying coordinators, always confirm leaf width and handing because the coordinator arm must be mounted to hold back the correct leaf. Unequal-leaf pairs require particular attention to ensure the wider leaf closes first and the coordinator geometry matches the specific leaf configuration. The complete flush bolts and coordinators range is available alongside keypad and proximity locks and the full hardware line at American Locksets.

The Coordinator Sequencing Error That Fails Fire Door Inspections

The most consistent builders hardware error on double-door projects is installing a coordinator on the wrong leaf, or installing automatic flush bolts without a coordinator at all. Both produce the same visible symptom: the active leaf closes into an unsecured inactive leaf, leaving a visible gap at the meeting stile and creating a latch binding condition that prevents both leaves from positively latching.

Here is exactly what happens when the sequence is wrong. A double fire door is installed with automatic flush bolts on the inactive leaf and a coordinator. The coordinator arm is inadvertently mounted to hold back the inactive leaf rather than the active leaf. Now the coordinator is holding back the inactive leaf, which is the leaf that needs to close first. The active leaf closes first instead. The active leaf latch engages the active leaf strike, but the inactive leaf's automatic flush bolts never received the trigger signal from the active leaf closing because the active leaf arrived before the inactive leaf was in position. The inactive leaf sits ajar. The inspector checks the double door assembly, finds both leaves not positively latched, and the entire assembly fails NFPA 80 compliance.

The field fix is simple once the diagnosis is correct: reverse the coordinator arm to hold back the active leaf instead of the inactive leaf. But the diagnostic step is where installations stall. Coordinators are not well-understood in the field, and a symptom that looks like a strike adjustment problem or a flush bolt rod length problem is often actually a coordinator mounting error. American Locksets includes coordinator mounting orientation guidance with every double-door hardware order that includes automatic flush bolts. Call 877-471-4870 before ordering any double-door set where the coordinator mounting orientation is unclear.

Door Silencers and Surface Bolts

Door silencers are small rubber or neoprene buttons pressed into holes in the door frame stop. When the door closes, the silencer contacts the door face and prevents the metal-to-metal impact that produces the sharp slamming sound on hollow metal door assemblies. The standard commercial specification is three silencers per single door: two on the strike jamb and one on the hinge jamb. On fire-rated doors, silencers must be listed for fire door use. Standard catalog silencers that are not fire-listed do not belong on rated assemblies regardless of how minor the component seems.

Surface bolts are manually operated bolts that slide horizontally across the door face to engage a strike on the door frame or floor. They are used to secure inactive leaves that do not require the automatic operation of flush bolts, for doors requiring a secondary security function beyond the primary lockset, and for gates and cabinet doors. NFPA 101 and IBC limit surface bolt use on fire-rated egress doors to storage and equipment room applications where the occupant count and egress requirements permit manual operation of the inactive leaf.

Why Choose American Locksets for Builders Hardware

American Locksets has been an authorized commercial hardware distributor since 2001, stocking builders hardware from Ives, Hager, Cal-Royal, and other leading brands across the full range of protective plates, door stops, flush bolts, and coordinators. The complete builders hardware catalog, including kick plates, mop plates, push plates, armor plates, wall and floor stops, manual and automatic flush bolts, coordinators, surface bolts, and door silencers, is in the builders hardware section at American Locksets. Same-day shipping on stocked configurations.

Builders hardware at American Locksets ships alongside commercial mortise locks and lever sets, commercial door hinges, commercial door closers, exit devices and panic hardware, and continuous geared hinges on a single authorized dealer order. For help specifying the correct flush bolt type, coordinator configuration, or protective plate gauge for a specific project, call 877-471-4870 before ordering.

Frequently Asked Questions About Builders Hardware

What is the difference between a kick plate, mop plate, and armor plate?

All three are protective plates that mount on the push side of a door to shield the door face from impact damage. A mop plate is 4 to 6 inches tall and used where mop heads contact the door base in janitorial areas. A kick plate is 6 to 16 inches tall and used in standard commercial corridors and entries to protect against foot and cart impact. An armor plate extends from near the floor to 34 to 48 inches tall, covering the entire lower door face and eliminating the gap between kick and push plate protection. Armor plates are the standard specification for hospital corridors, school cafeterias, and high-abuse institutional environments.

When is a door coordinator required?

A coordinator is required on any paired door assembly where the inactive leaf has automatic flush bolts, constant latching flush bolts, or an overlapping astragal. These conditions require the inactive leaf to close before the active leaf. Without a coordinator enforcing this sequence, both leaves close in random order and the inactive leaf may not latch before the active leaf engages, leaving both leaves unsecured. On fire-rated paired doors, a failing closing sequence is a NFPA 80 violation that fails fire door inspection.

What is the difference between manual, automatic, and constant latching flush bolts?

A manual flush bolt requires the user to slide a lever or knob to extend and retract the rods. Acceptable on non-fire-rated double doors and storage room fire doors. An automatic flush bolt extends and retracts automatically based on whether the active leaf is open or closed. Required on most fire-rated egress double doors where NFPA 101 and IBC require the inactive leaf to latch without user action. A constant latching flush bolt has an automatic bottom bolt and a manually retracted top bolt, providing higher security than fully automatic bolts but requiring manual operation to open the inactive leaf.

What gauge kick plate should I specify for a commercial door?

Standard commercial kick plates are 0.050 inch (18 gauge) stainless steel, which is the correct specification for most commercial corridor and entry doors with normal cart and foot traffic. For high-abuse environments such as hospital corridors, school cafeterias, and loading areas with heavy cart traffic, specify 0.125 inch (10 gauge) heavy-duty kick plates that provide approximately 2.5 times the dent resistance of standard gauge. The standard commercial finish is US32D satin stainless, which resists corrosion, cleans easily, and matches common hardware schedules.

Are kick plates required on fire-rated doors?

Kick plates are not universally required on fire-rated doors, but when they are specified on a fire-rated assembly, they must carry a UL listing for fire door use under NFPA 80 Section 6.4.5.1. Standard unlisted kick plates are not acceptable on fire door assemblies regardless of their size or position on the door. The same requirement applies to push plates, pull plates, and armor plates on rated assemblies. When specifying any protective plate on a fire door, confirm the product's fire door listing before ordering.

What are door silencers and where do they go?

Door silencers are small rubber or neoprene buttons pressed into holes in the door frame stop that prevent metal-to-metal contact when a hollow metal door closes. The standard commercial specification is three silencers per single door: two on the strike jamb stop and one on the hinge jamb stop. On fire-rated doors, silencers must be listed for fire door use. Non-listed silencers are not acceptable on rated assemblies. Silencers significantly reduce door slam noise in occupied commercial buildings and extend the life of the door face finish at the contact point.

Which builders hardware brands does American Locksets carry?

American Locksets stocks builders hardware from Ives (8400 Series kick plates, mop plates, push plates, flush bolts, coordinators, stops), Hager (kick plates, floor stops, wall stops, flush bolt and coordinator sets), and Cal-Royal (protective plates and door trim). Manual flush bolts are available from Ives, PDQ, Hager, and Rockwood. Same-day shipping on stocked configurations. The complete catalog is in the builders hardware section at American Locksets with specification support at 877-471-4870.