Through-bolted wrap-around or surface mount
ANSI/SDI A250.6 · NFPA 80
Maryland, DC & Northern Virginia
Door reinforcement plates are steel or brass plates that wrap around or cover the weak spots of a door. Most break-ins target the thin wood or metal near the lock, the strike and the hinges. A plate spreads the force of a kick or pry bar across a wider area. It also covers old, oversized holes after a lock change. We fit plates to wood, hollow metal and aluminum doors, and we match the finish to your existing hardware so the door still looks clean.
A steel plate spreads impact force so the door edge will not split at the lock.
Covering the latch gap keeps crowbars and screwdrivers from reaching the bolt or forcing the strike.
Plates hide worn or oversized lock holes, so you keep the door and skip a replacement.
King Locksmith And Doors Inc. is a commercial locksmith and door company serving Maryland, Washington DC and Northern Virginia. Our technicians install and repair door hardware for offices, government buildings, hospitals, hotels and schools. We size each plate to your lock and door thickness so it fits the first time. We check the door, the frame and the lock together, not just the plate. That way the fix lasts, and the door still passes inspection.
The right plate depends on your door material, lock type and the kind of attack you worry about most. Use these five points to narrow your options before our technician measures the door on site.
Wood doors split along the grain when kicked, so they need a wrap-around plate that covers both faces and the edge. Hollow metal doors dent and tear at the lock prep, so a thicker plate or an internal reinforcer works better.
Aluminum storefront doors have narrow stiles, so they often need a slim latch guard instead of a full wrap. Before we drill a single hole, we check the door core and its exact thickness.
Cylindrical locks and deadbolts use a round bore, so they take a standard wrap-around plate with a center hole. Mortise locks sit in a deep pocket in the door edge, and they need a plate cut for the lock body and trim.
Exit devices and electrified locks have their own rules. A plate must not block wires, rods or the latch path. We match the cutout to your exact hardware, down to the screw holes.
A back door in an alley faces different risks than an office suite door. Kick-ins call for a full wrap-around plate and a long strike reinforcer. Pry attacks call for a latch guard that covers the gap at the door edge.
For high-risk rooms, such as server rooms, pharmacies and cash offices, we combine plates with hinge reinforcement and security screws. Layered protection makes forced entry slow, loud and harder to finish before help arrives.
Many commercial doors carry a fire label on the hinge edge. Under NFPA 80, you cannot drill or add hardware to these doors in ways that void that label. The wrong plate or extra holes can fail your next inspection.
We use plates listed for fire-rated openings and follow the door maker’s rules for mounting. That keeps your door secure, your label valid and your fire marshal satisfied. It also saves a costly door replacement.
Reinforcement plates come in finishes such as satin stainless, satin chrome, bright brass and oil-rubbed bronze. Matching the finish to your lever and hinges keeps lobbies, patient rooms and guest floors looking professional.
Fit matters as much as looks. The plate must match door thickness, usually 1-3/4 inches on commercial doors, and your backset. We measure both before ordering, so it fits the first time. A loose plate rattles; a tight one binds the latch.
A standard strike plate ships with almost every lock, but it only protects the frame. Here is how a full reinforcement plate compares on the five points that matter most.
Consideration
Door Reinforcement Plates
Standard Strike Plates
Spreads force across the whole lock area
Small plate; door edge can still split
Wraps both faces and the door edge
Covers only the frame, not the door
Shields the latch and lock from tools
Leaves the latch gap open to pry bars
Hides worn, stripped or oversized lock holes
Cannot cover damage on the door itself
Through-bolts tie both door faces together
Short screws often grip only the jamb
Even a good plate can fail if it is the wrong size or poorly installed. These are the problems we see most often on commercial doors across the DMV area.
We install steel wrap-around plates on wood and metal doors to stop kick-ins right at the lock.
We add heavy-duty strike plates and long screws that anchor into wall framing, not just the jamb.
We mount latch guards on outswing doors to cover the latch gap and block common pry-bar attacks.
We add hinge reinforcement and security studs so outswing doors stay put even with the pins removed.
We repair split edges and stripped lock holes, then cover them with a plate sized to fit.
We install listed plates on fire-rated doors and keep your openings ready for annual NFPA 80 inspections.
Get a free site assessment and a clear quote for door reinforcement plates anywhere in Maryland, DC or Northern Virginia.
