Bradbury, Los Angeles County
Magnetic Lock Installation in Bradbury: Glass, Double and Office Doors
Short answer: Magnetic lock installation in Bradbury puts an electromagnet on the door frame header and a steel armature plate on the door. Power holds them together; cut the power and the door is free. We choose the holding force, mount both parts squarely, wire the power supply and release devices, and test that the door opens every way it must.

Double glass doors are the front entrance of many offices, studios and small clinics. They rarely have a lock worth keeping, and landlords rarely want them replaced. Magnetic lock installation in Bradbury lets a tenant add card or keypad entry to the doors already there, using two magnets or a double-door unit and a pair of armature plates. We look at the header depth, the glass, the closers and the hinges, then pick brackets that fit what is actually there. Your entrance keeps looking like your entrance, and the key drops out of the equation.
Magnetic Lock Installation in Bradbury: what to expect
A magnetic lock has two parts. The electromagnet, a steel housing with a coil inside, mounts to the frame, usually on the header above the door. The armature plate, a flat piece of steel, mounts to the door at the matching spot. When the coil is energized, the plate is pulled onto the magnet face with a rated holding force, commonly around 600 pounds on single-door models and 1,200 pounds or more on heavy-duty ones. Cut the power and the magnetism collapses, so there is nothing to retract and nothing to turn. The plate sits on a flexible bushing so it can seat flat against the magnet even if the door moves a little. Small things matter. A gap the thickness of a business card cuts holding force, paint or rust on the faces weakens the grip, and a plate that is out of alignment can leave a door that looks locked but pulls open with a firm tug. Good magnetic lock installation is mostly alignment, solid fastening and clean wiring.
Work included on a typical visit
- Inswing doors, brackets and offset mounts. Not every door suits a maglock, and inswing doors are where we are most careful. Sometimes a bracket solves it neatly. Sometimes the geometry points toward an electric strike or other electrified hardware instead. We tell you which before anything is drilled.
- Frameless and tempered glass doors. Tempered glass can't be drilled or cut after it is made, so glass-door maglocks use clamp brackets that grip the glass edge without holes. We pad the clamps, tighten them evenly, and mount the magnet on a header or bracket that can carry the load. Nobody should drill your glass.
- Fire alarm release and code review. Where a fire alarm panel exists, the maglock must drop out when it sounds. We wire the lock's supply through a relay or listed release, document it, and coordinate testing with whoever services your alarm. The panel connection itself may need a fire alarm or low-voltage contractor.
- Readers, keypads and controllers. A reader or keypad tells the controller to release the lock for a few seconds. We connect the reader, controller and lock, set the release time, and configure schedules and credentials. Cards or codes can be canceled instantly, which is far easier than rekeying a door.
- Door position switches, bond sensors and monitoring. A door-position switch tells the system whether the door is open or closed. A bond sensor, built into many magnets, reports whether the plate is actually seated against the magnet. Together they separate a door that is closed from one that is truly secure. We wire them to your controller or alarm if you want status or alerts.
Local factors in Bradbury
Wind, brushfire and planned power shutoffs are part of life in foothill communities. A maglock releases when power fails, so a long outage can leave a door unlocked unless you plan for it. We add battery backup sized for realistic outages, suggest a mechanical key lock for off-hours security where the rules permit, and explain what the door will do at each stage so you are never surprised.
Large homes use maglocks less often than commercial sites, but there are cases: a wine room with a glass door, a home gym, a safe room or a pool house. Residential doors aren't governed by commercial exit rules in the same way, though a safe exit still matters. We discuss appearance, hide the wiring, choose quiet hardware and make sure anyone inside can leave even if the controller or phone app stops responding.
Inland heat stresses power supplies, batteries and plastic parts. A supply in an unvented ceiling can run hot and fail, and backup batteries age faster. Glass and aluminum doors expand in afternoon sun, which can shift plate alignment slightly through the day. We mount supplies where air moves, check alignment hot as well as cool, and put a battery replacement date on the label.
Common situations
- For example, a fitness studio has double glass doors off a shared hallway near Angeles National Forest. Members badge in, and the owner wants evening entry without handing out keys. We'd fit a magnet on each leaf, wire both to a card reader and controller, add sensors and a push button inside, and connect a fire alarm relay with the landlord's alarm contractor.
- Picture a records room in a clinic. Only certain staff should enter, and the door is rarely used but must be monitored. We'd install a maglock with a bond sensor and a door-position switch, a reader outside and an exit sensor inside, plus an entry log, so the office manager can tell when the door was opened and whether it was left unsecured.
- Say an earlier installer put a maglock on an office door with a card reader and nothing else. There is no exit button, no sensor and no link to the fire alarm. We'd survey the door, explain what is missing, add a sensor, a push button and a release relay, and tell you honestly which parts the building official will care about.
- Suppose a heavy glass door slowly sags on its pivots, so the plate no longer meets the magnet squarely and the door pulls open with a firm tug. The lock isn't weak; the door has moved. We'd adjust or replace the hardware that holds the door, realign the plate, and confirm full contact before blaming the magnet.
Step by step with Julian's Locksmith
- Survey the door, header and exit path. On site we measure door thickness and swing, header depth and ceiling access for cable. We ask who uses the door, when and how, and where the fire alarm panel and power sources are. Photos before the visit help, but nothing replaces seeing the door.
- Design the release path and quote. We decide which magnet or magnets, which brackets and which release devices the door needs: sensor, button, fire alarm relay and credentials. The written quote shows each piece and flags anything that needs an electrician, fire alarm contractor or building official before work begins.
- Mount the magnet and armature plate. Mounting is about alignment and solid anchorage. We check that the plate meets the magnet fully with the door closed and under slight pressure, that fasteners are tight and that nothing rattles loose. Glass doors use clamps; metal and wood doors use through-bolts.
- Run the power, sensors and fire alarm release. Low-voltage cable runs from the lock to the power supply, sensors, button and controller. We route it through the ceiling or a raceway, keep power and signal wires neatly separated, and label both ends. Fire alarm relays go in the lock's power line and are tested with the alarm contractor.
- Program credentials and set the timers. We set the door-held-open alarm, the lock's release delay and the sensor's hold time so they work together. Then we check that a credential, a button press and a sensor trigger each behave properly when tried separately and in sequence.
- Test every release and hand over. We walk through the door as a stranger would, looking for anything confusing. Then we show your staff the button and the sensor, give you the wiring record and tell you who to call about the alarm panel.
How we quote the job
- Door type and mounting hardware. A steel outswing door with a solid header is the simplest mounting. Glass doors need clamp brackets, inswing doors need offset kits, and aluminum storefronts may need backing plates or a concealed shear lock. Mounting hardware is often the biggest single part of the price, so we choose it first.
- Holding force and number of leaves. Maglocks come in different holding forces, and heavier-duty models cost more. Double doors need two locks. We match the magnet to the door and the risk instead of reaching for the biggest number, and we explain what holding force does and doesn't say about security.
- Power supply, backup and controller. Maglocks draw power continuously, so the supply is a real component. A fused, regulated supply costs more than a plug-in adapter and does the job properly. Battery backup, a controller and readers add more. We build the list so you can add or skip items.
Every job gets a clear quote before any work starts. Call (951) 903-3193 with the details and we'll tell you what to expect for your situation in Bradbury.
Advice before you book
- Take photos of the top of the door, the header above it and the edge of the door. Include any glass stops, closers or conduit in view. With those we can often pick the bracket kit and the mounting approach before we arrive.
- Review who holds access a few times a year. Cards and codes pile up as staff, vendors and contractors come and go, and every extra credential is a door that opens for someone. Remove what you no longer need and keep a short list of current holders.
- Walk the door as it stands. Does it close fully by itself? Does it sag? Does the closer slam it? A maglock can't fix a door that doesn't meet the frame. Adjust the hinges and closer first, because the plate and magnet need to meet flat every time.
- Keep the magnet and plate faces clean. Wipe them with a dry cloth. Paint, tape, stickers and grease all widen the gap and reduce holding force. Never paint the faces, and don't cover them with decorative trim. A magnet that seems to have lost its grip is often just dirty or misaligned, so check those first.
Common errors that cost time and money
- Skipping the alignment check. A plate that sits at an angle, or a gap wider than a business card, delivers only a fraction of the rated holding force. Tighten the plate with the door closed, then confirm the faces meet fully.
- Using a maglock where the door must stay latched. Fire-rated doors, some stairwells and other openings need hardware that latches positively, which a maglock does not do. Ask your building department before you specify one. If you are not sure how your door is classified, look for a label on the edge of the door or frame.
- Powering the lock from a cheap plug-in adapter. Adapters sag, overheat and fail, and when they do the door opens or the lock buzzes. Use a fused, regulated supply with suppression, in a ventilated spot, with labeled wiring. Voltage that sags under load also weakens the magnet, long before the supply fails outright.
Getting to Bradbury
Bradbury is about 44 miles from our San Bernardino base, roughly 48 minutes in light traffic via I-215 South to SR-210 West. When you call, you get an arrival estimate based on where the technician is and the traffic at that moment.
Our path into Bradbury depends on where the previous job wrapped up. Sometimes that's a straight run via I-210; other times it's surface streets the whole way. Either way, you get a heads-up call when the technician is close.
About Bradbury: Entry to Louis Bradbury's original estate passed through wrought-iron gates on what is now Deodar Lane, and his home and garden stood where the Royal Oaks Manor campus is today.
| Neighborhoods | Deodar Lane, Bradbury Estates, Bradbury Hills Road, Woodlyn Lane, Mount Olive Drive, Royal Oaks Drive North |
|---|---|
| ZIP codes | 91008, 91010 |
| Main routes | I-210, I-605, Huntington Drive, Royal Oaks Drive |
| From our San Bernardino base | about 44 miles via I-215 South to SR-210 West (Foothill Freeway), continuing onto I-210 West through Glendora, Azusa and Irwindale; exit Mount Olive Drive in Duarte and follow it north into Bradbury |
Business lock or door work in Bradbury?
Call (951) 903-3193 with the address, the doors or hardware involved and when the site is open. We'll quote the job before any work starts and book a time within our hours that suits your schedule.
Frequently asked questions
Can you fix a magnetic lock that another installer put in?
Often. We check the mounting, the power supply and the exit chain: sensor, button and fire alarm release. Missing exit devices, weak brackets and marginal power are common. We explain what we found, what needs changing to make the door safe, and what your building official may want to see.
What happens to a maglock when the power goes out?
It lets go. A magnetic lock holds only while powered, so a blackout, tripped breaker or failed supply releases the door unless battery backup keeps it energized. That is good for exit safety and a risk for security. We discuss backup batteries, a mechanical key lock for off-hours and, if the door must stay locked, a strike or electrified lockset instead.
How do you confirm I'm allowed to modify my door?
Before we modify a door or lock, we verify ID and proof that you own, lease or manage the property, and tenants should have their landlord's approval for drilling the frame. It protects you as well as us. Our license is LCO7891, issued by BSIS, and you can verify it at search.dca.ca.gov.
Can a magnetic lock work on double doors?
Yes. Double doors use either two magnets, one on each leaf, or a combined unit for pairs, with a plan for the inactive leaf. Both locks release together on one circuit, and the exit sensor and button must cover whichever leaf people will use to leave. We map that out during the survey.
Do I need both a motion sensor and a push button?
On most exit doors, yes. The sensor releases the lock when someone approaches; the push button is a second, independent route that interrupts power directly. Some jurisdictions require both, and a single device is a single point of failure. Your fire marshal or building department has the last word, and we build to what they expect.
Will a card reader or keypad work with a magnetic lock?
Yes. A reader or keypad signals a controller, which releases the lock for a few seconds. Cards, fobs, PIN codes and mobile credentials all work, as long as the controller's relay is rated for the lock. We connect the reader, set release times and programming, and test each credential type before we leave.
How far is Bradbury from your base?
Bradbury is about 44 miles from our San Bernardino base, roughly 48 minutes in light traffic. Arrival time depends on traffic and on the job the technician is finishing, so we give you an estimate on the phone before you commit.
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