Magnetic Lock Installation in North Fontana: Glass, Double and Office Doors

What to know first in North Fontana

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.

What we can do on-site

• Frameless and tempered glass doors. Frameless glass has no stile, no hole and no margin for error. A glass-door bracket holds the armature plate with a clamp and rubber gaskets, and the magnet goes on a header, a sidelight or a mounting plate. We check glass thickness and pivot condition, because a sagging pivot defeats any magnet.
• Aluminum storefront doors and shear locks. Surface magnets on aluminum can look bulky, and thin extrusions flex when the door is pulled hard. Backing plates spread the load. A shear lock hides the whole mechanism in the header, which many retailers prefer. We explain the tradeoffs and the cost difference before you choose.
• Power supplies, battery backup and surge protection. Battery backup keeps a maglock holding through short outages and brownouts, though the batteries wear out and the door will release once they are exhausted. We size the battery to your preferences, explain the limits, and put a replacement date on the enclosure so the backup is not forgotten.
• 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.

How North Fontana shapes the job

Shopping-center tenants use maglocks mostly on stockroom, back-of-house and office doors, and sometimes on glass entry doors after hours. The storefront frame belongs to the landlord, and exit rules apply to the rear corridor too. In North Fontana centers we check delivery routes, fire alarm tie-ins and the way back doors are really used, because a maglock that traps an employee carrying inventory is a problem waiting to happen.

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.

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.

Example situations

• 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.
• Consider an office whose doors fell open during a blackout. The cause was a small plug-in adapter with no backup feeding two maglocks. We'd replace it with a fused, regulated supply, add battery backup so the doors hold through short outages, and recommend a mechanical keyed lock for off-hours security, so protection no longer hangs on one adapter.
• 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.
• Think of a boutique with frameless glass doors on patch fittings and a floor closer. The owner wants after-hours card access but doesn't want holes in the glass. We'd use a glass-door bracket to clamp the armature plate, mount the magnet on a header plate above the door, hide the cable in the soffit, and add a push button and sensor inside so the door always opens for anyone leaving.

From your call to the finished job

1. Survey the door, header and exit path. Before choosing a magnet, we check what you're attaching it to. A header that flexes, a door that sags or a closer that slams will undermine any lock. We note the problems and, if necessary, fix them before the lock goes in.
2. 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.
3. Mount the magnet and armature plate. We mark the layout, drill and anchor the bracket or backing plate into solid material, and mount the magnet square to the door. The plate goes on the door with through-bolts and a flexible bushing so it can seat flat against the magnet face, and we tighten everything to specification.
4. Run the power, sensors and fire alarm release. The push button interrupts lock power directly, the sensor does the same through its relay, and the fire alarm relay does it for the building. We test each one independently by operating it with the others disconnected.
5. 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.
6. 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.

What affects the cost

• Door type and mounting hardware. Heavy glass, wide double doors and odd headers all add to hardware needs. We would rather quote a solid kit that holds than a cheap bracket that flexes, because a flexing bracket costs holding force and, sooner or later, trust.
• Holding force and number of leaves. Each additional leaf or door adds a lock, a plate, brackets and wiring. Several doors in one visit share survey time and programming, which lowers the cost per door, but we still quote each opening separately so you can approve some doors now and others later.
• Permits, inspections and timing. Scheduling flexibility helps. Work done in one planned visit during normal hours is simpler than a rushed one. We start at 6:30 a.m. every day, so many installs can be finished before a business opens. Tell us about inspection dates, tenant move-ins and opening days early, because our proposed schedule works backward from those.

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 North Fontana.

Mistakes to avoid

• Assuming holding force equals security. A 1,200-pound magnet on a door with weak hinges, a thin frame or a gap at the edge can still be forced somewhere else. The door, the frame and the hinges matter as much as the magnet.
• 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.
• 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.

What to do before we arrive

• Replace backup batteries on a schedule. A sealed battery typically needs replacing every few years, and a tired one may carry the lock for a short time instead of hours. Write the install date on the battery itself and put the next replacement on your calendar.
• 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.
• 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.
• Don't plan a maglock for a door that must stay latched in a fire. Rated doors, stair enclosures and some corridors have specific rules. Ask your fire marshal or building department before you buy hardware, and tell your installer what the door is and where it leads.

Reaching North Fontana

North Fontana is about 14 miles from our San Bernardino base, roughly 19 minutes in light traffic via Palm Ave to I-215 North. When you call, you get an arrival estimate based on where the technician is and the traffic at that moment.

Our path into North Fontana depends on where the previous job wrapped up. Sometimes that's a straight run via Lytle Creek Road; other times it's surface streets the whole way. Either way, you get a heads-up call when the technician is close.

About North Fontana: North Fontana has no separate census count; the city of Fontana as a whole recorded 208,393 residents in the 2020 census.

Business lock or door work in North Fontana?

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.