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Keycard Access Installation for Stafford Office-Warehouse and Flex Buildings
A typical Stafford flex suite has a glass storefront up front, a steel man-door out back and a roll-up dock door in between — three openings that each need different keycard hardware. This is the door-by-door engineering behind a keycard system that locks reliably, lets people out safely, and survives a concrete building.
What actually gets installed at a keycard door
A keycard door is not a reader screwed to the wall. It is a small circuit of six parts, and when one is chosen badly the door refuses to lock, refuses to release, or throws false alarms all night.
- Reader — energizes the card or fob, reads its number and passes it on. Mounted on the secure side, latch side, within normal reach height.
- Controller — stores valid cards and schedules, decides yes or no, fires a relay and logs the event.
- Electrified locking hardware — electric strike, magnetic lock, electrified lever lock or electrified exit device: the part that physically holds the door.
- Door position switch — a magnetic contact recessed in the frame head. Without it the system cannot flag a propped or forced door.
- Request-to-exit device — a motion sensor, button or panic-bar switch telling the controller someone is leaving from inside, so a normal exit isn’t logged as a break-in.
- Lock power supply — dedicated, battery-backed, sized for every lock it feeds, with a fire alarm release input where required.
Card presented, number checked against the user list and schedule, relay fired for a few seconds, contact confirms the door closed again — each step timestamped in the audit log. For most Stafford businesses that log is the point: once a card can be switched off from a browser, nobody wonders how many copies of the back-door key are still around.
Door by door: the hardware each Stafford opening needs
Stafford is known for its concentration of business parks and light-industrial flex space around US-59/I-69, US-90A and Murphy Road. The buildings vary, but the doors repeat. This is how we approach each one.
| Opening | What is usually there now | Typical keycard approach | What to watch |
|---|---|---|---|
| Glass storefront entry | Narrow aluminum stile with a hook-bolt or deadlatch and a key cylinder; sometimes a panic bar | Electric strike designed for aluminum storefront frames, or an electrified panic device; mullion-style reader | Stiles and mullions are too narrow for a standard single-gang reader; you cannot run wire through glass |
| Rear steel man-door | Cylindrical lever lock or rim exit device in a hollow-metal frame | Fail-secure electric strike in the frame, or an electrified exit device where panic hardware is required | Frames set in tilt-wall are often grout-filled, so cable cannot be fished down the jamb |
| Interior office, IT or stock room | Keyed office lever on a wood or metal door | Electrified lever lock fed through a power-transfer hinge, or a strike in the frame | Fire-labeled doors and frames limit what can be cut or drilled |
| Overhead dock or roll-up door | Motor operator with a wall push-button | Reader wired to the operator’s open input, plus a heavy-duty door contact | The reader should command the operator — it should not try to lock the door itself |
| Shared corridor or demising door | Landlord-keyed hardware | Often the building’s system, not yours | Get written approval before touching base-building doors |
The storefront causes the most trouble. Aluminum storefront frames are thin-walled, so a strike built for a steel frame either won’t fit the profile or tears loose within a year, and the keeper must match the short throw of a storefront latch exactly. Where the front door is also a required exit, an electrified panic device is often cleaner: the bar still opens with one push from inside, and the controller releases the outside trim.
Locking the door without trapping anyone
One principle sits under every hardware choice: a locked door must still let people out from the inside in one motion, with no key, no card and no special knowledge. Access control governs who gets in, never who gets out. The building and fire codes adopted across the Houston region are built on that idea, and the local fire official decides how they apply to a given building.
Electric strikes: the default
With a strike the lock stays mechanical, so the inside lever or panic bar always retracts the latch. A fail-secure strike stays locked when power drops — right for an exterior door — while exit never depended on electricity in the first place.
Magnetic locks: allowed, with conditions
A maglock holds the door with an electromagnet and has no mechanical override. Codes therefore generally require a sensor on the egress side that releases it as someone approaches, a push-to-exit button beside the door that cuts lock power directly for a set time, release on power loss, and release on fire alarm where the building has one. We specify a maglock where a door genuinely can’t take a strike, not as a shortcut.
Fire-labeled doors
A fire door must latch positively during a fire, so any strike on it has to be a fire-rated, fail-secure model; a fail-safe strike that drops the latch on power loss defeats the door. Modifications beyond the listing can void the label, which is why labeled openings are flagged on our door schedule before quoting.
Fire alarm release
The fire alarm side of that connection belongs to the building’s licensed fire alarm contractor. We provide the input at the lock power supply, coordinate the tie-in, and test the release with them present.
Getting cable to the door in tilt-wall and metal buildings
Most of Stafford’s office-warehouse stock is concrete tilt-wall or pre-engineered metal, with a drop ceiling over the office end and open bar joists over the warehouse. Each surface changes the route.
- Tilt-wall panels are solid, so cable drops in surface raceway painted to match, or inside the frame when it is hollow; exterior penetrations are cored and sealed.
- Metal buildings let cable ride girts and purlins on J-hooks, dropping in conduit where forklifts work.
- Ceilings used as return-air plenums, common above office build-outs, call for plenum-rated cable.
Each door gets a shielded reader cable, a pair for the door contact, one for the exit device and a heavier pair for lock power — often bundled as one composite cable.
Wiegand or OSDP
Wiegand is the legacy reader protocol: one-way, unencrypted, six conductors, practical to roughly 500 feet. OSDP runs over RS-485 on four conductors, talks both ways, supervises the reader so removal is detected, supports encryption through Secure Channel, and reaches far longer distances. On new Stafford installs we specify OSDP-capable readers and controllers wherever the platform supports them.
Voltage drop at the lock
A 24-volt strike a few hundred feet from its supply on thin conductors can arrive too weak to release under load — it hums and holds. A heavier lock-power conductor or a supply placed nearer the doors solves it, and we measure voltage at each energized lock before signing it off.
How EVOTECH runs a Stafford keycard job
- Walkthrough and door schedule. Each opening gets a line — door and frame material, handing, existing hardware, fire label, reader position, cable route, lock type — and that schedule becomes the itemized quote.
- Landlord sign-off. Leases usually control exterior penetrations and base-building doors, so your property manager gets the schedule to approve before install day.
- Rough-in. Cable pulled, raceway and conduit set, penetrations sealed, head-end space prepared near a network switch and a dedicated outlet.
- Door hardware. Strikes and locks mounted, contacts recessed, exit sensors aimed, exterior readers sealed.
- Head-end. Controller, battery-backed lock power supply, network connection, fire alarm input where required.
- Programming. Users, groups and schedules — front door unlocked during posted hours and card-only after, warehouse limited to shipping staff, holidays preloaded.
- Testing. Valid, revoked and out-of-schedule cards; normal exit; held-open and forced alarms; power removal; alarm release; lock voltage.
- Handoff. Admin training plus the door schedule, panel location, wiring notes and the breaker that feeds the lock supply.
What moves the price on a keycard project
No honest flat price exists for keycard access, because openings differ so much. The quote is built from these variables:
- Number and type of openings — storefront glass, fire-labeled doors and electrified panic hardware take more specialized parts than a plain steel door.
- Cable path — coring concrete, raceway and warehouse conduit versus an easy stud wall.
- Credentials — encrypted smart cards and mobile keys cost more per user than legacy prox.
- Software model — cloud subscription or on-premises license.
- Reuse — some existing panic devices take an electrification kit; others must be replaced.
- Coordination and scheduling — fire alarm tie-ins, permits where required, landlord conditions, after-hours work.
Six installation mistakes that bring the truck back
- A strike that buzzes but won’t release — voltage drop, or weatherstripping and a strong closer preloading the latch beyond the strike’s rating.
- Held-open alarms every afternoon — a closer too weak to finish latching, or a contact magnet set too far from its switch.
- Forced-door alarms whenever staff leave — a missing or badly aimed exit sensor.
- Relays that fail months later — no suppression diode across a DC lock coil, so each release spikes the controller’s contacts.
- A reader dead after the first big storm — an unsealed cable entry on an exterior wall.
- A secure door opened by a copied card — legacy 125 kHz cards duplicate easily, so we recommend encrypted credentials on every new system.
All six are preventable at install time, and all six are on our test sheet.
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Frequently asked questions
We lease a flex suite in a Stafford business park. Can we add keycard access without the landlord?
Doors inside your leased space are often your decision under the lease, but exterior penetrations, storefront modifications and shared corridor doors normally need the landlord’s written approval. Check the alterations clause. We prepare a door schedule your property manager can approve before any work starts, which avoids a stop-work request halfway through the job.
What happens to our doors if the power goes out?
The lock power supply and controller run on standby batteries for a period that depends on battery size and how many locks they feed. Fail-secure strikes on exterior doors stay locked when power is finally lost, while the inside lever or panic bar still opens mechanically, so nobody is trapped. Maglocks release on power loss by design.
Can a keycard open our roll-up dock door?
Yes. The reader is wired to the door operator’s open input, so a valid card commands the motor the same way the wall button does, and a heavy-duty contact reports whether the door is open. We mount the reader where a forklift can’t clip it and protect it if the drive path is tight.
Do we need a server in the building?
Not necessarily. Cloud-hosted platforms keep the software online and you manage doors from a browser or phone; you still need the controller on site. On-premises systems run on a local PC or appliance. On most platforms the controller stores the user list locally, so doors keep working if the internet connection drops.
How do we handle an employee who leaves?
You disable the card in the software and it stops working at every door immediately — no rekeying. The audit log also shows when that card was last used, which is useful if anything is missing.
Map out your Stafford doors with EVOTECH
Book an on-site estimate and our technician walks every opening in your suite, then sends a door-by-door schedule of hardware, cable path and code notes, priced line by line. Call (832) 359-2425.
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