Commercial locks, master keys, and exit hardware

What the job involves

Commercial Locksmith in Lawrence, MA

Keyed-alike systems, exit device compliance, and lock changes scheduled around your business hours.

Master key systems, planned properly

A master key system lets one key open every door while each individual key opens only its own. Done well, it is invisible to the people using it. Done badly, it produces keys that unexpectedly open doors they should not, which is worse than having no system at all.

The planning is the work. Before any cylinder is pinned, the building needs a chart: which doors exist, who needs access to what, and how the hierarchy is structured. A small office might need two levels — a master and individual offices. A mixed-use building on Essex Street might need a grand master, floor masters, and unit keys underneath.

The other half of planning is expansion. A system pinned to exactly the doors that exist today has no room for the door added next year. Leaving unused combinations available at the design stage costs nothing; retrofitting them later means repinning the building.

Exit devices and the code side of the job

Commercial doors carry legal requirements residential doors do not. Egress has to work without a key, without special knowledge, and in a single motion — which is why panic bars exist and why chaining a fire door shut is not an option regardless of the theft problem it solves.

Panic hardware and fire-rated doors are inspected, and the common failures are avoidable: a device with a worn dogging mechanism that no longer latches, a door propped because the closer is too aggressive, or an added deadbolt above a panic bar that defeats the single-motion requirement entirely.

Where security genuinely conflicts with egress, the answer is usually a delayed-egress device or an alarmed exit rather than an added lock. Both keep the door legal while making unauthorized use obvious.

Working around your hours

Most commercial lock work does not need to happen during business hours, and doing it then costs the business more in disruption than the work costs. Rekeys, hardware swaps, and system installs are scheduled early, late, or at weekends by default.

Where a business has staff turnover, the practical arrangement is a standing rekey rather than a call-out each time someone leaves. Cylinders are rotated on a schedule, and departing keys stop working without an emergency visit.

For properties with multiple tenants, it is worth establishing up front who authorizes work on which doors. A locksmith who will rekey a unit for whoever is standing in front of it is a liability to every other tenant in the building.