News
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, by United Doors and Locks What Is Missing From Your Door Schedule: The 12 Things We Check Before Quoting
Door schedules are rarely wrong, usually incomplete. The 12-item checklist we run every schedule against, and why each omission fails in a different way.
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, by United Doors and Locks Access Control and the Fire Alarm: Getting the Sequence of Operations Right
Electrified openings fail inspection because nobody wrote down what the door does when the alarm sounds. The sequence of operations, and the five checks that...
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, by United Doors and Locks What We Need to Key Your Job
Keying is the last decision made on a project and the first thing to hold up handover. The five inputs we need to build your...
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, by United Doors and Locks Hardware Schedules and Submittals: How a Division 8 Package Works
Hardware sets, door numbering, the submittal review cycle and keying meetings — how a Division 8 package actually moves from specification to the jobsite.
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, by United Doors and Locks Hollow Metal vs Wood vs FRP: Choosing a Commercial Door
Steel gauge, core construction, moisture and fire rating — how to pick the right door material for what the opening actually has to survive.
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, by United Doors and Locks How to Measure a Door and Frame for Replacement
Nominal size, rough opening, jamb depth and handing — the five measurements that let us quote a replacement door and frame without a site visit.
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, by United Doors and Locks Overhead Stops, Floor Stops, Wall Stops: Stopping a Door Without Wrecking It
A closer controls how a door shuts, not how far it opens. Overhead, floor, wall stops and closer stop arms, and which openings justify which.
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, by United Doors and Locks IC Cores and Keyways: What "IC Available" Means on a Spec Sheet
An interchangeable core swaps out in thirty seconds with a control key. What SFIC and LFIC mean, why locks ship without cores, and why the...
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, by United Doors and Locks Standalone Keypad, Smart Lock, or Networked Access Control?
Four tiers of access control, an order of magnitude apart in cost. The deciding factor is rarely the door: it is how often your people...
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, by United Doors and Locks Fire Door Assemblies: What the Label Lets You Change, and What Voids It
The label certifies the whole assembly, not the door leaf. What NFPA 80 lets you change in the field, what voids the rating, and the...
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, by United Doors and Locks NRP Hinges: The Cheap Upgrade That Stops a Door Being Lifted Off
On an outswing door the hinge pins face the street, and a door can be lifted out with the lock still thrown. Non-removable pin hinges...
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, by United Doors and Locks Rim, Surface Vertical Rod, Concealed Vertical Rod: Choosing an Exit Device
Rim, surface vertical rod, concealed vertical rod or mortise. The door configuration decides, and a removable mullion is often the cheapest answer to a pair.
