News
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, by United Doors and Locks Regular Arm, Parallel Arm, Top Jamb: Mounting a Door Closer Three Ways
Regular arm is the most efficient, parallel arm is the most protected, top jamb is for doors that cannot carry a closer. How to pick,...
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, by United Doors and Locks Sizing a Door Closer: Power Sizes 1 to 6 and the 5 lb ADA Limit
Closer power size comes from door width. Then the ADA opening-force and closing-speed limits have to be met at the same time. How to do...
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, by United Doors and Locks Lock Functions Explained: Passage, Privacy, Entrance, Office, Storeroom, Classroom
Function is what the lock does, not how it is built. Passage, privacy, entrance, storeroom and classroom, with the ANSI numbers and where each belongs.
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, by United Doors and Locks US Finish Codes Decoded: US26D, US32D, US10B and the Rest
US26D, 626, satin chrome: three names for one finish. A translation table for the US and BHMA finish codes you have to pick before you...
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, by United Doors and Locks Backset Explained: Why 2-3/8" and 2-3/4" Are Not Interchangeable
Backset is the distance from the door edge to the centre of the bore. Get it wrong and the latch will not reach the strike....
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, by United Doors and Locks Cylindrical vs Mortise Locks: Which Commercial Lock Is Right?
A cylindrical lock is carried between two roses; a mortise lock sits in a pocket in the door edge. How that changes cost, durability, functions...
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, by United Doors and Locks Continuous Hinges vs Butt Hinges
Butt hinges carry a door at three points; continuous hinges carry it along the whole edge. Which openings justify the cost difference.
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, by United Doors and Locks Ball Bearing vs Plain Bearing Hinges
The rule that settles most cases: if the door has a closer, it needs ball bearing hinges. Here is why, with the cycle counts behind...
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, by United Doors and Locks How Many Hinges Does a Commercial Door Need?
Hinge count comes from door height, and hinge size and weight come from door width and mass. The standard schedule, plus when to go heavier.
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, by United Doors and Locks Reverse Bevel Doors Explained
Reverse bevel means the door swings toward you from the secure side. Here is how to identify it and the four hardware decisions it changes.
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, by United Doors and Locks Grade 1 vs Grade 2 Commercial Door Hardware: What the Cycle Counts Actually Buy You
ANSI/BHMA grades are cycle-test results, not marketing tiers. Here is what Grade 1, 2 and 3 mean in years of service, and where each belongs.
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, by United Doors and Locks How to Determine Commercial Door Handing
Handing is decided from the outside of the door, and getting it wrong means returning parts. LH, RH, LHR and RHR, explained with the checks...
