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  • United Doors and Locks guide: Hollow metal vs wood vs FRP

    , 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.

  • United Doors and Locks guide: Continuous vs butt hinges

    , 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.

  • United Doors and Locks guide: How many hinges does a door need

    , 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.

  • United Doors and Locks guide: How to determine door handing

    , 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...

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