Why are doors numbered on a working drawing floor plan ? – Hobbies & Collectibles


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Doors are numbered on a working drawing floor plan for 3 reasons:

1. To associate a door with a particular room – the door number
should match room number with an alphanumeric number. For example,
“Family Room” (Office, etc.) is numbered 101 and has two doors, so
one door will be 101-A and the second door 101-B and so forth if
there are more doors for a particular room.

2. To identify the door on the “Door Schedule” which will give you
the particulars of the door. Door Schedules not only identify the
door number with the room number and name, but also list the door
type (single door or double door), door width, door height, its
thickness, door material, finish, the door frame type, door frame
material, finish, fire rating (if required based on fire rating of
wall where door is framed into – based on building code), fire
rating label, hardware set and references to door details.

3. All doors in a building aren’t necessarily the same and will
also have different hardware functions for different room usage.

The bottom line is that doors are numbered on a working drawing
floor plan for coordination, so that the proper door type and
hardware are used for the building occupancy type and associated

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