Double door
Two doors in one opening, one hinged at each side. The arcs show the way each door swings.
Easily confused with
How to read it
A door symbol has the shape of the door and shows how it moves in plan, according to the Army's print-reading manual (TM 5-704), so a pair of doors is drawn as two leaves with a swing arc each. The Navy's Builder Basic course shows double doors drawn opening in and opening out: the side of the wall the arcs fall on is the side the doors open toward.
Also searched as: French door symbol, pair of doors.
This explains what a symbol represents on a drawing. Conventions vary between firms and standards, and a drawing's own legend takes precedence.
Look-alikes
A single door has one leaf and one arc. A casement window swings the same way but sits in a window opening.
Differences between drafters
The arcs are drawn to different angles. The Navy's Engineering Aid course notes that some drafters draw a full 90-degree swing rather than a 30-degree one, because it shows whether the open door will reach any equipment or wall. The same course observes that exterior doors of houses generally swing inward, while building or fire codes often require doors of commercial buildings to swing outward.
Read next
- Next in Blueprint symbolsSliding doorA door that opens by sliding along a track. The panels are drawn overlapping in the opening, with no swing arc.
- The same shape in Accessibility symbolsAssistive listening symbol (ear)An ear with a diagonal bar across it is the International Symbol of Access for Hearing Loss. It marks an assistive listening system: a loop, infrared or FM system that sends sound to hearing aids or headsets.
More blueprint symbols
The same shape elsewhere
Browse symbols drawn with curves and waves or lines.
Sources
- Construction Print Reading in the Field, TM 5-704 / AFM 85-27, Departments of the Army and the Air Force, para. 2-2a; app. B, fig. B-1
- Builder Basic, NAVEDTRA 14043A, Naval Education and Training Command, U.S. Navy, ch. 3, fig. 3-19
- Engineering Aid 3 (NAVEDTRA 14069), Nonresident training course, April 1995, Naval Education and Training Command (copy hosted by Navy Tribe), Ch. 10, drawing a floor plan
Researched, edited and approved by Rory Hansen before publishing. Last reviewed September 24, 2026. How we research
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