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Construction Symbols Library

Comprehensive reference for architectural, structural, and MEP drawing symbols used in construction documentation

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ARCH Architectural Symbols

Single Swing Door

Standard hinged door showing swing direction

DR-01

Double Swing Door

Pair of hinged doors opening in same direction

DR-02

Sliding/Pocket Door

Door slides into wall cavity

DR-03

Bi-Fold Door

Folding door panels, typically for wardrobes

DR-04

Fixed Window

Non-operable window panel

WN-01

Casement/Awning Window

Hinged window showing swing direction

WN-02

Sliding Window

Horizontal sliding window sashes

WN-03

Masonry Wall

Solid brick or block construction

WL-01

Stud/Frame Wall

Timber or steel stud partition

WL-02

Cavity Wall

Double-skin wall with insulation

WL-03
UP

Staircase (Up)

Stairs with arrow indicating up direction

ST-01
DN

Staircase (Down)

Stairs with arrow indicating down direction

ST-02
N

North Point

Indicates true north orientation

NP-01
A A

Section Cut Line

Indicates section cut location and direction

SC-01
RL

Level/Datum Point

Indicates reduced level or elevation

LV-01
1

Grid Line

Structural grid reference line

GR-01

STRUCT Structural Symbols

Concrete Column

Reinforced concrete column (plan view)

COL-01

Steel Column (UC)

Universal column section (plan view)

COL-02

Circular Column

Round concrete or steel column

COL-03

Concrete Beam

Reinforced concrete beam (section)

BM-01

Steel Beam (UB)

Universal beam section

BM-02

Hidden Beam

Beam above or below current level

BM-03

Pad Footing

Isolated column footing

FT-01

Strip Footing

Continuous wall footing

FT-02

Rebar (Section)

Steel reinforcement bar cross-section

RB-01

Welded Wire Mesh

Steel reinforcement mesh for slabs

RB-02

Concrete Slab

Reinforced concrete floor slab

SL-01

Steel Angle

L-shaped steel section

SS-01

Steel Channel (PFC)

C-shaped parallel flange channel

SS-02

RHS/SHS

Rectangular/Square hollow section

SS-03

CHS

Circular hollow section

SS-04

MECH Mechanical Symbols

Rectangular Duct

HVAC supply/return ductwork

DT-01

Round Duct

Circular/spiral ductwork

DT-02

Supply Diffuser

Ceiling air supply diffuser

DF-01

Return/Exhaust Grille

Air return or exhaust grille

GR-01

Exhaust Fan

Mechanical exhaust/extract fan

FN-01

Volume Control Damper

Manual or motorized damper

DM-01

Fan Coil Unit

FCU terminal unit

FC-01
AHU

Air Handling Unit

Central air handling plant

AH-01

Pendant Sprinkler

Fire sprinkler head (pendant type)

SP-01

Upright Sprinkler

Fire sprinkler head (upright type)

SP-02

Fire Extinguisher

Portable fire extinguisher location

FE-01

Fire Hose Reel

Fire hose reel cabinet

FH-01

ELEC Electrical Symbols

Single Power Outlet

General purpose outlet (GPO)

PO-01

Double Power Outlet

Twin general purpose outlet

PO-02

Floor Outlet

Floor-mounted service outlet

PO-03

Single Switch

Single pole light switch

SW-01

Double Switch

Two gang light switch

SW-02
D

Dimmer Switch

Light dimmer control

SW-03

Ceiling Light

Surface or recessed ceiling light

LT-01

Downlight

Recessed LED downlight

LT-02

Linear/Batten Light

Fluorescent or LED batten

LT-03

Wall Light

Wall-mounted sconce or bracket

LT-04
EXIT

Exit Sign

Emergency exit light/sign

EM-01
DB

Distribution Board

Electrical distribution panel

DB-01
D

Data Outlet

RJ45 network data point

DA-01
T

Telephone Outlet

Voice/telephone point

TE-01
TV

TV Outlet

Television antenna point

TV-01

PLMB Plumbing Symbols

Wash Basin

Hand wash basin/vanity

WB-01

Toilet (WC)

Water closet/toilet pan

WC-01

Urinal

Wall-mounted urinal

UR-01

Bathtub

Standard bath tub

BT-01

Shower

Shower tray/recess

SH-01

Kitchen Sink (Single)

Single bowl kitchen sink

KS-01

Kitchen Sink (Double)

Double bowl kitchen sink

KS-02

Floor Waste

Floor drain/gully

FW-01
CO

Cleanout

Drainage inspection/access point

CO-01

Gate Valve

Isolation/stop valve

GV-01
HW

Hot Water Unit

Storage water heater

HW-01
GT

Grease Trap

Grease interceptor

GT-01

Pump

Sump/ejector pump

PM-01
G

Gas Point

Gas outlet/connection

GP-01
GM

Gas Meter

Gas supply meter

GM-01