# Plan Symbols & Abbreviations: A Beginner's Key
Drawings use a **shorthand** of symbols and abbreviations so a lot of information fits on one sheet. Here are the ones you'll see constantly.
## Common symbols
- **Door** — a line with an arc (the swing).
- **Window** — a break or thin lines in the wall.
- **Electrical outlet** — a small circle with lines; **switch** — an "S".
- **Light fixture** — a circle or special symbol.
- **Plumbing fixtures** — recognizable shapes for toilet, sink, tub, shower.
- **North arrow** — orients the plan.
- **Section cut** — a line with an arrow and a **bubble** (tells you a cut-through view exists).
- **Detail callout** — a **circle with numbers** pointing to a zoomed-in detail (top number = detail #, bottom = sheet #).
## Common abbreviations
- **TYP** = typical · **O.C.** = on center · **EQ** = equal spacing
- **DIM** = dimension · **CL** = centerline · **NTS** = not to scale
- **FF / FFE** = finished floor (elevation) · **MIN / MAX** = minimum / maximum
- **CONC** = concrete · **GWB** = gypsum board (drywall) · **DIA / R** = diameter / radius
Most sets include a **legend** or **abbreviations list** — check it when you're unsure.
**Takeaway:** Learn the common symbols and abbreviations — they're the shorthand language of every drawing set, and there's a legend when you're stuck.
> *Educational overview — practice with a real plan set. The more drawings you read, the faster it clicks.*
