Drawing Types and Symbols

for use in floorplans and AV system designs

Match Lines

shows how each sub-drawing matches to another page of the drawing when a drawing doesn’t fit onto one page. Use match lines to line up several drawings to see whole plan.

Elevation Flag

used on plan drawings to indicate elevation drawings

center # is the page number where the elevation drawings can be found

letters in triangles indicate the elevation drawing on that page

you can “look around the room” as if you were standing on the elevation flag and viewing the walls.

Detail Flag
top line = drawing #
bottom line = sheet #

small items that need to be blown up to show how they’re installed

Section Cut Flag
top line = drawing #
bottom line = sheet #

Indicates which section drawing depicts a section of a master drawing in more detail.

Column Lines/Grid Lines

Used to indicate the locations of columns, load-bearing walls, and other structural elements within the building layout, prior to the room locations being defined.

Which type of drawing provides the best information about the ducts and piping in a facility?

mechanical drawing

Which type of drawing shows any item that appears on a specific wall, such as a window, light switches, or wall plate?

Elevation drawing

Which type of drawing shows perspective/view (top, front, side, back), location of bldg systems like HVAC, plumbing, lighting, electricity, structural?

Architectural drawing

Which type of drawing shows multiple views (top, bottom, front, back, left side, right side)?

used in manufacture and mechanical design to understand part dimensions

Orthographic drawings

Which type of drawing shows objects in 3D?

realistic view of mechanical parts

Isometric drawings

Which type of drawing shows a view of the interior of a building on the vertical plane?

shows internal features of object by cutting through

used for structural analysis

Sectional drawings

Which type of drawing illustrates how parts fit together?

expanded views to show individual components

Assembly drawings

Which type of drawings represent electrical, hydraulic, or pneumatic flow systems using symbols?

helps in troubleshooting and systems design

Schematic & Circuit drawings

Which type of drawing shows floorplan, aerial view of room?

Plan drawing

Drawings that have been modified by AV pro to reflect changes made on-site to original plans are called

Drawings of record

Two common scales used

1/4” = 1 foot

1:100

Area formula

Area (in square footage/meters) = length x width

Volume formula

Volume (in cubic footage/meters) = length x width x height