Building Drawing: Plans, Elevations and Sections — CSEC Technical Drawing

Building drawings communicate the design and construction of a building using plans, elevations and sections drawn to scale.

Types of building drawing

Site (block) plan — shows the position of the building on the plot within the boundaries, with a north point for orientation. Drawn at a small scale (e.g. 1:500).
Floor plan — effectively a horizontal section viewed from above, showing the layout, sizes and uses of the rooms (e.g. 1:50 or 1:100).
Elevation — a view of an external face (front, rear or side) of the building.
Section — a vertical cut showing the internal construction and heights of the parts.

Walls are shown as two lines (the thickness), often hatched/poché to indicate the material.
Doors are shown as a gap in the wall with an arc showing the swing direction.
Windows are shown by lines within the wall thickness representing the frame and glass.
A north point shows orientation; dimensions are given in mm or m.
Schedules tabulate items such as doors, windows and finishes.

Building drawings use reduction scales such as 1:5 (details), 1:50 (sections), 1:100 (plans) and 1:500 (site plans).

Match each drawing to what it shows: plan (layout from above), elevation (external face), section (internal construction/heights), site plan (position on the plot).
Doors → gap + swing arc; walls → two lines, hatched.
A north point shows orientation.
Building scales are reductions (e.g. 1:50, 1:100).