BUILDING SECTIONS
A building section represents a vertical section of a
building. After a vertical plane slices through the
construction, we remove one of the parts. The
building section is an orthographic projection of the
portion that remains. cast onto a vertical picture
plane parallel or coincident with the cutting plane.
• Buildingsections revea l the shape and vertical
scale of interior spaces. the impact of window and
door openings ont hese spaces. and the vertical
connections between the internal spaces as well
as between inside and out side.
• Beyond the plane of the cut, we see elevations of
i nterior walls. as well as objects and events that
occur in front of them but behind the vertical plane
of the section cut.
• The conventional symbol for indicating the location
of the section cut in a plan drawing is a broken line
of long segments separated by short dashes or
dots.
• It is not necessary to draw this section line across
anentire floor plan, but it should at least overlap
t he exterior boundaries of the building.
• An arrow at the end of each line points inthe
direction of view.
Digital Sections
3D-modeling programs utilize "front and back" or
"hither and yon" clipping planes to create section
drawings.
56/ ARCHITECTURAL GRAPHICS