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Chapter 21 Building Sections
Partial Building Section
When part of a structure needs to be shown
in more detail, an enlarged view is used. A
partial building section cuts through half or more
of the structure, but not its entire length. It is
drawn at a larger scale—usually 3/8″ = 1′-0″
or larger—to show detailed information about
a specifi c part of the structure. Figure 21-3
shows a partial building section that details the
construction of a master bathroom.
Wall Section
A wall section cuts through only one wall,
typically an exterior wall. See Figure 21-4. It
shows the foundation system, wall system, and
roof system at one location in the structure.
Like partial building sections, wall sections
are shown at an enlarged scale to show greater
detail. Wall sections are typically drawn at
a scale of 3/4″ = 1′-0″ or larger. Wall sections
typically show more specifi c details than other
types of building sections.
Typical and Specifi c Sections
Each type of section can be further classifi ed
as either a typical section or a specifi c section. A
typical section is one that represents features
or sizes that are used in many different places
in the structure. Figure 21-1 is an example of a
typical building section. Notice that the word
TYPICAL
is included in many of the notes on
the drawing. Typical wall sections are also
important in constructing accurate elevations
and are included in most sets of construction
drawings. See Figure 21-5.
A specifi c section, on the other hand, shows
a feature, method, or technique that is used only
once, particularly if the information is not clear
in the fl oor plan. Figure 21-6 shows a specifi c
wall section for a box window over the sink in
a kitchen.
Figure 21-2. An example of a full building section that shows the positions and materials for the piers
and footings in a foundation.