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Section 4 Construction Systems and Supplemental Drawings
has four sections:
A-A
through D-D. In this case,
sections
A-A
and
B-B
are full building sections,
section
C-C
is a wall section, and section
D-D
is a partial building section. Notice that an
identifying letter is included at each end of the
cutting-plane line. The actual section drawings
are labeled
SECTION
A-A,
SECTION
B-B, and so on.
Longitudinal and
Transverse Sections
A full section that runs across the longest
dimension of a building is known as a longitudinal
building section. Section
B-B
in Figure 21-7 is
a longitudinal section. A transverse building
section is perpendicular (90°) to the longitudinal
building section. It cuts across the width of the
building. Longitudinal and transverse sections
show different information; therefore, both are
often needed in a set of plans. Section A-A in
Figure 21-7 is a transverse section.
Specifying Building
Section Location
To read a building section correctly, you
need to know where on the building the section
was “taken”—where the section cuts through
the house. The location of each section in a set
of working drawings is typically shown on the
fl oor plan. Depending on the information to
be shown, some sections are identifi ed on the
foundation plan. A cutting-plane line is drawn
across the plan drawing to identify the location
and extent of the section. See Figure 21-7.
Identifying Sections
Most sets of plans contain more than one
building section. To identify the sections, the
fi rst section is labeled A-A, the second is labeled
B-B, and so on. The fl oor plan in Figure 21-7
Figure 21-3. An example of a partial building section.