Figure 2-16.A typical section of a masonry building.
information that cannot be given on elevation or plan
views. Sections are classified as typical and specific.
Typical sections represent the average condition
throughout a structure and are used when construction
features are repeated many times. Figure 2-16 shows
typical wall section A-A of the foundation plan in
figure 2-10. You can see that it gives a great deal of
information necessary for those constructing the
building, Lets look at these a little more closely.
The foundation plan shown in figure 2-10
specifies that the main foundation of this structure
will consist of a 22- by 28-foot concrete block
rectangle. Figure 2-16, which is section A-A of the
foundation plan, shows that the front and rear portions
of the foundation (28-foot measurements) are made of
12-by-8-by-16-inch CMUs centered on a
10-by-24-inch concrete footing to an unspecified
height. These are followed by 8-inch CMUs, which
form a 4-inch ledger for floor joist support on top of
the 12-inch units. In this arrangement, the 8-inch
CMUs serve to form a 4-inch support for the brick.
The main wall is then laid with standard
2 l/2-by-4-by-8-inch face brick backed by
4-by-8-by- 16-inch CMUs.
Section B-B (figure 2-17) of the foundation plan
shows that both side walls (22-foot measurements)
are 8 inches thick centered on a 24-inch concrete
footing to an unspecified height. It also illustrates the
pilaster, a specific section of the wall to be
constructed for support of the girder. It shows that
the pilaster is constructed of 12-by-8-by-16-inch
CMUs alternated with 4-by-8-by-16-inch and
8-by-8-by- 16-inch CMUs. The hidden lines (dashed
Figure 2-17.A specific section of a concrete masonry wall.