Architectural Drawings - Carpenter's and Builder's Math, Plans, and Specifications - page 258

The shape of the object is such that the entire visible surface does
not lie in a plane parallel to the projection plane. The points A and
E , though located at the other end of the object, are visible and
accordingly form part of the right-end view. Figure aefb does not
show the top in its true size because it is projected obliquely instead
of at 90 ◦ .An oblique projection makes an object appear smaller
than its real size.

Left-End View (Elevation)
With a pane of glass shifted to the left side of the object (see Figure
9-4), and the building viewed directly from the left side (as position
S ), the rays of light from corners ADHE of the left side pass through

P

e

E H

a

F

f

S

A

H

h

B
C

b

FRONT

LEFT END
ELEVATION

d

D

LEFT END

Figure 9-4 Projection of the left end of an object illustrating
left profile plane.

the glass at points adhe .Iflines connecting these points are drawn
on the glass, a left side view of the object is obtained. However,
the edge FB at the other end is invisible. It is shown by a dotted line
connecting f and b projected from F and B . The completed drawing
is then called a left-side view ,orpreferably a left-end elevation .
Sections
Most buildings are so complex they cannot be clearly represented
by a plan and elevation alone. In such a case, the parts that do
not appear properly in these drawings are better represented by a
section ,or sectional views .Across-section is a drawing of a building
showing that part cut by a plane (see Figure 9-5).