Page 318 - Masonry and Concrete

Masonry Garden Walls

317
MASONRY GARDEN WALLS

WIDER FOOTING
AT PILASTERS
16"

32"

36"

8"

FIGURE 9-2
A wider footing is required at pilasters.

Nominal Wall Thickness (t), Maximum Distance Between
Inches Piers or Pilasters (18 t), feet

4 6
6 9
8 12
12 18

FIGURE 9-3

Recommended pilaster spacing for masonry screen walls and garden walls.

Supporting piers or pilasters are used to provide additional lateral
stability for freestanding masonry walls. The usual limitation is the
same as the height-to-thickness ratio, or 18 times the thickness of the
wall (Figure 9-3). This means that an 8-in.-thick wall would require
pilasters every 12 ft. Pilasters are basically just thicker wall sections
which add stiffness. They can be used as decorative features even
when they’re not needed for extra strength because they give the wall
a different look. Small pilasters can be built to project on only one side

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