Page 261 - Masonry and Concrete

Masonry Veneer

260 CHAPTER SEVEN

LOAD

DOTTED AREA INSIDE
CORBELED ARCH IS
DEAD LOAD TO BE
CARRIED BY LINTEL

NATURAL ARCHING ACTION IN 1 /2 RUNNING
BOND PATTERN TRANSFERS MOST VERTICAL
LOAD TO EITHER SIDE OF OPENING
FIGURE 7-10

Corbeled arch created by arching action in running bond pattern. (from Christine Beall,
“Lintel Design and Detailing,” The Magazine of Masonry Construction, March 1993).

and cast stone lintels are also used to span openings in masonry veneer
walls. Span length for any type of lintel will depend on the strength of
the member. In steel lintels, increasing size and thickness provide
greater strength. In concrete and masonry lintels, reinforcing steel
increases strength and span capabilities. CABO requirements provide
that lintels in masonry veneer walls may have maximum spans as pro-
vided in Figure 7-14.
Arches may be constructed in various forms such as segmental,
elliptical, Tudor, Gothic, semicircular, parabolic, flat or jack arches
(Figure 7-15). The semicircular and segmental are perhaps the most
popular and widely used arch forms in contemporary design and con-
struction. The primary structural advantage of an arch is that under
uniform loading conditions, the stress is principally compression
rather than tension. This is very efficient structurally since masonry’s

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