Page 350 - Masonry and Concrete

Retaining Walls
349
RETAINING WALLS

shorter, but they must overlap and be tied to separate reinforcing bars
in the wall. The reinforcing dowels should be in the center of the wall.
For a concrete block wall, the dowel spacing must be accurate enough
to fit into the cores of the block. Minimum concrete strength should be
2,500 psi.

10.2.2 Dimensions and Reinforcement
For the cantilever wall designs given in this chapter, no surcharge load
is permitted. That is, no automobile or equipment traffic should occur
on the top side of the wall, and the soil slope at the top of the wall
should be zero. In situations where surcharge loading is expected or
cannot be avoided (e.g., next to a street or driveway, or where the slope
of the retained soil is greater than zero), an engineer should be hired to
design the wall for this additional loading. Walls that are taller than

NUMBERS INDICATE FROST DEPTH IN INCHES
FIGURE 10-5
Average annual frost depth for continental United States. (from Architectural Graphic Standards, 9th ed).

Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright © 2004 The McGraw-Hill Companies. All rights reserved.
Any use is subject to the Terms of Use as given at the website.