Page 216 - Masonry and Concrete

Footings, Foundation Walls, Basements, and Slabs
215
FOOTINGS, FOUNDATION WALLS, BASEMENTS, AND SLABS

joint reinforcement also controls shrinkage cracking in concrete
masonry walls and can be used when codes do not require the wall to
be structurally reinforced. Controlling shrinkage cracking in basement
walls is important in maintaining the integrity of waterproofing mate-
rials applied to the wall and preventing water penetration through the
cracks.

6.3.5 Basement Slabs
Basement floor slabs are usually supported on a gravel drainage bed
with the edges resting on the perimeter footing (Figure 6-27). The
CABO One and Two Family Dwelling Code requires only that the min-
1
imum slab thickness be 3- 2 in. and the concrete strength a minimum
of 2,500 psi. The Code does not include any requirements for reinforc-

3 /4" OR 1"
PLYWOOD FORM

2 4
BRACES

DOUBLE
2 4
WALES
WEDGE

STEM

1 /4" SNAP TIE

FIGURE 6-24
Snap ties for concrete forms. (from Portland Cement Association, The Homeowner’s
Guide to Building with Concrete, Brick and Stone, PCA, Skokie, Illinois).

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