Page 220 - Masonry and Concrete

Footings, Foundation Walls, Basements, and Slabs
219
FOOTINGS, FOUNDATION WALLS, BASEMENTS, AND SLABS

are at or below the level of the groundwater. Water vapor diffuses
through soil because of vapor pressure differentials between areas of
higher and lower temperatures. To prevent moisture problems, both
water and water vapor movement must be considered in the design of
basements and slabs-on-grade.

MASONRY STUD
VENEER FRAME

5"
MIN.

2 3 /4"

FINISHED SLAB EDGE
OUTRIGGER 2 4 RIPPED
TO 2 3 /4"

PLYWOOD
FORM
EARTH
OR
FILL

FORMWORK
FIGURE 6-29
Recessed masonry ledge.

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