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AF103.4 Basements or Enclosed Crawl Spaces With Concrete Floors or Other Floor Systems and Slab-On-Grade Dwellings
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A soil-gas-retarder shall be
placed on top of the gas-permeable layer prior to casting the slab or placing the floor assembly. The soil-gasretarder
shall cover the entire floor area with separate sections
lapped not less than 12 inches (305 mm). The soilgas-
retarder shall fit closely around any pipe, wire, or
other penetrations of the material. Punctures or tears in the
material shall be sealed or covered.
Before a slab is cast
or other floor system is installed, a "T" fitting shall be
inserted below the slab or other floor system and the soilgas-
retarder. The "T" fitting shall be connected to a vent
pipe. The vent pipe shall extend through the conditioned
space of the dwelling and terminate not less than 12 inches
(305 mm) above the roof in a location not less than 10 feet
(3048 mm) away from any window or other opening into
the conditioned spaces of the building that is less than 2
feet (610 mm) below the exhaust point.
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Section R506 Floors, Concrete Floors (On Ground)
Concrete slab-on-ground floors shall be
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2015 Michigan Residential Code > 5 Floors > R506 Concrete Floors (On Ground) > R506.2 Site Preparation
R403.4.2 Foundations, Concrete Footings
Concrete footings shall be
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FIGURE R403.4(2)
BASEMENT OR CRAWL SPACE ...
2015 Michigan Residential Code > 4 Foundations > R403 Footings > R403.4 Footings for Precast Concrete Foundations > R403.4.2 Concrete Footings