Page 120 - 2018_IRC

FOUNDATIONS

BOTTOM (SOLE) PLATE
ATTACHMENT PER 3½" MIN CONCRETE
SECTION R403.1.6 SLAB PER SECTION R506.1 BEARING WALL
MIN CLEARANCE WALL LINE
PER SECTIONS
R404.1.6 AND 3½" MIN CONCRETE SLAB
R317.1 TYP PER SECTION R506.1
12″ MIN DEPTH
OR GREATER FOR
FROST PROTECTION
PER SECTIONS
R403.1.4 AND
R403.1.4.1 TYP W
W

MONOLITHIC SLAB-ON-GROUND THICKENED SLAB-ON-GROUND FOOTING
1 WITH TURNED-DOWN FOOTING 2 AT BEARING WALLS OR BRACED WALL LINES
SCALE: NOT TO SCALE
SCALE: NOT TO SCALE
3½" MIN CONCRETE SLAB
PER SECTION R506.1
MIN CLEARANCE INTERIOR
PER SECTIONS
R404.1.6 AND
R317.1 TYP
CMU STEM WALL
CMU STEM WALL
12″ MIN DEPTH PER P P P P
SECTION R403.1.4
OR GREATER FOR
FROST PROTECTION T T
PER SECTION
R403.1.4.1 TYP
W W

SLAB-ON-GROUND WITH BASEMENT OR CRAWL SPACE WITH
3 MASONRY STEM WALL AND SPREAD FOOTING 4 MASONRY WALL AND SPREAD FOOTING
SCALE: NOT TO SCALE SCALE: NOT TO SCALE
CONCRETE STEM
WALL THICKNESS
PER SECTION R404.1.3
INTERIOR INTERIOR

CONCRETE STEM WALL
P P CONCRETE STEM AND
FOOTING COMBINED
(MONOLITHIC POUR)
CONCRETE FOOTING PLACED T
PRIOR TO STEM
W W

BASEMENT OR CRAWL SPACE WITH BASEMENT OR CRAWL SPACE WITH
CONCRETE WALL AND SPREAD FOOTING FOUNDATION WALL BEARING DIRECTLY ON SOIL
5 6
SCALE: NOT TO SCALE SCALE: NOT TO SCALE
For SI: 1 inch = 25.4 mm.
W = Width of footing, T = Thickness of footing and P = Projection per Section R403.1.1
NOTES:
a. See Section R404.3 for sill requirements.
b. See Section R403.1.6 for sill attachment.
c. See Section R506.2.3 for vapor barrier requirements.
d. See Section R403.1 for base.
e. See Figure R403.1.3 for additional footing requirements for structures in SDC D , D and D and townhouses in SDC C.
1
2
0
f. See Section R408 for under-floor ventilation and access requirements.

FIGURE R403.1(1)
PLAIN CONCRETE FOOTINGS WITH MASONRY AND CONCRETE STEM WALLS IN SDC A, B AND C a, b, c, d, e, f

2018 INTERNATIONAL RESIDENTIAL CODE ® 95
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