Table r403 1 3 minimum width and thickness for concrete footings with cast in place concrete or fully grouted masonry wall construction inches a b for si.
Nominal thickness irc concrete walls.
See table r608 3 for tolerance from nominal thickness permitted for flat walls.
Since its first date of publication the prescriptive minimum wall thickness has been prescribed in terms of an actual minimum.
An 8 foot high flat concrete foundation wall of nominal 10 inch thickness is subjected to 6 feet of unbalanced backfill.
Masonry foundation walls shall be not bless than the thickness of the wall supported except that masonry foundation walls of at least 8 inch 203 mm nominal thickness shall be permitted under brick veneered frame walls and under 10 inch wide 254 mm cavity walls where the total height of the wall supported including gables is not more than 20 feet 6096 mm provided the requirements of section r404 1 1 are met.
7 5 9 5 and 11 5 in.
The use of this table shall be prohibited for soil classifications not shown.
A plain concrete wall with a minimum nominal thickness of 12 inches is permitted provided minimum specified compressive strength of concrete f c is 3 500 psi.
1 inch 25 4 mm 1 plf 14 6 n m 1 pound per square foot 47 9 n m 2.
Where the unbalanced backfill retained by the stem wall is greater than 18 inches 457 mm the minimum nominal thickness of the wall shall be 6 inches 152 mm.
Concrete masonry is well suited for below grade applications because of its strength durability economy and resistance to fire insects and noise.
B 5 at 47 o c.
R404 1 3 2 2 concrete foundation stem walls supporting light frame above grade walls.
A 4 at 38 o c.
When a taller wall or a higher level of soil or both come into play the thickness should increase to 10 inches.
Minimum vertical reinforcement for 8 10 and 12 inch nominal flat basement walls using 3 gatorbar bfrp basalt fiber reinforced polymer bars applies in seismic categories a b and c only minimum vertical reinforcement for 8 10 and 12 inch nominal flat basement walls.
Concrete strength al ൯ne for an 10 thick wall with 5 10 and 2 5 clear to strength steel will only reduce the nominal moment capacity of the secti對on from 136 68 to 135 66 inch kips 尩 if the concrete strength decreased from 3 5 to 3 0 ksi.
If the soil class is gp what is the minimum vertical reinforcement required.
C 6 at 43 o c.
D no vertical reinforcement required.
