In general poured concrete basement walls that are 8 feet tall or less and have no more than 7 feet of soil pressing against them from the outside function well at a thickness of 8 inches.
Nominal thickness irc concrete walls.
A specified minimum actual wall thickness.
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.
If the soil class is gp what is the minimum vertical reinforcement required.
Concrete masonry is used to construct various foundation wall types including full basement walls crawlspace walls stem walls and piers.
Concrete masonry is well suited for below grade applications because of its strength durability economy and resistance to fire insects and noise.
7 5 9 5 and 11 5 in.
Since its first date of publication the prescriptive minimum wall thickness has been prescribed in terms of an actual minimum.
1 inch 25 4 mm 1 plf 14 6 n m 1 pound per square foot 47 9 n m 2.
The use of this table shall be prohibited for soil classifications not shown.
An 8 foot high flat concrete foundation wall of nominal 10 inch thickness is subjected to 6 feet of unbalanced backfill.
See table r608 3 for tolerance from nominal thickness permitted for flat walls.
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.
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.
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.
C 6 at 43 o c.
B 5 at 47 o c.
D no vertical reinforcement required.
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.