1807.1 - Foundation walls
Foundation walls shall be designed and constructed in accordance with Sections 1807.1.1 through 1807.1.6. Foundation walls shall be supported by foundations designed in accordance with Section 1808.
Exception: Concrete and masonry foundation walls shall be permitted to be designed and constructed in accordance with Section 1807.1.6.
TABLE 1807.1.6.2 CONCRETE FOUNDATION WALLSb, c
MAXIMUM WALL HEIGHT (feet) | MAXIMUM UNBALANCED BACKFILL HEIGHTe (feet) | MINIMUM VERTICAL REINFORCEMENT-BAR SIZE AND SPACING (inches) | ||||||||
Design lateral soil loada(psf per foot of depth) | ||||||||||
30d | 45d | 60 | ||||||||
Minimum wall thickness (inches) | ||||||||||
7.5 | 9.5 | 11.5 | 7.5 | 9.5 | 11.5 | 7.5 | 9.5 | 11.5 | ||
5 | 4 5 |
PC PC |
PC PC |
PC PC |
PC PC |
PC PC |
PC PC |
PC PC |
PC PC |
PC PC |
6 | 4 5 6 |
PC PC PC |
PC PC PC |
PC PC PC |
PC PC PC |
PC PC PC |
PC PC PC |
PC PC PC |
PC PC PC |
PC PC PC |
7 | 4 5 6 7 |
PC PC PC PC |
PC PC PC PC |
PC PC PC PC |
PC PC PC #5 at 46 |
PC PC PC PC |
PC PC PC PC |
PC PC #5 at 48 #6 at 48 |
PC PC PC PC |
PC PC PC PC |
8 | 4 5 6 7 8 |
PC PC PC PC #5 at 47 |
PC PC PC PC PC |
PC PC PC PC PC |
PC PC PC #5 at 41 #6 at 43 |
PC PC PC PC PC |
PC PC PC PC PC |
PC PC #5 at 43 #6 at 43 #6 at 32 |
PC PC PC PC #6 at 44 |
PC PC PC PC PC |
9 | 4 5 6 7 8 9d |
PC PC PC PC #5 at 41 #6 at 46 |
PC PC PC PC PC PC |
PC PC PC PC PC PC |
PC PC PC #5 at 37 #6 at 38 #7 at 41 |
PC PC PC PC #5 at 37 #6 at 41 |
PC PC PC PC PC PC |
PC PC #5 at 39 #6 at 38 #7 at 39 #7 at 31 |
PC PC PC #5 at 37 #6 at 39 #7 at 41 |
PC PC PC PC #4 at 48 #6 at 39 |
10 | 4 5 6 7 8 9d 10d |
PC PC PC PC #5 at 38 #6 at 41 #7 at 45 |
PC PC PC PC PC #4 at 48 #6 at 45 |
PC PC PC PC PC PC PC |
PC PC PC #6 at 48 #7 at 47 #7 at 37 #7 at 31 |
PC PC PC PC #6 at 47 #7 at 48 #7 at 40 |
PC PC PC PC PC #4 at 48 #6 at 38 |
PC PC #5 at 37 #6 at 35 #7 at 35 #6 at 22 #6 at 22 |
PC PC PC #6 at 48 #7 at 47 #7 at 37 #7 at 30 |
PC PC PC PC #6 at 45 #7 at 47 #7 at 38 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound
per square foot per foot = 0.157 kPa/m. a. For design lateral soil loads, see Section 1610. b. Provisions for this table are based on design and construction requirements specified in Section 1807.1.6.2. c. "PC" means plain concrete. d. Where unbalanced backfill height exceeds 8 feet and design lateral soil loads from Table 1610.1 are used, the requirements for 30 and 45 psf per foot of depth are not applicable (see Section 1610). e. For height of unbalanced backfill, see Section 1807.1.2. |
TABLE 1807.1.6.3(1) PLAIN MASONRY FOUNDATION WALLSa, b, c
MAXIMUM WALL HEIGHT (feet) | MAXIMUM UNBALANCED BACKFILL HEIGHTe (feet) | MINIMUM NOMINAL WALL THICKNESS (inches) | ||
Design lateral soil loada (psf per foot of depth) | ||||
30f | 45f | 60 | ||
7 | 4 (or less) 5 6 7 |
8 8 10 12 |
8 10 12 10 (solidc) |
8 10 10 (solidc) 10 (solidc) |
8 | 4 (or less) 5 6 7 8 |
8 8 10 12 10 (solidc) |
8 10 12 12 (solidc) 12 (solidc) |
8 12 12 (solidc) Note d Note d |
9 | 4 (or less) 5 6 7 8 9f |
8 8 12 12 (solidc) 12 (solidc) Note d |
8 10 12 12 (solidc) Note d Note d |
8 12 12 (solidc) Note d Note d Note d |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound
per square foot per foot = 0.157 kPa/m. a. For design lateral soil loads, see Section 1610. b. Provisions for this table are based on design and construction requirements specified in Section 1807.1.6.3. c. Solid grouted hollow units or solid masonry units. d. A design in compliance with Chapter 21 or reinforcement in accordance with Table 1807.1.6.3(2) is required. e. For height of unbalanced backfill, see Section 1807.1.2. f. Where unbalanced backfill height exceeds 8 feet and design lateral soil loads from Table 1610.1 are used, the requirements for 30 and 45 psf per foot of depth are not applicable (see Section 1610). |
TABLE 1807.1.6.3(2) 8-INCH MASONRY FOUNDATION WALLS WITH REINFORCEMENT WHERE d >= 5 INCHESa, b, c
MAXIMUM WALL HEIGHT (feet) | MAXIMUM UNBALANCED BACKFILL HEIGHTe (feet) | MINIMUM VERTICAL REINFORCEMENT-BAR SIZE AND SPACING (inches) | ||
Design lateral soil loada (psf per foot of depth) | ||||
30e | 45e | 60 | ||
7-4 | 4-0 (or less) 5-0 6-0 7-4 |
#4 at 48 #4 at 48 #4 at 48 #5 at 48 |
#4 at 48 #4 at 48 #5 at 48 #6 at 48 |
#4 at 48 #4 at 48 #5 at 48 #7 at 48 |
8-0 | 4-0 (or less) 5-0 6-0 7-0 8-0 |
#4 at 48 #4 at 48 #4 at 48 #5 at 48 #5 at 48 |
#4 at 48 #4 at 48 #5 at 48 #6 at 48 #6 at 48 |
#4 at 48 #4 at 48 #5 at 48 #7 at 48 #7 at 48 |
8-8 | 4-0 (or less) 5-0 6-0 7-0 8-8e |
#4 at 48 #4 at 48 #4 at 48 #5 at 48 #6 at 48 |
#4 at 48 #4 at 48 #5 at 48 #6 at 48 #7 at 48 |
#4 at 48 #5 at 48 #6 at 48 #7 at 48 #8 at 48 |
9-4 | 4-0 (or less) 5-0 6-0 7-0 8-0 9-4e |
#4 at 48 #4 at 48 #4 at 48 #5 at 48 #6 at 48 #7 at 48 |
#4 at 48 #4 at 48 #5 at 48 #6 at 48 #7 at 48 #8 at 48 |
#4 at 48 #5 at 48 #6 at 48 #7 at 48 #8 at 48 #9 at 48 |
10-0 | 4-0 (or less) 5-0 6-0 7-0 8-0 9-0e 10-0e |
#4 at 48 #4 at 48 #4 at 48 #5 at 48 #6 at 48 #7 at 48 #7 at 48 |
#4 at 48 #4 at 48 #5 at 48 #6 at 48 #7 at 48 #8 at 48 #9 at 48 |
#4 at 48 #5 at 48 #6 at 48 #7 at 48 #8 at 48 #9 at 48 #9 at 48 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound
per square foot per foot = 0.157 kPa/m. a. For design lateral soil loads, see Section 1610. b. Provisions for this table are based on design and construction requirements specified in Section 1807.1.6.3. c. For alternative reinforcement, see Section 1807.1.6.3.1. d. For height of unbalanced backfill, see Section 1807.1.2. e. Where unbalanced backfill height exceeds 8 feet and design lateral soil loads from Table 1610.1 are used, the requirements for 30 and 45 psf per foot of depth are not applicable. See Section 1610. |
TABLE 1807.1.6.3(3) 10-INCH MASONRY FOUNDATION WALLS WITH REINFORCEMENT WHERE d >= 6.75 INCHES a,b,c
MAXIMUM WALL HEIGHT (feet-inches) |
MAXIMUM UNBALANCED
BACKFILL HEIGHTd
(feet-inches) |
MINIMUM VERTICAL REINFORCEMENT-BAR SIZE AND SPACING (inches) | ||
Design lateral soil loada (psf per foot of depth) | ||||
30e | 45e | 60 | ||
7-4 | 4-0 (or less) 5-0 6-0 7-4 |
#4 at 56 #4 at 56 #4 at 56 #4 at 56 |
#4 at 56 #4 at 56 #4 at 56 #5 at 56 |
#4 at 56 #4 at 56 #5 at 56 #6 at 56 |
8-0 | 4-0 (or less) 5-0 6-0 7-0 8-0 |
#4 at 56 #4 at 56 #4 at 56 #4 at 56 #5 at 56 |
#4 at 56 #4 at 56 #4 at 56 #5 at 56 #6 at 56 |
#4 at 56 #4 at 56 #5 at 56 #6 at 56 #7 at 56 |
8-8 | 4-0 (or less) 5-0 6-0 7-0 8-8e |
#4 at 56 #4 at 56 #4 at 56 #4 at 56 #5 at 56 |
#4 at 56 #4 at 56 #4 at 56 #5 at 56 #7 at 56 |
#4 at 56 #4 at 56 #5 at 56 #6 at 56 #8 at 56 |
9-4 | 4-0 (or less) 5-0 6-0 7-0 8-0 9-4e |
#4 at 56 #4 at 56 #4 at 56 #4 at 56 #5 at 56 #6 at 56 |
#4 at 56 #4 at 56 #5 at 56 #5 at 56 #6 at 56 #7 at 56 |
#4 at 56 #4 at 56 #5 at 56 #6 at 56 #7 at 56 #7 at 56 |
10-0 | 4-0 (or less) 5-0 6-0 7-0 8-0 9-0e 10-0e |
#4 at 56 #4 at 56 #4 at 56 #5 at 56 #5 at 56 #6 at 56 #7 at 56 |
#4 at 56 #4 at 56 #5 at 56 #6 at 56 #7 at 56 #7 at 56 #8 at 56 |
#4 at 56 #4 at 56 #5 at 56 #7 at 56 #8 at 56 #9 at 56 #9 at 56 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8, 1 pound per square foot per foot = 0.157 kPa/m. |
a. For design lateral soil loads, see Section 1610. |
b. Provisions for this table are based on design and construction requirements specified in Section 1807.1.6.3. |
c. For alternative reinforcement, see Section 1807.1.6.3.1. |
d. For height of unbalanced backfill, See Section 1807.1.2. |
e. Where unbalanced backfill height exceeds 8 feet and design lateral soil loads from Table 1610.1 are used, the requirements for 30 and 45 psf per foot of depth are not applicable. See Section 1610. |
TABLE 1807.1.6.3(4) 12-INCH MASONRY FOUNDATION WALLS WITH REINFORCEMENT WHERE d >= 8.75 INCHESa, b, c
MAXIMUM WALL HEIGHT (feet-inches) |
MAXIMUM UNBALANCED BACKFILL
HEIGHTd (feet-inches) |
MINIMUM VERTICAL REINFORCEMENT-BAR SIZE AND SPACING (inches) | ||
Design lateral soil loada(psf per foot of depth) | ||||
30e | 45e | 60 | ||
7-4 | 4 (or less) 5-0 6-0 7-4 |
#4 at 72 #4 at 72 #4 at 72 #4 at 72 |
#4 at 72 #4 at 72 #4 at 72 #5 at 72 |
#4 at 72 #4 at 72 #5 at 72 #6 at 72 |
8-0 | 4 (or less) 5-0 6-0 7-0 8-0 |
#4 at 72 #4 at 72 #4 at 72 #4 at 72 #5 at 72 |
#4 at 72 #4 at 72 #4 at 72 #5 at 72 #6 at 72 |
#4 at 72 #4 at 72 #5 at 72 #6 at 72 #8 at 72 |
8-8 | 4 (or less) 5-0 6-0 7-0 8-8e |
#4 at 72 #4 at 72 #4 at 72 #4 at 72 #5 at 72 |
#4 at 72 #4 at 72 #4 at 72 #5 at 72 #7 at 72 |
#4 at 72 #4 at 72 #5 at 72 #6 at 72 #8 at 72 |
9-4 | 4 (or less) 5-0 6-0 7-0 8-0 9-4e |
#4 at 72 #4 at 72 #4 at 72 #4 at 72 #5 at 72 #6 at 72 |
#4 at 72 #4 at 72 #5 at 72 #5 at 72 #6 at 72 #7 at 72 |
#4 at 72 #4 at 72 #5 at 72 #6 at 72 #7 at 72 #8 at 72 |
10-0 | 4 (or less) 5-0 6-0 7-0 8-0 9-0e 10-0e |
#4 at 72 #4 at 72 #4 at 72 #4 at 72 #5 at 72 #6 at 72 #7 at 72 |
#4 at 72 #4 at 72 #5 at 72 #6 at 72 #6 at 72 #7 at 72 #8 at 72 |
#4 at 72 #4 at 72 #5 at 72 #6 at 72 #7 at 72 #8 at 72 #9 at 72 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound
per square foot per foot = 0.157 kPa/m. a. For design lateral soil loads, see Section 1610. b. Provisions for this table are based on design and construction requirements specified in Section 1807.1.6.3. c. For alternative reinforcement, see Section 1807.1.6.3.1. d. For height of unbalanced backfill, see Section 1807.1.2. e. Where unbalanced backfill height exceeds 8 feet and design lateral soil loads from Table 1610.1 are used, the requirements for 30 and 45 psf per foot of depth are not applicable. See Section 1610. |
Notes
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