Table 1
| ||||
---|---|---|---|---|
Minimum Material Type and Layer Thickness Requirements
For Residential Streets: 1 to 500 Units
| ||||
Pavement Layer
|
Good Subgrade Soil
|
Poor Subgrade Soil
| ||
1 to 50 units
| ||||
Wearing (surface) course (inches)
|
1 1/2
|
1 1/2
| ||
Binder course (inches)
|
3
|
2
| ||
Bit. conc. base conc. (inches)
|
—
|
3
| ||
Aggregate subbase (inches)
|
8
|
8
| ||
Structural number
|
2.7
|
3.26
| ||
Geotextile separator
|
Yes
|
Yes
| ||
51 to 100 units
| ||||
Wearing (surface) course (inches)
|
1 1/2
|
1 1/2
| ||
Binder course (inches)
|
2
|
2
| ||
Bit. conc. base conc. (inches)
|
3
|
3 1/2
| ||
Aggregate subbase (inches)
|
6
|
8
| ||
Structural number
|
2.93
|
3.42
| ||
Geotextile separator
|
Yes
|
Yes
| ||
101 to 200 units
| ||||
Wearing (surface) course (inches)
|
1 1/2
|
1 1/2
| ||
Binder course (inches)
|
2
|
2 1/4
| ||
Bit. conc. base conc. (inches)
|
3 1/2
|
4
| ||
Aggregate subbase (inches)
|
6
|
8
| ||
Structural number
|
3.19
|
3.68
| ||
Geotextile separator
|
Yes
|
Yes
| ||
201 to 300 units
| ||||
Wearing (surface) course (inches)
|
1 1/2
|
1 3/4
| ||
Binder course (inches)
|
2
|
2 1/2
| ||
Bit. conc. base conc. (inches)
|
3 1/2
|
4
| ||
Aggregate subbase (inches)
|
8
|
8
| ||
Structural number
|
3.42
|
3.88
| ||
Geotextile separator
|
Yes
|
Yes
| ||
301 to 500 units
| ||||
Wearing (surface) course (inches)
|
1 3/4
|
2
| ||
Binder course (inches)
|
2 1/2
|
3
| ||
Bit. conc. base conc. (inches)
|
3 1/2
|
4
| ||
Aggregate subbase (inches)
|
8
|
9
| ||
Structural number
|
3.72
|
4.29
| ||
Geotextile separator
|
Yes
|
Yes
|
Table 2
| |||
---|---|---|---|
Minimum Material Type and Layer Thickness Requirements
For Industrial and Commercial Streets: Up to 50,000 Square Feet Building
Space
| |||
Pavement Layer
|
Good Subgrade Soil
|
Poor Subgrade Soil
| |
Wearing (surface) course (inches)
|
1 1/2
|
1 1/2
| |
Binder course (inches)
|
1 3/4
|
2
| |
Bit. conc. base conc. (inches)
|
3
|
3
| |
Aggregate subbase (inches)
|
6
|
8
| |
Structural number
|
2.93
|
3.26
| |
Geotextile separator
|
Yes
|
Yes
|