ADT
|
=
|
500
| |
% Trucks
|
=
|
10%
| |
CBR
|
=
|
3
|
Table I
Pavement Design Guidelines
(Minimum Depths)
| ||||
---|---|---|---|---|
Functional Classification
Pavement Alternates
|
Local
Access
|
Collectors
|
Arterials
| |
P.C.C. (inches)
|
6
|
6
|
8
| |
Subbase (inches)
|
6
|
6
|
6
| |
| ||||
R.C.C. (inches)
|
N/A
|
N/A
|
6
| |
Subbase (inches)
|
6
| |||
| ||||
ID-2 (inches)
|
3 1/2
|
3 1/2
|
3 1/2
| |
CABC, CABC-DG (inches)
|
6
|
8
|
8
| |
Subbase (inches)
|
6
|
6
|
6
| |
| ||||
ID-2 (inches)
|
3 1/2
|
3 /2
|
3 1/2
| |
Agg-Cem or
|
5
|
5
|
5
| |
A-L-P (inches)
| ||||
Subbase (inches)
|
6
|
6
|
6
| |
| ||||
ID-2 (inches)
|
1 1/2
|
3 1/2
|
3 1/2
| |
BCBC (inches)
|
4 1/2
|
4
|
4
| |
Subbase (inches)
|
6
|
6
|
6
| |
| ||||
ID-2 (inches)
|
1 1/2
|
3 /2
|
3 1/2
| |
Agg B BC (inches)
|
5
|
5
|
5
| |
Subbase (inches)
|
6
|
6
|
6
| |
| ||||
Bituminous Surface
(inches)
|
3/4
|
N/A
|
N/A
| |
Treatment (Section 480)
| ||||
Subbase (inches)
|
6
| |||
|
PCC
|
— Plain Cement Concrete
| |
RCC
|
— Reinforced Cement Concrete
| |
CABC
|
— Crushed Aggregate Base Course
| |
CABC-DG
|
— Crushed Aggregate Base Course
- Dense Graded
| |
A-L-P
|
— Aggregate - Lime - Pozzolan
| |
BCBC
|
— Bituminous Concrete Base
Course
| |
PCCBC
|
— Plain Cement Concrete Base
Course
|
NOTES:
| |||
---|---|---|---|
1.
|
All components of the pavement structure are
to be in accordance with PDT Publication 408. The coarse aggregate
used in bituminous wearing course shall meet the Skid Resistance Level
(SRL) letter designation based an the Daily Traffic as required by
the current Pennsylvania Department of Transportation directive.
| ||
2.
|
Refer to DM-2, Chapter 11 for additional information
on pavement design.
|
Select Backfill Gradation Requirements
| ||
Sieve Size
|
Percent Passing By Weight
| |
2-inch
|
100%
| |
No. 4
|
15% to 60%
| |
No. 100
|
10% to 35%
| |
No. 200
|
5% to 20%
|