§ 6. ADJUSTING MANHOLE TOPS.
   The contractor shall raise or lower existing manhole tops to coincide with the finished grade elevation of the paving.
TABLE 4
CONVERSION FACTORS APPLICABLE TO BASES
 
Base Material
Conversion Ratio
Asphalt concrete
1.0
Asphalt treated base, gradations III or IV
1.3
Granular base
2.0
Granular subbase
3.0
NOTE TO TABLE:
The conversion factor shown is a conversion ratio, for each material, multiplied by the required design thickness of asphalt concrete to provide thickness of other bases that will give the same degree of performance.
 
TABLE 5
COMPOSITION LIMITS FOR ASPHALT MIXTURES
PERCENT PASSING BY WEIGHT
Sieve Size
Asphalt Concrete
Asphalt-Treated Base
Base I
Base II
Surface I
Surface II
Base III
Base IV
Sieve Size
Asphalt Concrete
Asphalt-Treated Base
Base I
Base II
Surface I
Surface II
Base III
Base IV
1-1/2 inch
100
--
--
--
100
--
1 inch
85-100
100
--
--
--
--
3/4 inch
--
80-100
--
--
70-100
100
1/2 inch
50-80
--
100
100
--
--
3/8 inch
--
54-76
80-100
--
40-80
70-100
No. 4
30-50
37-57
55-75
75-95
--
--
No. 8
25-45
25-45
35-60
60-85
25-60
40-100
No. 16
15-35
15-35
25-50
45-70
--
--
No. 50
5-20
5-20
9-21
15-40
5-30
15-50
No. 100
3-10
3-10
5-14
5-25
3-15
4-25
No. 200
--
--
3-7
4-10
--
--
% asphalt
3.5-6.0
4.0-7.0
5.0-8.0
6.0-9.0
3.5-6.0
4.0-8.0
 
TABLE 6:    THICKNESS REQUIREMENTS
FOR ASPHALT PAVED STREETS
 
Street Classification
Pavement Design
Total Minimum Thickness
(Method I)
Total Minimum Thickness
(Method 2)
Surface Type I or II (inch)
Base Type I
or II (inch)
Minimum Surface Type I or II (inch)
Minimum
Base Type I
or II (inch)
Minimum Granular Subbase (inch)
Local
1-1/2
6-1/2
1-1/2
2-1/2
9
Subcollector
1-1/2
7-1/2
1-1/2
3-1/2
10
Collector
1-1/2
8-1/2
1-1/2
5
8
NOTES TO TABLE:
(1) Methods 1 and 2 will produce approximately the same pavement quality and strength.
(2) Selection of the method shall be at contractor’s option.
(3) Following destinations pertinent to surface and base type used in this table correspond to the State Department of Highways standard specifications:
   Surface Type I = Class I, Type A (state highway designation)
   Surface Type II = Class I, Type L (state highway designation)
   Base Type I = Class I, Base (state highway designation)
   Base Type II = Class I, Binder (state highway designation)
   Granular base and granular subbase of Method 2 shall conform to composition limits specified in App. B, § 4(B)(4) and (5)
(4) Where streets are to serve industrial or commercial areas, the pavement design shall be based on a study prepared by the subdivider’s engineer projecting the type of vehicles using the street and traffic volumes approved by the Planning Commission’s duly authorized representative.
(5) Arterial streets shall be based on requirements of the state’s Department of Transportation.
 
(1984 Code, Ch. 157, App. B, § 6) (Ord. O-86-78, passed 8-17-1978)