Nom. Size in Inches
|
Ft-Lbs.
|
---|---|
8
|
210
|
10
|
220
|
12
|
220
|
15
|
220
|
Test
|
ASTM Ref.
|
Requirements
|
---|---|---|
Quick Burst Test
|
D1599
|
630 PSI applied in 60 to 70 sec.
|
Sustained Pressure Test
|
D1598
|
1,000 hrs. @ 420 PSI
|
Acetone Immersion Test
|
D2152
|
No visible spalling or cracking after 20 minutes
|
Vise Test
|
—
|
No splitting or shattering when compressed 60% in 2 to 5 minutes
|
Manhole Depth
|
Minimum Wall Thickness
|
---|---|
0 to 16 feet
|
1/12 of internal diameter
|
16 feet or greater
|
1/12 of internal diameter + 1"
|
Minimum internal diameter of any manhole section shall be four
(4) feet. Dampproofing shall be factory applied on all interior and
exterior surfaces except to the interior surface of the bottom section.
Dampproofing shall be field applied to the interior surface of the
bottom section after base and fillet have been placed. Dampproofing
system shall be Koppers Coal Tar Bitumastic Super Service Black or
an approved alternate, applied to manufacturer's specifications. Two
(2) coats, each of minimum fourteen (14) mils dry thickness, shall
be applied. A seventy-five-volt maximum wet sponge detector shall
be employed to check for holidays in the dried finish film. Manhole
access opening shall be twenty-two (22) inches diameter, minimum.
|
Sieve Size
|
Percent Passing
|
---|---|
1"
|
100
|
3/4"
|
90-100
|
3/8"
|
20-55
|
No. 4
|
0-10
|
No. 8
|
0-5
|
Pipe Diameter in Inches
|
Minimum Time
(min., sec.)
|
Max. Length
(ft.) for Min. Time
|
Time (sec.) for Longer Length
(L)
|
---|---|---|---|
4
|
3:46
|
597
|
0.380 L
|
6
|
5:40
|
398
|
0.854 L
|
8
|
7:34
|
298
|
1.520 L
|
10
|
9:26
|
239
|
2.374 L
|
12
|
11:20
|
199
|
3.418 L
|
15
|
14:10
|
159
|
5.342 L
|
18
|
17:00
|
133
|
7.692L
|
21
|
19:50
|
114
|
10.470 L
|
24
|
22:40
|
99
|
13.674 L
|
27
|
25:30
|
88
|
17.306 L
|
30
|
28:20
|
80
|
21.366 L
|
33
|
31:10
|
72
|
25.852 L
|
36
|
34:00
|
66
|
30.768 L
|
Manhole Depth
|
Time (minutes)
|
---|---|
10 feet or less
|
2.0
|
10.1 feet to 15 feet
|
2.5
|
15.1 feet to 25 feet
|
3.0
|