Table 2-9 – Maximum Cover(1) for Hancor Sure-Lok and
Hi-Q Pipe, ft.
|
|
|
|
Class I
|
Class II
|
Class III
|
|
Diameter
|
compacted
|
uncompacted
|
95%
|
90%
|
85%
|
95%
|
90%
|
85%
|
|
4
|
70
|
24
|
45
|
31
|
24
|
32
|
24
|
22
|
|
6
|
66
|
21
|
42
|
29
|
21
|
27
|
22
|
20
|
|
8
|
60
|
19
|
38
|
26
|
19
|
24
|
20
|
17
|
|
10
|
56
|
17
|
35
|
24
|
17
|
26
|
18
|
15
|
|
12
|
59
|
18
|
37
|
25
|
18
|
25
|
19
|
17
|
|
15
|
57
|
17
|
36
|
24
|
17
|
23
|
18
|
16
|
|
18
|
54
|
16
|
34
|
23
|
16
|
23
|
17
|
14
|
|
24
|
52
|
15
|
33
|
22
|
15
|
22
|
16
|
13
|
|
30
|
51
|
14
|
32
|
21
|
14
|
22
|
15
|
13
|
|
36
|
48
|
12
|
30
|
20
|
12
|
20
|
14
|
11
|
|
42
|
47
|
12
|
30
|
19
|
12
|
20
|
13
|
11
|
|
48
|
44
|
11
|
28
|
18
|
11
|
19
|
12
|
10
|
|
54
|
44
|
11
|
28
|
18
|
11
|
18
|
12
|
10
|
|
60
|
44
|
11
|
28
|
18
|
11
|
19
|
12
|
10
|
|
Notes:
1. Calculations assume no hydrostatic pressure and a density of 120 pcf
(1926 kg/m3) for overburden material.
2. Backfill materials and compaction levels not shown in the table may
also be acceptable. Contact Hancor for further detail.
|