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Earth Anchor Specifications
Manta Ray Specifications
Soil Description |
Blow count
(N) |
MR-88
Ultimate=
10 kips |
MR-4
Ultimate=
16 kips |
MR-3
Ultimate=
20 kips |
MR-2
Ultimate=
40 kips |
MR-1
Ultimate=
40 kips |
MR-SR
Ultimate=
40 kips |
MK-B
Ultimate=
40 kips |
| Very dense/cemented sands; Coarse gravel and cobbles |
60+ |
10
(1,3) |
16
(1,3) |
20
(1,3) |
28-40
(1,3,4) |
40
(1,3,) |
40
(1,3,5) |
40
(1,3,5) |
| Dense fine compacted sands, very hard silts or clays |
45-60 |
6 -10
(2,3,4)
|
9 - 16
(2,3,4) |
17 - 20
(2,3,4) |
21 - 28
(2,4) |
36 - 40
(1,3,4) |
40
(1,3) |
40
(1,3,5) |
| Dense Clays, Sands and gravels, hard silts and clays |
35-50 |
4-6
(4)
|
6 - 9
(4) |
12 - 18
(2,4) |
15-22
(2,4) |
24 - 36
(2,4) |
32 - 40
(2,3,4) |
40
(1,3) |
| Medium dense sandy gravel, stiff to hard slits and clays |
24-40 |
3-4
(4)
|
4.5-5.5
(4) |
9 -14
(4)
|
12-18
(4)
|
18-20
(2,4) |
24 - 34
(2,4)
|
32 - 40
(2,3,4) |
| Medium Dense Coarse sand and sandy gravel, Stiff to Very stiff silts and Clays |
14-25 |
2-3
(4)
|
3.5-4.5
(4) |
7-9
(4) |
9-12
(4)
|
15-20
(4)
|
18-24
(4) |
24-32
(2,4) |
| Loose to Medium Dense Fine to Coarse Sand: Firm to Stiff Clays and Silts |
7-14 |
1.5-2.5
(4) |
2.5-4
(4) |
5-8
(4) |
7-10
(4) |
10-15
(4) |
14-18
(4) |
20- 24
(4) |
| Loose Fine Sand, Alluvium, Soft Clays, Fine saturated Silty Sand |
4-8 |
.9-1.5
(4,6)
|
1.5-2.5
(4,6) |
3-5
(4,6) |
5-8
(4,6) |
8-12
(4,6) |
9-14
(4,6) |
13-20
(4,6) |
|
