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MANTA RAY HOLDING CAPACITIES
In KIP's. Click here for KN
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Soil Description
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Blow count
(N)
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MR-88
Ultimate=
10 kips
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MR-4
Ultimate=
16 kips
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MR-3
Ultimate=
20 kips
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MR-2
Ultimate=
40 kips
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MR-1
Ultimate=
40 kips
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MR-SR
Ultimate=
40 kips
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MK-B
Ultimate=
40 kips
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| Very dense/cemented sands; Coarse gravel and cobbles |
60+
|
10
(1,3)
|
16
(1,3)
|
20
(1,3)
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28-40
(1,3,4)
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40
(1,3,)
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40
(1,3,5)
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40
(1,3,5)
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| Dense fine compacted sands, very hard silts or clays |
45-60
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6 -10
(2,3,4)
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9 - 16
(2,3,4)
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17 - 20
(2,3,4)
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21 - 28
(2,4)
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36 - 40
(1,3,4)
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40
(1,3)
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40
(1,3,5)
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| Dense Clays, Sands and gravels, hard silts and clays |
35-50
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4-6
(4)
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6 - 9
(4)
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12 - 18
(2,4)
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15-22
(2,4)
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24 - 36
(2,4)
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32 - 40
(2,3,4)
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40
(1,3)
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| Medium dense sandy gravel, stiff to hard slits and clays |
24-40
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3-4
(4)
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4.5-5.5
(4)
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9 -14
(4)
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12-18
(4)
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18-20
(2,4)
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24 - 34
(2,4)
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32 - 40
(2,3,4)
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| Medium Dense Coarse sand and sandy gravel, Stiff to Very stiff silts and
Clays |
14-25
|
2-3
(4)
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3.5-4.5
(4)
|
7-9
(4)
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9-12
(4)
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15-20
(4)
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18-24
(4)
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24-32
(2,4)
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| Loose to Medium Dense Fine to Coarse Sand: Firm to Stiff Clays and Silts |
7-14
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1.5-2.5
(4)
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2.5-4
(4)
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5-8
(4)
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7-10
(4)
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10-15
(4)
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14-18
(4)
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20- 24
(4)
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| Loose Fine Sand, Alluvium, Soft Clays, Fine saturated Silty Sand |
4-8
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.9-1.5
(4,6)
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1.5-2.5
(4,6)
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3-5
(4,6)
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5-8
(4,6)
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8-12
(4,6)
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9-14
(4,6)
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13-20
(4,6)
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1) Drilled pilot hole required for efficient installation
2) Ease of installation may be improved by drilling a pilot hole
3) Holding capacity limited by ultimate strength of anchors
4) Holding capacity limited by soil structure
5) Not recommended in these soils
6) Wide variation in soil properties reduces prediction accuracy. Pre construction field test is recommended. |
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