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Prodotti per CAMPI EOLICI -- DESCRIZIONE PRODOTTO
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Ancoraggi MANTA RAY
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Ancoraggi MANTA RAY
Sistemi di ancoraggio al suolo Manta Ray earth anchors are driven tipping plate soil anchors dependant on soil strength for reaction of tensile loads. Manta Ray anchors have working loads up to 20 kips. After driving the anchor to the required depth, the driving tool (called drive steel) is removed. The anchor is then tipped and proof tested with Williams Anchor Locking Kit from its edgewise-driving position to present its bearing area to the soil. This is called "load locking" and provides an immediate proof test of each anchor. There are eight Manta Ray Anchors with light to heavy duty holding capacities. Shown to the left are six different Manta Ray anchor heads. All anchors are made of galvanized ductile iron, can be driven with the drive steel set (except the MR-88) and can be tested to the desired holding capacity with the load locker.
The anchors are designed to utilize solid steel rods as load carrying members.
Manta Ray Anchor Holding Capacities in Listed Soils Common Soil
Type Description | Typical
Blow
Count
"N" Per
ASTM-D1586 | MR-88 | MR-4 | MR-3 | MR-2 | MR-1 | MR-SR | Peat, Organic Silts;
Inundates Silts, Fly Ash | 0 - 5 | 0.2-0.9 kips
(.9-4 kN)
(4,6) | 0.3-1.5 kips
(1.3-7 kN)
(4,6) | 0.8-3 kips
(3.5-13 kN)
(4,6) | 2-5 kips
(9-22 kN)
(4,6) | 3-8 kips
(13-37 kN)
(4,6) | 4-12 kips
(18-53 kN)
(4,6) | Loose fine Sand;
Alluvium; Soft-Firm Clays;
Varied Clays; Fills | 4 - 8 | 0.9-1.5 kips
(4-7 kN)
(4,6) | 1.5-2.5 kips
(7-11 kN)
(4,6) | 3-5 kips
(13-22 kN)
(4,6) | 5-8 kips
(22-36 kN)
(4,6) | 8-12 kips
(36-53 kN)
(4,6) | 9-14 kips
(40-62 kN)
(4,6) | Loose to Medium Dense
Fine to Coarse Sand; Firm
to Stiff Clays and Silts | 7 - 14 | 1.5-2.5 kips
(7-11 kN)
(4) | 2.5-4 kips
(11-18 kN)
(4) | 5-8 kips
(22-36 kN)
(4) | 7-10 kips
(31-44 kN)
(4) | 10-15 kips
(44-67 kN)
(4) | 14-18 kips
(62-80 kN)
(4) | Medium Dense Coarse
Sand and Sandy Gravel;
Stiff to very Stiff Silts and Clays | 14 - 25 | 2-3 kips
(9-13 kN)
(4) | 3.5-4.5 kips
(16-20 kN)
(4) | 7-9 kips
(31-40 kN)
(4) | 9-12 kips
(40-53 kN)
(4) | 15-20 kips
(67-89 kN)
(4) | 18-20 kips
(80-89 kN)
(4) | Medium Dense Sandy
Gravel; Very Stiff to
Hard Silts and Clays | 24 - 40 | 3-4 kips
(13-18 kN)
(4) | 4.5-6 kips
(20-25 kN)
(4) | 9-10 kips
(40-45 kN)
(4) | 12-18 kips
(53-80 kN)
(4) | 18-20 kips
(80-89 kN)
(2,4) | 20 kips
(89 kN)
(2,4) | Dense Clays, Sands
and Gravel;
Hard Slits and Clays | 35 - 50 | 4-5 kips
(18-22 kN)
(4) | 6-8.5 kips
(27-36 kN)
(4) | 10 kips
(45 kN)
(2,4) | 15-20 kips
(67-89 kN)
(2,4) | 20 kips
(89 kN)
(2,4) | 20 kips
(89 kN)
(2,3,4) | Dense Fine Sand;
Very hard Silts and Clays | 45 - 60 | 5 kips
(22 kN)
(2,3,4) | 8.5 kips
(36 kN)
(2,3,4) | 10 kips
(45 kN)
(2,3,4) | 20 kips
(89 kN)
(2,4) | 20 kips
(89 kN)
(1,3,4) | 20 kips
(89 kN)
(1,3) | Very Dense and/or
Cemented Sands;
Coarse Gravel and Cobbles | 60 - 100+ | 5 kips
(22 kN)
(1,3) | 8.5 kips
(36 kN)
(1,3) | 10 kips
(45 kN)
(1,3) | 20 kips
(89 kN)
(1,3,4) | 20 kips
(89 kN)
(1,3) | 20 kips
(89 kN)
(1,3,5) |
1 - Drilled hole required to install.
2 - Installation may be difficult. Pilot hole may be required.
3 - Holding capacity limited by working load of anchors
4 - Holding capacity limited by soil failure.
5 - Not recommended in these soils.
6 - Wide variation in soil properties reduces prediction accuracy.
Pre-constructed field test recommended.
Minimum 2:1 Safety Factor Recommended
* Use this chart for estimation only.
* True capacity must be tested with anchor locker. Manta Ray Anchor Structural Properties Anchor | Structural
Safety
Factor 2:1 | Recommended Anchor Rod | Weight
Per
Each | Part Number
& Diameter** | Part
Number | MR-88 | 5 kips
(22 kN) | 1/2" - 13 UNC
(12 mm) | B8S-04 | 2.2 lbs.
(1 kg) | MR-4 | 8.5 kips
(36 kN) | 3/4"
(20 mm) | R61-06 | 4.7 lbs.
(2.1 kg) | MR-3 | 10 kips
(45 kN) | 3/4"
(20 mm) | R61-06 | 6 lbs.
(2.7 kg) | MR-2 | 20 kips
(89 kN) | 3/4"
(20 mm) | R61-06 | 10 lbs.
(4.5 kg) | MR-1 | 20 kips
(89 kN) | 3/4"
(20 mm) | R61-06 | 12 lbs.
(5.4 kg) | MR-SR | 20 kips
(89 kN) | 3/4"
(20 mm) | R61-06 | 21 lbs.
(9.5 kg) | MK-B | 20 kips
(89 kN) | 3/4"
(20 mm) | R61-06 | 85 lbs.
(38.5) |
**Anchor Rod Lengths: R61-06 & R61-09 up to 50 feet uncoated. B8S-03 & B8S-04 up to 20 feet
Recommend: Galvanized rods should be cut to size prior to galvanizing to insure good nut fit.
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