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    Anchors

    EZ30 30" Single Eye Screw Anchor

    3 Foot (30") Long Telescopic TV Mast Down Guy Screw Anchor
    Price$17.95
    Manufacturer Code: EZ 30
    Average Rating: 5
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    ROHN GAS4303 Single Eye Screw Anchor

    ROHN 3 Foot Long Down Guy Screw Anchor R-GAS4303
    Price$24.95
    Manufacturer Code: GAS4303
    Average Rating: 5
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    EZ48 48" Single Eye Screw Anchor

    4 Foot Long Telescopic TV Mast Down Guy Screw Anchor
    Price$28.01
    Manufacturer Code: EZ 48
    Average Rating: 5
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    ROHN GAS604 48" Single Eye Screw Anchor

    ROHN 4 Foot Long Down Guy Screw Anchor R-GAS604
    Price$69.95
    Manufacturer Code: GAS604
    Average Rating: 5
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    ROHN GAS625 48" Single Eye 10" Helix Screw Anchor

    ROHN GAS625 48"" Single Eye 10"" Helix Screw Anchor
    Price$59.95
    Manufacturer Code: GAS625
    Average Rating: 5
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    6in x 66in Thimbleye Anchor Rod

    Anchor, No Wrench, 6in x 66in Thimbleye
    Price$29.95
    Manufacturer Code: J6526WCA
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    ROHN EP25343 3 Hole Equalizer Plate Assembly for Concrete Down Guy Anchor Rod

    ROHN EP25343 3 Level Guy Equalizer Plate Kit
    Price$49.95
    Manufacturer Code: EP25343
    Average Rating: 5
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    ROHN EP25345 5 Hole Equalizer Plate Assembly for Concrete Down Guy Anchor Rod

    ROHN EP25345 5 Level Guy Equalizer Plate Kit
    Price$69.95
    Manufacturer Code: EP25345
    Average Rating: 5
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    ROHN Tower GAR30 Concrete Down Guy Anchor Rod with Single Eye

    ROHN 25G 45G 55G 65G Tower Concrete Guy Anchor Rod with Single Eye R-GAR30
    Price$42.50
    Manufacturer Code: GAR30
    Average Rating: 5
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    ROHN Tower GAC303 Concrete Down Guy Anchor with 3 Hole Equalizer Plate Assembly

    ROHN 25G 45G 55G 65G Tower Concrete Guy Anchor Rod with 3 Hole Down Guy Equalizer Plate Assembly R-GAC303
    Price$89.95
    Manufacturer Code: GAC303
    Average Rating: 5
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    ROHN Tower GAC305 Concrete Down Guy Anchor with 5 Hole Equalizer Plate Assembly

    ROHN 25G 45G 55G 65G Tower Concrete Guy Anchor Rod with 5 Hole Down Guy Equalizer Plate Assembly R-GAC305
    Price$97.95
    Manufacturer Code: GAC305
    Average Rating: 5
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    ROHN Tower GAC3455TOP Concrete Down Guy Anchor with 5 Hole Equalizer Plate

    ROHN GAC3455TOP Concrete Tower Down Guy Anchor
    Price$149.95
    Manufacturer Code: GAC3455TOP
    Average Rating: 5
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    Anchors

    Guy Wire Anchors

    Shear Force
    Figure 1: Shear Force

    Guy Anchors are used to attach the guy-wire that helps support a tower, antenna mast or even utility poles. The anchoring is accomplished by using rods, usually  made from galvanized steel, that are screw driven, concreted into the ground or backfilled with earth.

    An  anchor must be designed and rated to resist the maximum amount of tensile  load, forces tending to cause extension of the guy wires and anchoring system; both the dead load of the tension of the wire and the maximum possible theroretical live load due to wind,  gravity, ice and other forces of nature. The attached guy wires exercises its force at an angle, and because of this angle the anchor will  have resist two forces of both, vertical or (up and down) and lateral (back and forth) forces on it known as lateral shear. Ground anchors rely on the lateral shear  strength of the soil. This strength or cohesion helps to mitigate by spreading the the forces from the guys wires connected  to it over a large surface area.

     

    Cohesion is a measure of the forces that cement particles of soils. For  example dry sand has very little cohesion where as stiff clay has a lot.  Choosing the right anchors is just as important as choosing the location and  type of soil they will be used in.

    Methods of Anchoring

    Dead Man Anchoring

    This method employs a large excavated area that is made into  the ground along with a perpendicular bore that the anchor rod is placed into.  The excavated area is usually reinforced with rebar. A diagonal rod with an  eyelet extending in the guy direction is inserted into the bored hole and the  rod, the bored hole and the excavated area are then filled with concrete. This creates  a large surface area that the guy wires can attached to. In the past a  dead man anchor was made by burring a log horizontally in a trench with the guy  attached perpendicularly to its center. This is the most common method used for  larger guyed towers.

    Screw Anchoring

    Diagram of a tower guy anchoring system
    Diagram of a tower guy anchoring system

    Using a rod that is  designed with a wide screw on the end of it and an eyelet on the other for the  guys to attach like the EZ 30 or EZ 48. It is screwed deep into the ground, at the  same angle as the guy, by a truck-mounted drill machine. These are commonly  used as guy anchors for utility poles since they are quick to install with a  truck mounted hydraulic powered auger drive.

    Grouted Anchoring

    Grouted Anchoring is used in rocks and in rocky soils. In this method, first a hole is drilled at the angle of the guy. Then a steel anchor rod with an eye is inserted, the hole and a large area around the perimeter of the hole are then filled with a special type of grout. The grout is made by mixing concrete and a structual expansion additive. This additve is a specially formulated structural epoxy. When the grout sets it expands into the surounding rocky and porus soil which secures the anchor.