d. Screw anchors may also be installed by using an earth-borer and boom truck.
8.
Installation of swamp screw anchors.
a. Determine the ground location for the guy and dig a starting hole about 12 inches (30.48 cm)
deep for the anchor. Screw a 6-foot (1.83 m) length of galvanized pipe of the appropriate size into the
threaded receptacle of the anchor. This pipe will serve as the anchor rod.
b. Position the anchor in the starting hole. Attach two chain-type pipe wrenches to the pipe rod.
Attach the wrenches with the handles of the wrenches pointing in opposite directions. Screw the anchor
into the ground.
c. Continue to screw the anchor into the ground until the pipe rod cannot be turned by four
people operating the wrenches. Couple additional lengths of pipe as required. Pipe anchor rods may be
allowed to extend from 3 to 12 inches (7.62 to 30.48 cm) out of the ground.
d. Attach a thimble-eye pipe cap to the end of the anchor pipe rod. Remove the pipe wrenches.
Backfill and tamp the starting hole.
9.
Installation of crossplate anchors.
a. Locate the position of the anchor hole and bore or dig a vertical hole to the desired depth for
the anchor. Make the circumference of the hole large enough to permit the anchor to be lowered into the
hole. Cut a slot in the earth for the anchor rod with a digging bar or other suitable tool. Cut this slot in
line with the proposed guy.
b. Crossplate anchors may be assembled as follows:
(1) Cut two pieces of treated lumber to a length corresponding to the size of the
manufactured anchor.
(2) Drill a hole for the anchor rod in the center of each piece of wood.
(3) Fasten the planks at right angles to each other with 30-penny galvanized nails.
(4) Place, in order, a square washer, the plank anchor, a second square washer, and the
anchor rod nut on the anchor rod. The size of the square washer will depend upon the size of the guy or
combination of guys to be anchored.
10.
Installation of log anchors. Use only sound and durable timber for log anchors. For example,
used poles or struts that are not set aside for other use may be cut for anchors. Whenever practical, use
treated timber, especially where the soil is not well drained.
SS0439
2-22
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