The Duckbill Complete can be driven to any depth, at any angle. Normally all
models can be driven in Class 5 & 6 soils. The angle of anchor placement should
match the angle of the pull.
- FULCRUM; Attach the cable to an end of the drive rod and place a fulcrum
under the rod. Apply downward pressure on the other end of the rod to pull
the cable upward until movement ceases. The anchor is locked in position
and full load may be attached.
- WINCH; The anchor can be set by an upward force supplied by an automotive winch.
- JACK; Either Handyman or hydraulic jacks will provide the needed upward
force to lock the anchor into position.
- BOOTSTRAPPING; A method of anchor-setting that increases the holding power
of the anchor. First soil is mounted around the cable, and then the cable is fed through a compaction plate which pulls upward on the cable and pushes downward on the soil around the anchor. Downward pressure compresses the soil, increasing its density and holding power. After a cable has been attached through the anchor eye, the anchors are driven into the earth by inserting a drive rod into the barrel of the anchor. Using a sledge hammer, a pneumatic, gasoline, or hydraulic hammer to pound the drive rod, and the anchor can be lodged in at the required depth.
When resistance is encountered, excessive pounding causes metal fatigue that may
lead to breakage. Sub-surface rocks can prevent placement to required depth.
After the anchor is placed to the required depth,
the drive rod is removed. Backfill the hole with dirt and tap firmly with the drive rod.
Note: Instead of backfilling with dirt, inject concrete into the anchor hole before 'planing'. When the concrete sets, it forms a plug above the anchor for additional soil resistance. This method is used to increase holding capacity of the Duckbill Complete.