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The Duckbill Complete provides safe installation in virgin soil,and can be driven into soil classes 5 & 6. *This B & R Stamping Earth Anchor is not intended for penetrating soild rock, hard clay, or compact gravel.
Specifications: ASTM B26-72 Sand casting Alloy ZC81-A Federal Spec. QQ-A-61d (1) Tenzaloy. Anchoring in soil classes 5 & 6 (200 1n/lbs. to 350 in/lbs. rated by torque probe test)
Indicates the following: #68- 7/8" O.D. X 4 3/4" (2 1/2 oz) Class 5 soil (Ultimate) 3,000 lbs. 30" depth Class 6 soil (Ultimate) 2,000 lbs. 30" depth
#88- 15/16" O.D. X 5 5/8" (7 1/2 oz)29_100_1542.JPG Class 5 soil (Ultimate) 5,800 lbs. 36" depth Soil conditions of test - Moisture content 7% to 15%. Soil consisted of layers with loose to coarse gravel.
Note: All tests conducted were ultimate to soil or anchoring failures.