All items must be Chance brand SS175 Helical Anchors or an equivalent product meeting the following requirements: 1. Torque Strength Rating: 10,500 ft-lb 2. Ultimate Capacity (compression): 105 kip 3. Galvanization: All components must be hot-dip galvanized in compliance with ASTM A153. 4. Shaft Material: Must be 1-3/4” hot-rolled round-cornered-square (RCS) solid steel bars per ASTM A29. Minimum yield strength 90 KSI. 5. Helix Material: Must be hot-rolled low alloy steel sheet, strip, or plate per ASTM A 656 or A1018 Grade 8. Minimum yield strength 80 KSI. Thickness ½” thick for 8” helices, 3/8” thick for all other helices. 6. Helix Plate Spacing: Nominal spacing between helix plates shall be three times the diameter of the lower helix. 7. Helix Pitch: 3” pitch required
