Encyclopedia of Anchoring (CA06114E)

ANCHOR INSTALLING TOOL SAFETY

Use proper tooling During the installation of power-installed screw anchors (PISA®), it is essential to use installing tools and anchors that are properly rated for your trucks. Because of the high torque energy used in installing high-strength anchors with the new generation of trucks, the control of hazardous torque depends on several factors but especially proper tools.

The locking dog assembly and Kelly bar adapter of the high strength wrench assembly use a 7-⅝” bolt circle with ⅝” Grade 5 bolts compared to the 5-¼” bolt circle with ½” Grade 5 bolts used on standard-strength 10,000 ft.-lb. tooling. The larger bolt circle used in the high-strength tooling puts less stress on bolts and, in conjunction with the larger bolts that are used, allows installing torques to reach 15,000 ft.-lb. during demanding installations.

Use 15,000 ft.-lb. tooling when torque exceeds 10,000 ft.-lb.

Whenever anchor torque capacity and digger output capacity exceed 10,000 ft.-lb., use the 15,000 ft.-lb. CHANCE® Tough One® anchor wrench assembly. This high-strength assembly is designed for today’s anchors and installing trucks.

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CHANCE Digital Torque Indicator

Recommended Tightening Torques

½” Gr. 5

60 - 75 ft. - lb. strength.

⅝” Gr. 5

76 - 95 ft. - lb.

Do not use 10,000 and 15,000 ft.-lb. tooling above its rated performance strength.

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