CHANCE® Helical Anchors

CHANCE Helical Anchors LogoSince the early 1960s, CHANCE® Helical Anchors have been used in the electric transmission industry as the primary guy anchor solution. Today, these screw anchor foundations are finding increased popularity in civil construction applications because of the versatility and cost-effectiveness of this uplift (tension) restraint solution. CHANCE® helical ground anchors extend bearing plates through soft, loose, or expansive surface soils into stable strata with minimal disturbance. Discover how helical earth screw anchor systems are the predictable, cost-effective, quickly installed alternative to traditional uplift restraint methods.

A New Look at Helical Anchor Systems

Helical anchors are commonly selected for earth anchoring applications because they are quick to install and can be proof-tested and loaded immediately with no concrete to cure or de-watering of the excavation to deal with. Helical earth screw anchors are often chosen over traditional anchoring methods such as concrete deadmen or grouted anchors in order to overcome limited accessibility or the presence of a high water table.

CHANCE® Helical Pile Installation DemonstrationCHANCE® Helical Pulldown® piles are quick and easy to install. You need relatively small equipment with little to no ground preparation. Learn how load capacities can be substantially increased by watching this video from CHANCE® and Foundation Technologies.

Helical Anchors Have Quick, Controlled Installation

A helical ground anchor is used to resist tensile loading. For these tension-only soil anchors, square shaft helical anchors are the logical choice. The helical anchor is segmented with helical bearing plates welded to a central steel square shaft. Load is transferred through the shaft to the soil through the bearing plates. CHANCE screw anchors are coupled together with couplings, and the only limit to installation depth for these earth anchors is soil density. Engineers can achieve whatever depth makes sense economically.

Since the plates are helical, they do not auger, but rather screw into the soil with minimal disturbance. Helical bearing plates have a standard 3" pitch and are spaced at far enough distances from enough apart that they bear load independently of each other; therefore, the load capacity of one is not influenced by adjacent plates.

Helical Anchor Applications

Case Studies

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