Use Proper Tooling in Anchor Installation

Posted by Tim Staelens on Nov 13, 2018 10:38:00 AM

It is essential to use installing tools and anchors that are properly rated for trucks during the installation of power-installed screw anchors (PISA®). The high torque energy used in installing high-strength anchors requires the control of hazardous torque, which can be safely completed by proper tools. 

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Topics: Anchors

Understanding Grouted Rock Anchors

Posted by Tim Staelens on Nov 5, 2018 3:07:00 PM

The CHANCE® grouted rock anchor is designed to be used in situations where the soil is too rocky to use screw anchors, and the rock is fractured preventing the use of wedge style rock anchors. The forged knob on the end of the anchor along with any extension couplings provides the interference fit with the grout. The holding capacity of the anchor is dependent on the bond stress between the rock and the grout. The grouted rock anchor is designed to be used in line with the guy. Failure to install within 5° of alignment with the guy load will significantly lower strength.

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Topics: Anchors

Evaluating Utility Foundations During Storm Restoration

Posted by Hubbell Power Systems on Sep 10, 2018 1:45:00 PM

Rising water can damage or weaken existing transmission line and substation utility foundations. In flooded areas, drilled shafts and driven piles need to be inspected to determine if damage has occurred as a result of erosion. Here’s what you need to check:

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Topics: Foundations, Anchors

The Science of Soil Mechanics & Holding Capacity

Posted by Tim Staelens on Jul 23, 2018 3:41:00 PM

Historical Analysis

During the early development of the screw anchor, the load resistance of an installed anchor could not be predicted with adequate accuracy. Specific information on soil conditions was lacking, making anchor selection more or less a guess. With little consideration for soil variations, the effects of seasonal weather changes or drainage, soils were classified as: either sand, clay, hardpan or swamp. At that time, there was not a definitive explanation for the soil conditions.

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Topics: Anchors

5 Tips to Inspecting Guy Anchors after a Storm

Posted by Hubbell Power Systems on Sep 13, 2017 2:07:00 PM

When utility crews are dealing with the aftermath of storms, they cannot forget to evaluate how the guy anchors have been impacted.  Rebuilding the overhead lines depends more than ever on the holding capacity of the guy anchor.

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Topics: Anchors, Construction