Anchors That Hold

This 10-minute video shows how to install a guy screw-anchor with a known holding force. A coupling tool to measure mechanical torque is installed between the kelly bar on the digger derrick, and the anchor. The anchor is screwed into the earth. Because of the relationship between installing torque (foot-pounds) and anchor holding force (pounds), this procedure guarantees the anchor will have the holding force required.(Courtesy Hubbell)