How do I determine the holding capacity of an anchor?

  • Anchor holding capacity depends on the strength of the soil and the strength of the anchor. Each anchor type shown in our catalog or on our website has a chart that will show the holding capacity based on the soil type and the size of the anchor. Also, shown on the website is a soil classification chart.    
  • The use of a torque indicator can help predict the holding capacity of Helical Anchors. In general, the higher the torque the higher the holding capacity. The holding capacity based on installation torque is shown in charts on the website for the PISA® and square shaft style anchors. 
  • The holding capacity is the ultimate capacity without any strength reduction factors included. Holding capacity depends on properly installed anchors. 

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