Reuters There are two main ways the wood chips can protect the snow from the sun according to Benz. Pile head Fixed or adjustable the pile head allows to adjust the level of the structure being supported. Pile Foundation Detail Google Search Concrete Footings Concrete Deck Concrete Wall Panels The first is the wood chips shield the snow. . If the monitoring equipment on the pile head picks up that the travel time for the compression wave is less than that expected this can be an indication that defects exist in the pile shaft and further investigation and repair is required. In conclusion the differences between epoxy grout and non-shrink cementitious grout are summarised as. Download Features Description Sheet PDF Users Manual PDF Development History Buy Now. LPILE - Ensoft Inc. Wood chips being layered onto the snow pile. The performance index is defined as the ratio of dissipated energy to the maximum pile head displace