Changes

===Structural Soil Medium===

===Structural Soil Medium===

Structural soil is an engineered soil medium that can be compacted to support sidewalk or roadway pavement installation requirements while also permitting tree root growth. Structural soil medium filled trenches are installed adjacent to tree pits to provide room for tree roots to spread out under the supported pavement portion of the tree trench.

Structural soil is an engineered soil medium that can be compacted to support sidewalk or roadway pavement installation requirements while also permitting tree root growth. Structural soil medium filled trenches are installed adjacent to tree pits to provide room for tree roots to spread out under the supported pavement portion of the tree trench.  The available soil for root growth ranges from 25 to 33% depending on the stone size.  Larger stone sizes will typically allow for greater soil volume.

===Structural Concrete Panels===

===Structural Concrete Panels===