Silt. Silt is granular material of a size somewhere between sand and clay whose mineral origin is quartz and feldspar. Silt may occur as a soil or as suspended sediment in a surface water body. It may also exist as soil deposited at the bottom of a water body.
In North America, a grade-separated junction may be referred to as a grade separation or as an interchange â in contrast with an intersection, at-grade, a diamond crossing or a level crossing, which are not grade-separated. 1 Effects.
CDX stands for: C = one side of the board is C grades, which is the average surface quality. D = the other side of the board is D grades, which might show some little holes X = stands for the type of glue used to hold the board together. In this case X stands for Exposure to Moisture (but NOT water or weather resistant!). As shown above, the grade determines the name of the plywood.