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Without perpendicular erosion. This diagram shows a rectangular column broken into columns and rows of individual squares. The top three quarters of this structure are colored a dull pink with the exception of a small band near the top, which is colored a dark purple and shows an eye hook emerging from the right hand side. The last quarter of this structure is colored a dark red. A gap exists in this red section. The top three quarters of the structure is tilted to the right, creating said gap, where five squares of one particular row is missing from the structure.
With perpendicular erosion. This diagram shows a rectangular column broken into columns and rows of individual squares. The top three quarters of this structure are colored a dull pink with the exception of a small band near the top, which is colored a dark purple and shows an eye hook emerging from the right hand side. The last quarter of this structure is colored a dark red. A gap exists in this red section. The top three quarters of the structure is tilted to the right, creating said gap, where five squares of one particular row is missing from the structure. There are also two squares missing, one on top of the other from the fourth column adjoined with the missing row of five.
Fringes of damage. This diagram shows a rectangular column. The column is void of color to enhance the actual points of damage. The top three-quarters of the structure is tilting to the right, creating a gap of five missing squares in one row near the last quarter of the structure. In that missing row, the next square, which is present is colored a dark red. The second square in the next row down is colored a light blue. Three squares in the third column are colored a dark blue, just below the gap and three squares in the next column are colored a dark red.
FHWA-HRT-05-096
