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This figure shows a computer-generated illustration of a post embedded in a concrete brace using the double neoprene flaps. The majority of the post is colored yellow, with a small section near the top colored red, representing the impact point and a small section at mid-point on the post representing the breaking area. This latter area is also the area in which the post is embedded into the concrete base. This first figure shows the impact vehicle making contact with the post, though no damage has as of yet occurred.
This figure shows the top half of the post leaning to the right hand side as a small gap forms in the red “breaking section” section of the post from the resulting impact. The top half leans at a rough ten-degree angle from its original position.
This figure shows the post leaning at the same as previously mentioned. The small gap still exists, its position found just beneath the level in which the neoprene sleeve exits the concrete brace. A large section of the post has disintegrated, beginning in the red “breaking area” section and running up to a point just below the impact area. The disintegration has cause a large chunk to be missing from the post, nearly the width of the structure.
This figure shows what remains of the post. Only a fraction of the post remains up near the impact area, literally just scattering of the structure remain. The post remains fully intact below the embedded area, but the rest of the post has evaporated.
FHWA-HRT-05-096
