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This figure shows four separate images.
The first image shows a computer-generated illustration of a wooden post embedded into neoprene lined concrete base. The post is colored blue in this illustration and the base is colored red. The impact vehicle is shown just making contact with the post. No damage is visible as of yet. The time recorded on this image reads Time equals 0.
The second image shows the wooden post splitting at the point in which it is embedded in the concrete base. The break appears clean as the post leans at a rough twenty-five degree angle to the right, with the impact vehicle in direct contact with the left-hand side of the structure. The time recorded on this image reads time equals 29.999.
The third image shows the wooden splitting further, the break appearing slightly jagged near the back of the back as the post leans at a rough forty-five degree angle, with the impact vehicle still in contact with the left-hand side of the structure. The time recorded on this image reads Time equals 49.997.
The fourth image shows a computer-generated close-up illustration of the wooden post at the point in which it is embedded into the concrete base. The image shows the gap, appearing to be a clean break as the post leans to the right. The edge of the concrete however, appears to be digging into the right hand side of the structure as it leans.
FHWA-HRT-05-096
