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Fixed nodes. This figure shows a computer-generated illustration of a post. The bottom half of the post is colored a light green. A small section just above bottom half is colored red and the remaining top quarter of the post is colored a dark purple and shows an arrow pointing into the right hand side of the structure with a label that reads Applied Velocity. A not to the left-hand side of the structure and beneath the structure both read No X or Z displacement.
Rigid walls. This figure shows a computer-generated illustration of a post. The post itself is colored a dark red. A small section near the top of the post is colored purple and shows an eyehook protruding from the left-hand side. Two green sleeves are also shown running up either side of the post for half of the structure's length
Full support structure. This figure shows a computer-generated illustration of a post. The post itself is colored a dark red. A small section near the top of the post is colored purple and shows an eyehook protruding from the left-hand side. The post is shown inserted in a metal brace, which runs up either side of the structure and shows three crossbars holding the brace in place. The brace itself is colored a dark green.
FHWA-HRT-05-096
