| 摘要 |
An impact redirecting structure (7) at one end of a floor structure (6) has a force receiving surface portion longitudinally spaced from that end. The impact redirecting structure (7) includes a structural portion (8) that normally maintains the force receiving surface portion in a predetermined position. When the force receiving surface portion is subjected to a sufficiently great force, this force causes the structural portion (8) to displace the force receiving surface portion to a position where there is a reduction in the magnitude of the moment produced by the force about a point near the end of the floor structure (6). <IMAGE>
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