| 摘要 |
A road safety barrier ( 1 ) comprises a series of beam sections ( 2 a to 2 d) together forming a length of barrier and supported above the ground by way of posts ( 3 a to 3 g). The positions of successive posts along at least part of the length of the barrier shift relative to the centres of the beam sections (C). The shift may be progressive but uniform along a section thereof so that the flexibility of the barrier is substantially constant. Shifting the locations of the posts along the length of the barrier by an increasing or decreasing amount has the effect of increasing or decreasing the strength of the barrier so that different road conditions can be accommodated even though beam sections of constant length are used to construct the barrier.
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