| 摘要 |
A bracing element comprises a pair of metal members 1A' and 1A'' which have respective cross-sectional shapes which approximate one another and which enable one member 1A' to be retained and accommodated in a slidable nested relationship with the other member 1A'' so that relative movement of the members 1A' and 1A'' can telescope the members so as to extend the overall length of the bracing element. In another embodiment the inner of the two members has part of its cross-sectional shape compressed so that the compressed portion can be slidably accommodated within the uncompressed cross-sectional shape of the outer of the two members.
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