| 摘要 |
<p>A yieldable post assembly comprises a post support 2 and a post 1 frangibly coupled to the support by means of bolts 5 having a predetermined breaking stress. Thus the coupling will break upon application to the post of a force in excess of a value established by the predetermined breaking stress. The post assembly may alternatively incorporate mountings 13, 14 secured to the end regions of the post and frangibly coupled together by the bolts 5. <IMAGE></p> |
