| 摘要 |
Each pale (10) of palisade fencing has a concave cross-section to face the rails (11) and clamp-plates (13) each have hooked ends (14) to engage slots (12) in the sides of a pale from within, the ends (14) hooking over towards the intersected rail, which has a hole (16) for a security fastener (17, 18) which is capable of pulling the respective clamp-plate (13) towards the rail and causing the hooked ends (14) acting on the slots (12) to pull the edges (19) of the pale tight against the rail. Thus sideways removal of the pales (10) from the clamp-plates (13) is prevented, and the cross-sectional shape of the pales affords them great strength against levering attack as well as concealing the security fasteners (17, 18). |
