| 摘要 |
<p>The system is used for subsequently anchoring steel components, set on concrete slabs, individual or strip foundations, retaining walls, or similar, built into the concrete. It is esp. used for fixing guardrails and noise screen walls in bridge and road building. A number of screwing units are held at predetermined intervals apart by spacer pieces (7). Each unit comprises a covered or sheathed metal screw unit (4), and a metal disc (3), laid on this, for tension distribution, on the bottom edge of a tube (2), or similar, serving as screw guide. Forces are conveyed into the concrete, dimensional tolerances are reduced, and resilience under jolting is provided.</p> |
