| 摘要 |
<p>The framework is rectangular and consists of a bar bent into a rectangle with one partially open side. One edge of this side is hooked downwards (7), the angle between the hook and the vertical being greater than or equal to 135 deg., whilst the other edge is bent horizontally. The sides (6) opposite the open sides of each framework are linked together by at least two longitudinal bars and the gap (4) in the open side must be greater than the dia. of these bars. Modular elements of this form can be linked together to make the required reinforcing layout. The open side is then closed by pins (11) which consist of C-shaped bars (13) enclosing two longitudinal bars (12).</p> |
