| 摘要 |
<p>The reinforced concrete floor support trellis consists of a series of frame elements connected by iron rods. Each frame element is formed of a rod which is bent to define a trapezium which is open at the bottom of an almost vertical side. These elements are coupled by two rods, one being positioned adjacent the opening formed by the rod ends. The other rod is positioned at the middle of the shorter parallel side of the trapezium. The second coupling rod pref. has a greater dia. than the first.</p> |
