| 摘要 |
To solve the technical problem of simplifying the making and laying of mixed reinforced concrete floors with a saving in interposed brick elements, a composite joist is provided which consists of a profiled tube of rectangular section (1) provided with internal diagonally-positioned stiffening elements (2), and of a leaktight joint which is also profiled with a rectangular section (3), fixing means being provided for joining the profiled tube (1) to the joint (3), the said profiled tube (1) and the said joint (3) consisting of a drawn plastic material. <IMAGE> |
