| 摘要 |
<p>PURPOSE:To improve the transportation efficiency of the titled duct by a method wherein the duct which is in the shape of a square cylinder is made to be easily assembled in a construction site by providing four duct forming plates each having flanges on both sides thereof and four L-shaped angle members for connecting the adjacent duct forming plates, respectively. CONSTITUTION:The duct forming plate 1 provided with the flanges 2 on both sides thereof is further provided with a desired number of spaced apart projections 1b along both of the longitudinal sides 1a thereof and four of such plates are prepared to make one set for forming a unit duct in combination with the angle member 3 for connecting the adjacent plates of the set at the corners thereof. The angle member 3 is made in the shape of L in section and is provided with U-shaped receiving sections 3b which are formed continuous with the inner surfaces of both connecting sections 3a so as to extend outwardly along the lengths of the sections 3a. Further, engaging sections 3c for engaging the projections 1b of each of the duct forming plates 1 are provided inside the receiving sections 3b, respectively. Thus, with the above structure, the duct can be transported in a dissassembled condition to the site so that the transportation efficiency of the duct is improved.</p> |
