| 摘要 |
<p>PURPOSE:To improve safety by forming tow roofs on the ground, in which the joints of beams are faced with each other, erecting the roofs so as to be drawn to each other to erect a frame work and lifting it to the upper part of a building to fix it thereto. CONSTITUTION:Beams 5 of a roof 10 of one side are spaced at specified beam intervals R and main house members 6 are attached to the beams 5 in the direction normal thereto, and plates 7 and roof materials 8 are fixed thereto in succession. Thereafter the same procedure is applied to the roof 10 on the other side, after which wires are connected to hangers 11, 11 to lift the roofs 10, 10 in such a manner that both the roofs are drawn to each other and connections 5b, 5b are coupled together to build a frame work as a whole. The frame work 22 is lifted and secured to the base 4 on the upper part 3 of a building 2. As a result, safety and work efficiency can be improved.</p> |
