| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce construction cost and improve working efficiency by forming ladders integrally with a tower-like structure, forming a floor which is to be the working deck inside the tower-like structure, and forming doors on a side of the tower-like structure. SOLUTION: Ladders 3 comprising a large number of lateral members is formed integrally on a side of a tower-like structure with a constant pitch with the tower-like structure. A door 4 is formed on the side of the tower-like structure in a plurality of places adjacent to a ladder 3, and the doors 4 provided with a handle 6 are formed in pairs to the left and to the right so that the doors are freely openable. In addition, a working deck 5 with plate materials which becomes a secured a floor face is formed on the horizontal structural members located at the lower end of the doors 4, and a space 7 required for workers to climb up and down a ladder 3 is formed between the working deck 5 and the ladder 3. As a result, the need for temporality building a scaffold for cable installation work is eliminated, which leads to reduction in construction cost and improvement in working efficiency.</p> |
