| 摘要 |
<p>PROBLEM TO BE SOLVED: To realize the use with a simple crane, and improve the execution workability. SOLUTION: A crane to elevator/lower a suspension device body 10 is provided, and a suspender body 12a to increase/decrease the relative suspension length to fixing chains 13, 13 by the self weight of a roof member is provided on a chain block 12. After elevation in the sky, a space between eaves side end parts 4b, 4b of roof panels 4, 4 is expanded by feeding a load chain 12f from the chain block 12 provided on the suspension device body 10 through the remote operation from the lower side, and when the butt angleαof the roof panels 4, 4 of the roof member is agreed with the angle of a roof part of a building structural body, the feed of the load chain 12f from the chain block 12 is stopped.</p> |
