To provide a slide method that suppresses the horizontal force of a column base due to the weight of a rigid-frame structure.SOLUTION: Portal partial frames 4A to 4C of the first slide are assembled with both ends of a roof R in a pin-joined state, each part is fully tightened and jacked down in that state, a roof finish is attached, and then members are added to both ends of the roof R to make a rigid frame. A traction device 6 is installed, and the first sliding movement is made. Next, a new portal partial frame 4E is assembled with both ends of the roof R in the pin-joined state, and a roof member of the portal partial frame 4D that connects that to the slid portal partial frame 4C is assembled in the pin-joined state and jacked down in that state. After that, the roof finishes are attached to the portal partial frames 4D and 4E, and members are added to both ends of the roof R of the portal partial frame 4E to form a rigid frame. Then, the roof member of the portal partial frame 4D is fully tightened, and the entire integrated portal partial frame 4 is slid.SELECTED DRAWING: Figure 5
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