Method of dismantling framework structures |
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| 申请号 | US3793702D | 申请日 | 1972-04-20 | 公开(公告)号 | US3793702A | 公开(公告)日 | 1974-02-26 |
| 申请人 | AHLGREN N; | 发明人 | AHLGREN N; | ||||
| 摘要 | In the erection of bridges and other constructions of considerable horizontal length, special framework structures or scaffoldings are used for supporting the shuttering and similar framework for the construction, said framework structures also comprising vertical structures. For dismantling these structures, the vertical structures are mounted on the building construction by means of jacks, whereupon the lowermost parts of the structures are dismantled at ground level. The vertical structures are then successively lowered to be successively dismantled at ground level. | ||||||
| 权利要求 | 1. A method of dismantling auxiliary structures used during the erection of a primary structure which comprises the steps of connecting the auxiliary structure to the primary structure for overhead support thereby, lowering the auxiliary structure from the primary structure while connected thereto and supported thereby to present portions of the auxiliary structure for access within a limited elevation range above a ground reference level, and dismantling those portions of the auxiliary structure presented within said limited elevation range. 2. A method according to claim 1 wherein the auxiliary structure has a horizontal section that extends horizontally about the primary structure within a limited elevation span located a predetermined height above said ground reference level, and a vertical section that extends downwardly to said ground reference level, and including the steps of connecting said horizontal section and said vertical section to the primary structure for independent overhead support thereby, lowering one of said horizontal and Vertical sections at a time to present portions thereof within said limited elevation range, and progressively dismantling those portions of the auxiliary structure section thereby presented within said limited elevation range. 3. A method according to claim 1 wherein the auxiliary structure has a horizontal section that extends horizontally about the primary structure within a limited elevation span located a predetermined height above said ground reference level, and a vertical section that extends downwardly to said ground reference level, and including the steps of connecting said horizontal section and said vertical section to the primary structure for independent overhead support thereby and lowering said horizontal and vertical sections in unison from the primary structure while connected thereto and supported thereby. |
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