Doing so may cause serious cracking of the concrete. Reshores must not be placed where they could cause tensile stresses where there is no reinforcement. Reshores should be located in the same position on each floor so that they will be continuous from floor to floor. Do not set wedges with a sledgehammer, as this would remove the normal deflection from the slab above. The reshore is simply a strut and should be wedged only firmly enough to hold it in place. Reshores are provided to distribute any further applied loads among several slabs that are stronger (older), thereby helping to maximize the reuse of the formwork.When placing reshores, one must be sure not to remove the normal deflection of the floor above. When the original shores and formwork are removed, the slab or beam is required to support its own weight and any other loads that may have been applied. The original shores must be installed plumb and wedged securely so that each carries its share of load. Backshoring: Shores placed snugly under a stripped concrete slab or structural member after the original formwork and shores have been removed from a small area without allowing the slab to deflect or support its own weight or existing construction loads from above. Reshoring: Shores placed snugly under a stripped concrete slab or structural member after original formwork and shores have been removed from a large area, thus requiring the new slab or member to deflect and support its own weight and existing construction loads prior to the installation of reshores. Shoring: System of vertical or inclined supports for forms may be wood or metal posts, scaffold-type frames, or various patented members. We'll preface the discussion by first using the definitions from an unpublished report of the American Concrete Institute's formwork committee. What's the difference between the two methods?Īnswer: Peter Courtois, former chairman of American Concrete Institute Committee 347, Formwork for Concrete, gave us the following response. Question: We have heard the expressions reshoring and backshoring used quite often.
0 kommentar(er)
