In the city's construction, the general will be applied to the Qingyuan steel structure of this material, although it's a lot of advantages, but it also has shortcomings, after many years of our business summed up a few points:
        The steel itself has some problems, which is a common shortcomings on the grounds that the use of parts of the particularity of the components in the component as a web used in the vertical direction up and down welding parts in the form of welding open the whole Penetration of the plate by the force of the groove, due to the existence of stratification board, welding welding stress generated by the release of the plate along the thickness of the tearing of the plate.
        That's how to deal with it? 1, a large number of steel within the sandwich belongs to the steel mill itself in the rolling process of quality problems, has exceeded the national standard requirements, you can ask the steel sent to verify with the steel mills in consultation with the return or replacement . 2, if the number of dissection can seek the views of the technical department and the owners, the information back to the steel plant, to take on the problems of construction remedial measures, according to the results of non-destructive testing in the problematic parts of the gouging all planing , After its own depth, and then filled with the same strength of welding materials, after the completion of the surface treatment, NDT after a specified time in the detection, while the same physical and chemical components sampling test to meet the design specifications can continue to use.
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