Steel structure is widely used now. This kind of material has the means of pre assembly before the implementation of manufacturing. This method is to find out the fallacy, excessive error, deformation in the manufacturing process and the shortcomings of construction. In order to take measures to improve, the following article for you to introduce this kind of pre assembly in detail, let's get to know it together.
For example, the span of single-layer gabled workshop is generally large, which is better than that of a carrier unit, and the steel beam is generally variable cross-section. In this way, the central section of variable cross-section will be segmented, and the end plate connection will be adopted at the site of segmented position. If the hardness between the end plate and the component is not well controlled in the process of processing, it will form that the upper flange of the steel beam is not in a straight line, which will cause uneven roof slab in the future and bring potential water seepage. The steel structure can detect this achievement in time after pre assembly.
The key points of pre assembly review are simply to produce results, the gauge and size of steel beam, column and assembled frame; the hardness of connecting plate; the deviation of bolt hole position; the excessive riveting deformation of web and flange; the parts where the bolt can not be locked; the parts that are not easy to be riveted on site.
Pre assembly of steel structure: the steel members such as large-span columns, beams, trusses, supports and multi-layer steel frame structures, especially the heavy-duty steel structures connected by high-strength bolts, the steel shell structures built and supplied by blocks, etc., will be temporarily disassembled in the production line in whole or in sections and layers. Pre assembly is an effective measure to master the quality and ensure the successful construction of components on site.
Due to the lack of on-site installation experience of designers, the insufficient position of high-strength bolt sleeve will emerge at the time of design node, so that it can not be locked, or it is allowed that the high-strength bolt of torsional shear type can not be locked. This can also be detected and rectified in time during pre assembly to prevent taking the trouble back to the construction site.