Dry hanging method There are several types of dry hanging of stone, such as steel pin type, through groove type, short groove type and back bolt type. The common ones are short groove type and back bolt type. The suspension method is relatively short groove type. The cost is lower but the safety is not as good as the back bolt type. It is usually used when the weight of the stone is not too big or the safety factor is not too high. The back bolt type is stable and stable, but the cost is high. It is used for larger stone (thickness 30) When the stone area is larger than 1.5m2 when mm) or when the stone safety performance is high. Stone selection For the deepening design, it should cooperate with the work of the design unit and the construction party. According to the design requirements of the design of the curtain wall and the color of the building, the construction party will be provided with various stone samples to help them determine the stone used as soon as possible. Generally, in the selection of several kinds of stone materials, the technical characteristics of the surface features, colors and textures of the stone to be used should be considered according to the stone materials. Although the stone supplier has given the physical properties of the stone, the physical properties of the stone as a natural material vary greatly, so it must be reconfirmed in order to establish the corresponding design indicators for the stone design. Construction design The basis of the dry hanging stone construction drawing design is: the building plan, the elevation plan, the node large sample drawing, the related drawings and other requirements and the calculation book of the dry hanging stone that other professional needs to cooperate with the dry hanging stone. The construction drawing design must meet the requirements of the architect and be consistent with the actual situation on the site. The construction drawing design mainly includes the installation of the stone surface design, the stone node large sample design, the stone processing detailed design, etc. . 1. Installation of the elevation plan design: According to the requirements of the plate division of the building elevation plan, the stones of different shapes or different sizes are separately numbered on each façade, and the number should be unique and convenient, and the designed stone is installed. The surface should be cleaned to express all the different types of stone panels on each façade. If the shape of the project is more complicated, in order to find the drawings of the dry hanging stone façade, it is also necessary to design the position index map of the dry slab stone installation elevation map, which clearly shows the façade façade number corresponding to each wall of the building. Figure number. 2, stone node large sample design: for the corners, windows, eaves, and other complex parts of the shape, size and connection of the stone, should be separately designed dry stone node large sample to show the actual physical stone parts Happening. 3, stone processing detailed design: stone installation elevation map and node large sample map approved by the architect, you can press the stone size on the stone installation elevation map and the details of the node large sample processing details design The detail is the so-called stone processing list. In determining the specific shape and processing dimensions of dry-hanging stone, it is necessary to repeatedly verify to ensure that everything is safe (especially when using more expensive imported stone) to avoid huge economic losses. Field force performance test After all, the theoretical calculation model of dry hanging stone is different from the actual actual force situation on the spot. In order to verify the accuracy of the theoretical calculation results, the stone must be fixed at the construction site according to the fixed system of dry hanging stone to be used, and then gradually Apply the load specified by the design and observe the overall force performance of the record. Finally, the mechanical calculation results are analyzed and studied according to the test to ensure that the dry hanging stone has a considerable degree of safety during the actual use. Stone physical property test When setting up design indicators for the stone of an engineering project, it is necessary to take samples that represent the stone used, or to select samples directly from the stone to be used in the building. The physical properties of dry-hanging stone mainly include bending strength, modulus of rupture, compressive strength, water absorption and bulk density. 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