In building electromechanical engineering, seismic supports and hangers have begun to be used compulsorily, but many engineering friends are still relatively unfamiliar with this, because the design of buildings has basically not considered electromechanical seismic resistance, and seismic supports and hangers have never been used. But the situation is different now. The building electromechanical industry has a national standard in the field of seismic resistance, which clearly stipulates the setting and design of seismic support.

The following is a sort of anti-seismic support and hanger

　　· What is the basis for setting up seismic supports and hangers?

　　· What is seismic support and hanger?

　　· What are the common forms of seismic supports and hangers?

　　· Where are earthquake-resistant supports and hangers needed?

What is the basis for setting up seismic supports and hangers?

　　According to the national standard GB50981-2014 "Code for Seismic Design of Building Electrical and Mechanical Engineering" issued by the Ministry of Housing and Urban-Rural Development in 2015, it clearly stipulates the design and use of seismic supports and hangers. The standard has been implemented since August 1, 2015, which also means that since then, seismic supports and hangers must be considered for construction mechanical and electrical engineering.

　　What is seismic support and hanger?

　　 Seismic support and hanger is a support and hanger product used to support water pipes, air pipes, bridges and other electromechanical pipeline equipment and provide seismic support. According to GB50981-2014 "Code for Seismic Design of Building Mechanical and Electrical Engineering", the definition of seismic support and hanger is: the seismic support facility that is firmly connected to the building structure and takes seismic force as the main load. It is composed of anchors, reinforced booms, seismic connection members and seismic braces.

　　 What are the common forms of seismic supports and hangers?

　　According to GB50981-2014 "Code for Seismic Design of Building Electrical and Mechanical Engineering", seismic supports and hangers are composed of anchors, reinforced booms, seismic connection members and seismic braces. All components that make up the seismic support and hanger should be finished components, and the structure of the connecting fasteners should be easy to install.

　　 Lateral seismic hanger

　　 is used to resist the lateral horizontal seismic force.

　　 Longitudinal seismic hanger

　　 is used to resist the vertical horizontal seismic force.

　　 Single pipe (rod) seismic support and hanger

　　 is an earthquake-resistant support and hanger composed of a load-bearing hanger and an earthquake-resistant diagonal brace.

　　 Door type seismic support and hanger

　　 An earthquake-resistant support and hanger consisting of two or more load-bearing hangers, beams, and seismic braces.

　　 Where do you need to use seismic supports and hangers?

　　 According to GB50981-2014 "Code for Seismic Design of Building Mechanical and Electrical Engineering":

　　 Article 1.0.4 (Strong Article) stipulates that the electrical and mechanical engineering of buildings in areas where the seismic design intensity is 6 degrees and above must be subjected to seismic design.

　　 Article 3.1.6 stipulates the content of seismic fortification:

　　① Equipment with gravity greater than 1.8kN in the suspended pipeline;

　　② Domestic water supply and fire-fighting piping system above DN65;

　　③A duct system with a rectangular cross-sectional area greater than or equal to 0.38㎡ and a circular diameter greater than or equal to 0.7m;

　　④For electrical piping with an inner diameter greater than or equal to 60mm, and cable ladder frames, cable trough boxes, and busbars with a gravity greater than or equal to 150N/m.

　　 Article 3.1.8 stipulates that the pipes of the building electrical and mechanical engineering process passing through the seismic isolation layer shall be connected by flexible connection or other methods, and seismic supports shall be set on both sides of the seismic isolation layer.

　　 Article 4.1.2.1 stipulates that when the straight line length of the water supply and drainage risers of high-rise buildings in the 8 degree and 9 degree areas is greater than 50m, anti-vibration measures should be taken; when the straight line length is greater than 100m, anti-vibration measures should be taken.

　　 The indoor water supply, hot water and fire-fighting pipes whose diameter is greater than or equal to DN65 that need to be fortified in Article 4.1.2.3 shall be provided with seismic supports as required when they are fixed by hangers, brackets or brackets.

　　 Article 5.1.2.4 stipulates that the pipes in the boiler room, refrigerating machine room, and heat exchange station should have reliable lateral and longitudinal seismic supports. If multiple pipes share a support or hanger or a single pipe support and hanger with a pipe diameter greater than or equal to 300mm, a portal-type seismic support and hanger should be used.

　　Article 5.1.3.3 stipulates that the air ducts with a rectangular cross-sectional area greater than or equal to 0.38 square meters and a circular diameter greater than or equal to 0.70m may use seismic supports and hangers.

　　 Article 5.1.4 (Strong Article) stipulates that anti-fume exhaust ducts, accident ventilation ducts and related equipment should adopt seismic supports and hangers.

　　 Article 5.1.5.4 stipulates that air-conditioning units, fans and other equipment with a gravity greater than 1.8kN should not be installed by hoisting. When hoisting must be used, it should be avoided above the location of personnel activities and evacuation channels, but seismic supports and hangers should be installed.

　　Article 6.1.1 stipulates that gas pipelines with an inner diameter greater than or equal to 25mm shall be designed for earthquake resistance, and the installation of pipeline seismic supports and hangers shall comply with the regulations.

　　 Article 6.2.8 stipulates that in buildings with a building height greater than 50m, gas pipelines shall be provided with seismic supports at appropriate intervals according to the seismic requirements of the building.

　　Article 7.1.2 stipulates that electrical piping with an inner diameter of not less than 60mm and a cable ladder frame, cable trough box, and busway with a gravity not less than 150N/m shall be earthquake-resistant.

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