In the construction of electrical and mechanical engineering, seismic supports and hangers have begun to be used compulsorily, but many engineering friends are also strange about this. Since the design of buildings will basically never consider the seismic resistance of electromechanical, seismic supports and hangers have disappeared. Used. But the situation is no longer like that 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 above is based on the following questions

Make a comb for the seismic support and hanger

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

· What is the seismic support and hanger?

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

· Where do you need to use seismic supports and hangers?

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

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

2. 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 Electrical and Mechanical Engineering", the definition of seismic support and hanger is: the seismic support facility that is firmly connected to the building structure and takes the seismic force as the main load. It is composed of anchors, reinforced booms, seismic connection members and seismic braces.

3. What are the common forms of seismic supports and hangers?

According to GB50981-2014 "Code for Seismic Design of Building Electrical and Mechanical Engineering", the seismic support and hanger are modified by 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 fastening fasteners should be easy to install.

4. Where are seismic supports and hangers needed?

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

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

Article 3.1.6 stipulates the content of seismic fortification: ①The equipment whose gravity is less than 1.8kN among the suspended pipelines; ②The domestic water supply and fire-fighting piping system exceeding DN65; ③The rectangular cross-sectional area is greater than or equal to 0.38㎡ and the circle A duct system with a 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 pipelines of the building electrical and mechanical engineering that pass through the seismic isolation layer shall be connected by flexible connections or other methods, and seismic supports shall be installed 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.

Article 4.1.2.3 stipulates that the indoor water supply, hot water and fire-fighting pipes that need to be fortified shall have horizontal pipes with a diameter greater than or equal to DN65. If they use hangers, brackets or brackets, seismic supports shall be provided as required.

Article 5.1.2.4 stipulates that the pipes in the boiler room, refrigerating machine room, and heat exchange station should have credible lateral and longitudinal seismic supports. A total of multiple pipe supports and hangers or a single pipe support and hanger with a pipe diameter greater than or equal to 300mm should be gate-shaped seismic supports and hangers.

Article 5.1.3.3 stipulates that the air ducts with rectangular cross-sectional area greater than or equal to 0.38m2 and 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 less than 1.8kN should not be installed by hoisting. If hoisting is necessary, it should be avoided below the location of personnel activities and evacuation routes, 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 whose highest point is 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 cable ladders, cable trough boxes, and busbars with a gravity of not less than 150N/m shall be earthquake-resistant.