Definition of Seismic Supports
Building electromechanical seismic resistance refers to the seismic design of mechanical and electrical facilities such as pipes, air ducts, and cable trays. Before the national standard was issued, the protection of mechanical and electrical facilities relied on load-bearing support systems, which mainly served to bear loads and basically did not consider design, posing significant hidden dangers to system safety. The measures and technologies specified in the "Code for Seismic Design of Mechanical and Electrical Equipment in Buildings" are defined as seismic support systems; based on load mechanics, they firmly connect pipes, air ducts, cable trays, and other mechanical and electrical facilities to the building structure that has been seismically designed, limiting displacement of auxiliary mechanical and electrical engineering facilities, controlling facility vibration, and transferring loads to various components or devices on the load-bearing structure. The main purpose of seismic support is safety, that is, to minimize the loss of life and property caused by earthquakes. In layman's terms, this type of product is also called seismic bracing and hanger.
Development of Seismic Supports
After the 5.12 Wenchuan earthquake, the Ministry of Construction urgently revised the original GB50011-2001 "Code for Seismic Design of Buildings" twice and issued the new GB50981-2014 "Code for Seismic Design of Mechanical and Electrical Equipment in Buildings", requiring strict implementation of its mandatory provisions to achieve the basic spirit of the code: "No collapse in major earthquakes, repairable in moderate earthquakes, and no cracking in minor earthquakes", maximizing the protection of people's lives and property. Relevant institutions and experts also began to respond to national needs and started to formulate relevant standards to meet the practical needs of engineering electromechanical systems. On October 9, 2014, the Ministry of Housing and Urban-Rural Development officially issued the "Code for Seismic Design of Mechanical and Electrical Equipment in Buildings" as a national standard, numbered GB50981-2014, with mandatory implementation from August 1, 2015. The national standard comprehensively elaborates the basic requirements for seismic design measures, mainly applicable to mechanical and electrical engineering facilities such as building water supply and drainage, heating, ventilation and air conditioning, gas, thermal pipelines, electricity, communication, and fire protection. After seismic fortification, it reduces earthquake damage, prevents secondary disasters, and plays a safe and reliable role in reducing casualties and economic losses.
National Standards
In the face of natural earthquake disasters, what we can do is to minimize damage and losses. To this end, the state has put forward higher requirements for building seismic resistance. The national standard GB50981-2014 "Code for Seismic Design of Mechanical and Electrical Equipment in Buildings", implemented on August 1, 2015, is formulated to implement the "Building Law of the People's Republic of China" and the "Earthquake Prevention and Disaster Reduction Law of the People's Republic of China", implement the policy of focusing on prevention, and ensure that mechanical and electrical engineering facilities such as building water supply and drainage, heating, ventilation, air conditioning, gas, thermal, electrical communication, and fire protection, after seismic fortification, reduce earthquake damage, prevent secondary disasters, avoid casualties, reduce economic losses, and achieve safety, reliability, advanced technology, economic rationality, and convenient maintenance and management.
Mandatory Provisions of the National Standard:
In the national standard GB50981-2014 "Code for Seismic Design of Mechanical and Electrical Equipment in Buildings" implemented on August 1, 2015, Clauses 1.0.4, 5.1.4, and 7.4.6 are mandatory and must be strictly implemented. The mandatory provision in Clause 1.0.4 of the national "Code for Seismic Design of Mechanical and Electrical Equipment in Buildings" stipulates that "mechanical and electrical engineering in buildings in areas with seismic fortification intensity of 6 degrees or above must undergo seismic design"; the specific requirements for building mechanical and electrical specialties are as follows:
Water Supply and Drainage Specialty
For indoor water supply, hot water, and fire protection pipes with a diameter greater than or equal to DN65, when fixed with hangers, supports, or brackets, seismic supports should be installed.
HVAC Specialty
1. Pipes in boiler rooms, refrigeration rooms, and heat exchange stations should have reliable lateral and longitudinal seismic supports.
2. Air ducts with a rectangular cross-sectional area greater than or equal to 0.38㎡ and circular ducts with a diameter greater than or equal to 0.70m can use seismic bracing and hangers.
3. Smoke exhaust ducts, emergency ventilation ducts, and related equipment should use seismic bracing and hangers.
4. Equipment such as air conditioning units and fans with a weight greater than 1.8kN should not be installed by suspension; when suspension is necessary, they should be avoided above areas where people move and evacuate, and seismic bracing and hangers should be installed.
Gas
Gas pipes with an inner diameter greater than or equal to 25mm should undergo seismic design.
Electrical
1. Electrical conduits with an inner diameter not less than 60mm and cable trays, wire troughs, and busways with a weight not less than 150N/m should undergo seismic fortification.
2. Shared antennas installed on building roofs should adopt safety protection measures to prevent equipment or its components from falling and injuring people due to earthquakes.
Support Systems
Kangmeifeng Seismic Bracing and Hanger Design
GB50981-2014 "Code for Seismic Design of Mechanical and Electrical Equipment in Buildings" (hereinafter referred to as the "Code") specifies the seismic requirements for equipment specialties such as water supply and drainage, HVAC, gas, and electrical, and provides specific design methods for seismic bracing and hangers. For pipeline equipment with large weight or involving life safety, the "Code" requires seismic design and the use of seismic bracing and hangers.
Kangmeifeng Seismic Bracing and Hanger Design Process
1. Basic Design Requirements
Extract project information parameters according to the "Code" and industry standards.
Select specific project parameters according to the specific content of the tender documents.
Select seismic structural measures according to the design description of the original drawings.
2. Plan Layout for Seismic Design of Supports and Hangers
The spacing of seismic bracing and hangers for specialties such as ventilation, water, and electrical should be selected according to Table 8.2.3 of the "Code".
The spacing of comprehensive seismic supports and hangers should take the minimum value of the spacing of seismic supports and hangers for each specialty.
3. Detailed Drawings of Seismic Supports and Hangers
Select seismic supports and hangers according to the building structure type and pipeline loads.
Select products according to the Kangmeifeng seismic bracing and hanger system.
4. Layout of Supports and Hangers
The layout of supports and hangers should be determined according to Sections 8.2 and 8.3 of the "Code".
Product Systems
Channel Steel
Channel steel is a common structural material used in seismic supports and hangers. It provides strength and stability to the support system. Kangmeifeng offers various specifications of channel steel to meet different project requirements.
Pipe Clamps
Pipe clamps are used to secure pipes to the support structure. They are designed to accommodate different pipe sizes and materials, ensuring a secure and stable connection.
Connectors and Fittings
Connectors and fittings are essential components that join different parts of the seismic support system. They are designed to provide flexibility and ease of installation while maintaining structural integrity.
Seismic Bracing Components
Seismic bracing components include diagonal braces, lateral braces, and other elements that provide additional stability to the support system during seismic events. They are designed to absorb and dissipate seismic forces.
Installation Accessories
Installation accessories such as bolts, nuts, washers, and anchors are necessary for the proper installation of seismic supports and hangers. They ensure a secure and reliable connection to the building structure.
Quality and Standards
All Kangmeifeng seismic support and hanger products are manufactured in accordance with national standards and undergo strict quality control to ensure reliability and durability. They are designed to meet the requirements of GB50981-2014 and other relevant standards.
Applications
Kangmeifeng seismic supports and hangers are widely used in various building types, including commercial, residential, industrial, and public buildings. They are essential for ensuring the safety and stability of mechanical and electrical systems during earthquakes.
Customization
We offer customization services to meet specific project requirements. Our team can design and manufacture seismic supports and hangers tailored to your needs, ensuring optimal performance and safety.
Technical Support
Our technical team provides comprehensive support, including design consultation, installation guidance, and after-sales service. We are committed to helping you achieve the highest level of safety and compliance.
Contact Us
For more information about our seismic support and hanger products, please contact us. We look forward to serving you.
