Does a cleanroom need to be earthquake resistant?

Seismic resistance considerations are often overlooked during the design and construction of cleanrooms. However, with the frequency of earthquakes and the increase in extreme weather events, it is especially important to ensure the safety of cleanrooms and their equipment. In this paper, we will analyze the definition of A Clean Room, the seismic design of the building itself, the structural stress characteristics of a clean room and its performance in an earthquake.

I, what is the clean shed

Clean shed is a device used to control particulate contamination in a particular environment, its main function is to maintain the cleanliness of the air through high-efficiency filtration systems and airflow control technology, applicable to pharmaceutical, biotechnology, Semiconductor and other industries. Clean rooms are usually equipped with hepa or ULPA filters, which can effectively remove particles and microorganisms from the air, ensuring that products and processes are free of contamination. At the same time, the design of the clean room also needs to meet the specific cleanliness level requirements, in order to adapt to different production and experimental needs.

fema_p-232_september2024.pdf

II, the clean shed is located in the building itself is equipped with seismic design

The clean room is usually installed in the building with seismic design, especially in earthquake-prone areas, the building structure needs to comply with national and local seismic codes. The purpose of these codes is to ensure that the building can withstand a certain amount of vibration in the event of an earthquake and avoid structural damage or collapse. Therefore, the overall safety of a clean room is closely related to the seismic capacity of the building itself. Qualified seismic design can provide the necessary support for the clean shed to ensure that it remains stable in an earthquake.

III.Structural stress characteristics of clean shed

The structure of clean shed is usually composed of frame, shell and internal purification system, and its stress characteristics are mainly reflected in the following aspects:

• center of gravity position: the center of gravity of the clean shed is relatively low, the general height of the clean shed are within 3 meters, so the center of gravity is relatively low, when an earthquake occurs, there will not be a large shake.

• Material strength: clean shed materials are usually selected high-strength, vibration-resistant materials to improve its seismic capacity. For example, aluminum alloy and stainless steel and other materials in the seismic design of good performance.

• Connection: the connection between the components of the clean shed is also a key factor affecting the performance of the force. The use of reasonable connection design can effectively disperse the vibration pressure brought about by the earthquake, reduce the overall structure of the force concentration.

IV, the clean shed in the event of an earthquake, whether it will fall over

In the event of an earthquake, whether the clean shed will fall over depends mainly on its design, fixing method and the overall seismic capacity of the building. Generally speaking, if the design of the clean shed meets the seismic standards and is effectively fixed and reinforced inside the building, the risk of it tipping over will be significantly reduced. The following are a few considerations:

• Fixing measures: The clean room should be connected to the building structure through special fixing devices to ensure that it is not easy to move during an earthquake.

• Seismic design standards: If the building where the clean room is to be installed is designed and constructed in accordance with the relevant seismic design codes, the likelihood that it will remain stable under most common shaking conditions is high. 3.

• Seismic level: the seismic level of different regions varies, and the seismic capacity of the clean room needs to be designed and evaluated according to the specific seismic risk of the region.

the cleanroom seismic design should not be ignored. As the key equipment in the cleanroom, the safety and stability of the cleanroom has a direct impact on the operation efficiency and product quality of the whole cleanroom. Therefore, in the design and construction process of cleanroom shed, seismic factors should be fully considered to ensure its reliability and safety in extreme situations such as earthquakes. Through reasonable design and fixing measures, it can effectively reduce the risk of clean shed tipping and maintain the normal operation of the clean room.