How to calculate the load bearing for ULPA ceiling installation? Brackets and frames prevent deformation

The load-bearing capacity of the ULPA filter ceiling installation should be calculated based on the weight of the filter element, brackets, fixed points and ceiling structure, and avoid the filter frame bearing a load exceeding the design. Load-bearing safety and sealing smoothness need to be met at the same time. Insufficient load-bearing will cause the outer frame to deflect under its own weight and compression force, and the deflection will cause uneven contact between the sealing surfaces, which will eventually manifest as local air leakage - load-bearing and sealing are two sides of the same thing. Aili Industrial's sheet metal processing capabilities cover ceiling brackets, box frames and connectors. The brackets and filter frames are matched in the same system, and the stress route can be checked from the ceiling structure to the filter frame at one time.

1. Clarify the weight and force-bearing route: Who bears the weight must be clearly stated

Check who bears the weight of the filter element, box and ancillary components, and check whether the boom, brackets and connectors comply with the project design.

The weight of the ULPA filter element itself is limited, but after adding the box, pressing parts and possible ancillary parts, the total load will increase significantly. When the force path is unclear, it is easy for part of the weight to fall on the filter frame instead of the bracket. Aili Industry isIn the design of the ceiling installation structure of the FFU fan filter unit , the loads borne by the box, bracket and boom will be clearly defined. The supporting ceiling bracket and filter frame are processed in the same sheet metal system, and the stress route can be checked at the drawing stage. The relationship between levels and filtering requirements can be found inISO cleanliness level comparison。

2. Prevent local compression and deflection: the middle of the long side is the weak point

The support position should match the frame structure to avoid unsupported long sides or concentrated stress on the corners. Excessive deformation will affect gasket contact and liquid tank fit.

If the long side of a large-sized filter element is only supported at both ends, the middle part will deflect under its own weight, and a gap will appear on the sealing surface. Aili Industry isIn the structural design of large-size non-standard ULPA filter models , the spacing between support points will be determined according to the stiffness of the frame, and intermediate supports or reinforcements will be added if necessary;The tank body of the liquid tank sealed ULPA filter is more sensitive to flatness, and the support layout needs to be checked separately. The relationship between sealing surface and deformation can be referred toHEPA FAQs and Selection Guide。

3. Both installation and maintenance need to be considered: the force will change during the replacement process.

Temporary lifting, disassembly sequence and personnel operations during the replacement process will also change the stress. After structural adjustment, the fixing and installation integrity should be reviewed.

The stress state during installation is different from that during replacement. When the bottom-detachable structure is disassembled, the weight of the filter element may be temporarily borne by the frame; the top-detachable structure requires access support above the ceiling. Aili Industry isthe detachable FFU indicates the exit direction of the filter element and the temporary support position, which facilitates on-site judgment on which parts can bear force during replacement. The box structure design of Please refer to the support conditions for internal installation of the equipment.EFU equipment side fan filter unit。

4. Additional components will introduce external loads from the original design

Additional fixing of cable brackets to the filter frame will introduce external loads to the original design, which should be re-evaluated rather than accepted by default. If lamps, sensors, and cable trays are fixed on the filter frame or FFU box, they will change the stress state.

Aili Industry isThe design of compact models such as ultra-thin FFU will reserve fixed positions for accessory components to avoid direct installation on the load-bearing parts of the filter frame or box on site. If the project requires adding components to the ceiling system, the loads can be checked at the design stage.

5. Related questions and answers

Can the load-bearing calculation only look at the weight of the filter element?
Other functions of the box, accessories and design provisions should also be considered, as confirmed by the project structure plan. Temporary lifting capacity during replacement also needs to be assessed.

What should I do if there is sagging in the middle of the long side?
The distance between support points and the stiffness of the frame should be checked first. If necessary, intermediate supports should be added or the structure should be strengthened. The deformation cannot be pressed back by increasing the pressing force.

Is it possible to fix the cable bracket to the filter frame?
The original design external loads will be introduced and should be re-evaluated. It is recommended to fix the accessory components on special brackets or ceiling structures.

6. Related articles

ULPA ultra-high efficiency filter FAQ and selection guide

Bottom-removable FFU | Bottom-replaceable fan filter unit

Liquid tank seal ULPA ultra high efficiency filter

FFU FAQ and technical support

7. Key points for selection and acceptance inspection

8. Product matching and technical support from Aili Industrial

Aili Industrial's sheet metal processing covers ceiling brackets, box frames and connectors. The brackets and filter frames are matched in the same system, and the stress route can be checked at one time during the drawing stage.The ceiling installation structure of the FFU fan filter unit clearly defines the load division of the box, bracket and boom.The detachable FFU indicates the exit direction of the filter element and the temporary support position.The ultra-thin FFU reserves fixed positions for accessory components.The large size model of non-standard ULPA filter determines the support point spacing according to the frame stiffness.liquid tank sealed ULPA filters can be checked individually. The tank flatness requirements of Provide process objectives, installation drawings, operating conditions and acceptance requirements for further communicationULPA ultra-high efficiency filters . Standard specifications, non-standard interfaces, samples and batch matching of The specific parameters and test range are based on the confirmed model and technical documents.