Office Chair Load-Bearing Broken

When the load-bearing part of an office chair breaks, targeted repair measures should be taken according to the fracture situation, and the cause of the fracture should be investigated and preventive measures should be taken.

I. Fracture Cause Analysis

The load-bearing fracture of an office chair is usually caused by the following factors:

1. Material Issues: The use of inferior materials (such as metal with overly thin tube walls or low-density plastics) or aged materials (such as wood that has been exposed to moisture for a long time or a fatigued gas spring) can result in insufficient chair strength, making it prone to cracking, deformation, or brittle fracture after long-term use.
2. Structural Defects: Unreasonable design (such as stress concentration at the connection points of load-bearing components) or long-term repeated stress (such as frequent lifting and lowering or shaking) can lead to structural fatigue and may trigger fractures.
3. Improper Use: Exceeding the product's designed load-bearing limit (such as an overweight person using an ordinary office chair) or long-term uneven stress (such as leaning on one side or shifting the center of gravity) can accelerate component damage.

II. Repair Measures

Choose a repair method according to the type of fracture:

1. Separation of Chair Legs and Base:
   • Clean the dust on the fracture surface, apply wood glue for bonding, and use clamps to fix it until the glue is completely cured.
   • If the connection is loose, reinforce it with wooden pegs or screws to ensure a tight contact surface.
   • After repair, apply a paint layer consistent with the original chair to cover up the repair marks.
2. Fracture of the Chair Body:
   • Remove the burrs at the fracture site, bond the two wooden boards with wood glue, and press them tightly with clamps.
   • Nail wooden strips or metal brackets on both sides of the bonded area for reinforcement to prevent secondary fractures.
   • Sand the repaired surface with sandpaper and apply paint to restore the appearance.
3. Replacement of Damaged Components:
   • Fracture of the Five-Star Base: If only the casters are damaged, use a screwdriver to remove the old casters and install matching new ones; if the entire five-star base is fractured, remove the old base (usually requiring a wrench to loosen the fixing screws) and purchase and install a new base of the same model.
   • Bursting of the Gas Spring: Stop using it immediately and contact a professional to replace it with a gas spring that meets safety standards (confirm that the load-bearing grade matches the chair).

III. Preventive Measures

1. Purchase High-Quality Products: Give priority to chairs that have passed international safety certifications such as BIFMA, and confirm the materials (such as thickened steel pipes and high-density sponges) and load-bearing design (such as a widened base and reinforcing rib structure).
2. Avoid Overloading: When the weight exceeds the chair's stated load-bearing capacity (usually 100-150 kg), replace it with a heavy-duty office chair.
3. Regular Maintenance: Check the screws and connectors for looseness every month, apply anti-rust oil to metal components every six months, and repaint wooden components to prevent moisture.
4. Standardize Usage Habits: Avoid leaning on one side for a long time, shaking violently, or standing on the chair to reduce stress from non-designed uses.