Renovation of Prefabricated Panel Houses Built in the 1990s

Renovation of prefabricated panel houses built in the 1990s is feasible, and there have been multiple successful cases.

I. Renovation Methods

1. Wall Removal and Beam Reinforcement: Given the structural characteristics of prefabricated panel houses, wall removal and beam reinforcement can be employed for reinforcement. During the specific operation, temporary supports should be installed on both sides of the wall to ensure construction safety. Then, holes should be chiseled at the positions of the main beams to prepare for subsequent operations such as formwork installation. This method can effectively enhance the structural stability of the house and address issues such as limited load-bearing capacity of the floor slabs. For example, in the renovation of a 48㎡ prefabricated panel house in the family compound of Chongqing Technology and Business University, this method, combined with a log-style design, resolved issues such as floor slab load-bearing, complex wall base treatment, and unreasonable layout, giving the house a completely new look.
2. Overall Structural Reinforcement and Conversion to a Frame Structure: For areas where random demolition and new construction are not allowed, such as a three-story prefabricated panel building from the 1990s in Xiantao, Hubei, the option of overall structural reinforcement and conversion to a frame structure can be chosen. This requires the maintenance of the main beams and columns of the house to enhance the overall structural strength and improve the safety of the house.

II. Renovation Precautions

1. Enhancement of Seismic Performance: Houses built before the 1990s may have insufficient seismic performance due to the lack of seismic design codes at that time. During renovation, in addition to addressing existing living issues, consideration should also be given to enhancing seismic capacity. This can be achieved by adding seismic components, optimizing the structural layout, and other means to improve the seismic performance of the house and ensure living safety.
2. Professional Design and Construction: Renovation of prefabricated panel houses involves structural safety and requires design by professional designers to ensure that the renovation plan is scientific and reasonable. At the same time, the construction process should strictly comply with relevant codes to ensure construction quality.
3. Compliance Review: Before renovation, it is necessary to understand local policies and regulations to ensure that the renovation plan complies with the provisions. For areas where demolition and new construction are not allowed, compliant renovation methods should be chosen to avoid illegal and non-compliant behavior.