Wall-to-Beam Conversion in Brick-Concrete Prefabricated Panel Houses

Converting the load-bearing walls to reinforced concrete beams in brick-concrete prefabricated panel houses involves replacing the original load-bearing walls with reinforced concrete beams, a modification that requires strict adherence to technical specifications and approval processes to avoid potential structural safety hazards.

I. Core Conversion Principles
The essence of wall-to-beam conversion is to replace the original load-bearing walls with reinforced concrete beams, altering the vertical load transfer path of the house. The self-weight (dead load) and usage load (live load) borne by the original load-bearing walls must be precisely calculated and transferred to the new beams to ensure the stability of the structural load-bearing system after conversion. The cross-sectional dimensions, reinforcement quantity, and concrete strength grade (usually not lower than C30) of the new beams must be determined based on load calculation results, and the design unit must issue reinforcement drawings specifying construction parameters.

II. Key Construction Procedures

1. Feasibility Assessment and Approval

   • Architectural or structural professionals must assess the feasibility of wall-to-beam conversion, verifying through rigorous structural calculations whether the load-bearing capacity, deformation, and seismic performance of the structure after conversion meet regulatory requirements.
   • The conversion plan must be approved by relevant authorities; unauthorized construction is illegal.

2. Temporary Support System Setup

   • Before removing the original walls, steel or wooden supports must be installed on both sides, with support spacing determined based on beam span and load calculations to ensure that the upper loads are transferred to the foundation through the supports, preventing structural instability during removal.

3. Wall Removal and Debris Cleanup

   • Professional personnel must remove the walls in sections to avoid sudden stress changes that could cause collapse from one-time removal. During removal, construction debris must be promptly cleared to prevent clutter from affecting subsequent construction safety.

4. Beam Construction and Concrete Pouring

   • Install beam bottom formwork and reinforcement cages, and pour concrete in layers through pouring holes. The concrete must meet strength requirements, and the pH value of the mixing water must not be lower than 4 to prevent reinforcement corrosion. Pouring should stop when the pouring holes emit slurry to ensure concrete density.

III. Potential Risks and Prevention

• Structural Damage Risk: Improper operation may lead to insufficient beam load-bearing capacity, wall cracking, or overall house collapse.
• Reduced Seismic Performance: Conversion may damage the original structural integrity, reducing seismic capacity, which must be compensated for through reinforcement measures (such as adding structural columns).
• Legal Risks: Unauthorized conversion may result in fines or mandatory restoration to the original state.

IV. Professional Recommendations
Conversion must be entrusted to qualified professional civil construction teams; non-professionals are strictly prohibited from operating. Before construction, the original house design drawings must be thoroughly reviewed to confirm whether the walls are load-bearing structures, and construction must strictly follow the reinforcement drawings to ensure structural safety after conversion.