How to Demolish Prefabricated Panel Houses

The demolition of prefabricated panel houses should be carried out in a scientific and step-by-step manner, combining policy requirements and safety regulations. According to the 2026 policy, the demolition of prefabricated panel houses focuses on 'governance and renovation, with comprehensive demolition as a supplementary measure.' Only C and D-grade dilapidated houses (professionally assessed) can be included in the demolition scope, and they must meet restrictions such as 'not exceeding 20% of the total building area within the renewal unit' and 'a demolition-to-construction ratio of no more than 2.' Specific demolition steps and precautions are as follows:

I. Pre-Demolition Preparation

1. Develop a Detailed Plan: Consider the house structure (e.g., type of prefabricated panels, connection methods), surrounding environment (e.g., adjacent buildings, underground pipelines), and policy requirements to clarify the demolition sequence (e.g., top-down layer-by-layer demolition), required tools (e.g., electric hammers, cutting machines, cranes), and personnel assignments (e.g., cutting team, transportation team, safety supervision team).
2. Disconnect Structural Connections: Use electric hammers or gas cutting equipment to remove connecting steel bars, bolts, or welds between the prefabricated panels and beams, columns, and other structures, ensuring complete separation of the panels from the main structure to prevent damage to surrounding structures during demolition.
3. Safety Protection Measures: Designate a demolition work area, set up fences and warning signs; workers must wear safety helmets, dust masks, goggles, non-slip shoes, and cut-resistant gloves; provide first aid kits and firefighting equipment on-site, and arrange for dedicated safety supervision.

II. Demolition Implementation Phase

1. Cutting with Professional Tools: Use electric hammers or diamond cutting machines to segment the prefabricated panels, controlling the cutting depth (to avoid damaging underlying structures) and breaking large panels into smaller, manageable pieces (generally no larger than 0.5 square meters).
2. Control Demolition Force: Use cranes or manual hoists to lift the cut prefabricated panels, avoiding direct throwing; for panels tightly connected to walls, first loosen the surrounding filler (e.g., cement mortar) and then slowly lift them away to prevent wall collapse due to impact.
3. Dust Control: Continuously spray water to reduce dust during demolition or cover the work area with dust screens; promptly clean up debris from demolished areas to minimize dust accumulation.

III. Post-Demolition Handling

1. Waste Classification and Disposal: Recycle steel bars and metal parts from the prefabricated panel fragments; concrete blocks can be crushed and used for road sub-bases or landfill; classify and store waste wood and plastics separately for disposal by professional agencies to avoid environmental pollution.
2. Structural Safety Inspection: After demolition, conduct a comprehensive inspection of the remaining structures (e.g., beams, columns, walls) to confirm the absence of cracks, deformations, and other hazards; fill (using high-strength concrete) or reinforce (adding steel supports or carbon fiber sheets) demolished areas (e.g., floor openings).
3. Policy Compliance Verification: After demolition, submit an acceptance application to relevant departments to ensure that demolition scope, demolition-to-construction ratio, and other indicators comply with policy requirements, avoiding subsequent legal risks.