Construction Plan for Fire-Resistant Prefabricated Houses

The construction plan for fire-resistant prefabricated houses (such as light steel houses) should be systematically implemented in accordance with fire-resistant material and structural safety requirements, following the steps below:

I. Foundation Construction and Site Preparation

1. Site Preparation: Clear surface debris to ensure uniform foundation bearing capacity. For soft soil foundations, replacement or compaction is required, with a compaction degree of ≥95%.
2. Foundation Pouring: Use strip or independent foundations with a concrete grade of ≥C20. The depth should be adjusted according to the frost line (0.8-1.2 meters in the north and ≥0.5 meters in the south). The horizontal deviation of anchor bolts should be ≤±2mm.
3. Damp-Proof Layer: Lay SBS modified bitumen waterproofing membrane on the top surface of the foundation to prevent moisture erosion.

II. Main Frame Construction

1. Light Steel Studs: Use C/U-shaped cold-formed thin-walled steel sections (thickness 1.0-2.0mm, zinc coating ≥275g/m²). Nodes should be fixed with self-tapping screws or bolts, with a spacing of ≤300mm.
2. Wall and Roof Truss Installation: First, install wall studs (vertical deviation ≤3mm/m), then install roof trusses (camber height is 1/200 of the span), and calibrate with a level and theodolite.
3. Reinforcement Measures: Add double studs at door and window openings and 45° diagonal braces at wall corners to enhance lateral resistance.

III. Installation of Fire-Resistant and Flame-Retardant Materials

1. Exterior Wall Fire Protection: Lay a damp-proof breathable membrane (durability ≥10 years) at the base layer and install Class A fire-resistant rock wool boards (density ≥100kg/m³, thickness ≥50mm) on the exterior. The spacing between anchor bolts should be 600mm×600mm.
2. Interior Wall Sealing: Fill the spaces between studs with Class A rock wool or glass wool and cover with fire-resistant gypsum boards (thickness ≥12mm, fire resistance limit ≥0.5 hours). Joints should be treated with joint compound and fiberglass mesh tape.
3. Roof Fire Protection: Lay fire-resistant aluminum foil composite membrane under the roof panels and then install fire-resistant gypsum boards or calcium silicate boards (thickness ≥9mm).

IV. Pre-embedding of Water and Electricity Pipelines

1. Pipeline Drilling: Use a dedicated hole opener (hole diameter ≤1/3 of the stud width) to avoid weakening the structure. Electric wire conduits should be made of flame-retardant PVC pipes (oxygen index ≥32%), and water pipes should be made of PPR pipes (pressure resistance ≥1.6MPa).
2. Junction Box Sealing: Seal all junction boxes with fire-resistant sealant, and maintain a spacing of >300mm between strong and weak electricity pipelines.

V. Installation of Doors, Windows, and Exterior Wall Finishes

1. Door and Window Installation: Use broken bridge aluminum alloy doors and windows (thermal conductivity ≤2.0W/(m²·K)), and fill the gaps in the door frames with polyurethane foam.
2. Exterior Wall Decoration: Metal carved panels (aluminum-zinc steel plate thickness ≥0.4mm) can be hung or real stone paint can be sprayed. Before construction, lay steel wire mesh (mesh ≤25mm×25mm) on the rock wool layer.

VI. Supporting Fire Protection Facilities

1. System Installation: For complete residential projects, it is necessary to simultaneously install fire water ponds, sprinkler systems, alarm devices, and emergency lighting.
2. Material Acceptance: Ensure that fire-resistant coatings, fire doors, cables, etc., comply with national standards and are free from damage and aging.

VII. Construction Management and Safety

1. Quality Control: Strictly follow the "Code for Fire Protection Design of Buildings" (GB50016), regularly train construction personnel, and strengthen the management of on-site fire protection facilities.
2. Safety Inspection: Implement a safety production responsibility system, focus on inspecting temporary electricity use, hot work operations, and other links to eliminate hidden dangers.

Note: This plan integrates the fire protection construction process for light steel houses and general fire protection requirements and can be adjusted in detail according to the project type (such as independent light steel houses or high-rise residential buildings).