Changchun Prefabricated House Main Body

The main body of prefabricated houses in Changchun is primarily composed of light steel or steel structural frames, featuring high-strength corrosion resistance, thermal insulation and soundproofing, and resistance to wind, snow, and freeze-thaw cycles. It adopts standardized factory prefabrication and on-site assembly construction, with a service life of over 70 years.

Main Structural Materials and Types

The main structural frames of prefabricated houses in Changchun are primarily light steel keels or steel structural frames. Light steel houses utilize G550 high-strength aluminum-zinc-coated light steel keels that comply with national standards, offering excellent rust and corrosion resistance suitable for Changchun's winter climate characterized by heavy snow, strong winds, and significant temperature variations, with a structural service life exceeding 70 years. For example, the light steel house main bodies produced by Jilin Hongshengfa Color Steel Co., Ltd. use such materials, achieving a 'lifetime rust-free' guarantee. Prefabricated integrated houses, on the other hand, are mainly constructed with steel or concrete frames, integrating wall, roof, and piping systems. Through standardized design, factory production, and assembly construction, they enhance construction efficiency and quality.

Performance Characteristics

1. Thermal Insulation and Soundproofing: Houses employ thickened insulation layers and thermal break structural designs to block cold bridges, ensuring warmth in winter and coolness in summer. For instance, the light steel houses produced by Hongshengfa Company feature multiple layers of thermal insulation and soundproofing structures, providing indoor comfort far exceeding that of traditional houses and meeting the requirements of the 'Thermal Design Code for Civil Buildings'. Prefabricated houses in Changchun generally use high-performance insulation materials to ensure good thermal performance even at extreme temperatures of -30℃.
2. Waterproofing and Moisture Resistance: Roofs utilize multiple waterproofing techniques and double-layer anti-corrosion paint finishes, while walls employ high-density fire-resistant rock wool insulation to prevent rainwater leakage and wall moisture return. The roofing techniques used by Hongshengfa Company are resistant to freeze cracking and aging, remaining crack-free and rust-free during outdoor use.
3. Wind, Snow, and Freeze Resistance: The structural design is tailored to Changchun's climate, with light steel houses capable of withstanding earthquakes up to magnitude 9 and winds up to level 12. Concrete frame houses ensure stability and safety in snowy and windy environments by reinforcing node connections and material strength.

Production Process and Quality Control

The main bodies of prefabricated houses in Changchun adopt a factory prefabrication and on-site dry assembly model. All components are produced in a standardized manner in the factory, covering raw material procurement, steel structure welding, thermal insulation encapsulation, waterproofing, and anti-corrosion treatment, with full process control and traceability. For example, Hongshengfa Company possesses standardized workshops and CNC equipment, enabling the completion of a 200㎡ house main body in 15-20 days and overall delivery and occupancy within 2-3 months. Products undergo multiple rigorous tests before leaving the factory, including structural testing, waterproof testing, electrical safety testing, and thermal insulation and airtightness testing, to ensure no non-conforming products are delivered. Some factories have obtained ISO9001 quality management system certification, with products complying with the national 'Evaluation Standard for Prefabricated Buildings' and achieving full-process digital management.