Classification of Prefabricated Building Structural Systems
Advantages of Steel Structure Prefabricated Buildings
1. Prefabricated concrete and steel structures are the two main types of prefabricated building systems.
2. Steel structures naturally align with green building principles.
3. Well-designed steel structure buildings offer key benefits: they are lightweight, fast to construct, high quality, and cost-effective.
Detailed Explanation of Steel Structure Advantages
Lightweight
Steel structural materials are both lightweight and strong, reducing building weight by approximately 30% compared to traditional concrete structures.
Fast Construction
Due to their unique construction features, steel structures can be built over 50% faster than precast concrete (PC) structures.
Superior Quality
Steel structure buildings that are carefully engineered deliver excellent performance and durability.
Cost Efficiency
Steel structures offer multiple economic benefits:
- They are lightweight and high-strength, saving on material usage.
- Construction processes conserve energy, water, and land.
- Materials are detachable and recyclable, with recovery rates up to 70%.
- Well-designed steel structures generally have lower overall costs.
Some cost specifics include:
① Steel consumption for low-rise, mid-rise, and high-rise steel residential buildings is approximately 35kg/㎡, 50kg/㎡, and 75kg/㎡ respectively, with structural costs around 300, 380, and 600 yuan per square meter.
② Rising labor costs make traditional concrete structures — including labor, formwork, and materials — more expensive than steel structures.
③ Precast concrete (PC) buildings cost about 400 yuan per square meter, higher than traditional concrete buildings.
⑤ For specific building types like dormitories, using prefabricated steel structures can reduce costs by approximately 30% compared to prefabricated concrete solutions.
Building Types Suitable for Steel Structure Assembly
Steel structures are particularly advantageous for:
- Dormitories, office buildings, hotels, residential buildings, and resettlement housing, including high-rise residential constructions.
- Standardized gas stations, sports halls, warehouses, and prefabricated research and development facilities.
- Prefabricated buildings such as police kiosks, sentry posts, and newsstands, which can be rapidly assembled on-site using machined connectors.
- Rapid assembly buildings intended for export, especially to island nations.
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