Design Drawings for Prefabricated Beam-Slab Houses

Currently, complete design drawings for prefabricated beam-slab houses cannot be provided directly, but key information can be offered based on typical cases and design principles for reference. The design of prefabricated beam-slab houses requires a comprehensive consideration of structural types, material properties, construction conditions, and usage requirements. The following sections elaborate on structural characteristics, engineering cases, and design recommendations:

I. Core Characteristics of Prefabricated Beam-Slab Structures

Prefabricated beam-slab structures are formed by connecting prefabricated slabs (floor or roof slabs) and prefabricated beams (main or secondary beams) through reliable connections to create an integrated load-bearing system. In terms of material selection, reinforced concrete prefabricated beam-slabs are widely used due to their low cost and good durability. Meanwhile, UHPC (Ultra-High Performance Concrete) prefabricated beam-slabs, with their high strength and toughness, can reduce the structural self-weight by 20%-30% and enable fully prefabricated and assembled construction, making them suitable for large-span or high-rise buildings. The connection method is crucial, requiring the use of reserved reinforcement, sleeve grouting, or bolt connections to ensure coordinated work between beams and slabs and avoid local stress concentrations.

II. Typical Engineering Case References

1. Shanghang Environmental Protection Technology Industrial Park Project: This project adopts a fully assembled beam-slab integrated system without formwork or temporary supports, with a main beam span of up to 12m and an assembly rate of 94%. Its core advantage lies in the optimized design of prefabricated beam-slabs and temporary support systems, achieving "five-free" green construction (free from formwork, temporary supports, external scaffolding, tower cranes, and elevators), significantly shortening the construction period and reducing safety risks.
2. Assembled Monolithic High-Rise Frame Structure Project: In this project, the main load-bearing direction frame beams use pre-tensioned prestressed prefabricated composite beams, with local floor slabs using steel truss composite slabs and the first-floor slab using prefabricated prestressed hollow slabs. This design enhances the overall structural integrity through cast-in-place concrete in the composite layer and improves the beam's crack resistance using prestressing technology, making it suitable for areas with high seismic fortification requirements.

III. Design Recommendations and Considerations

1. Structural Column Layout: For rural house construction using prefabricated slabs, the layout of structural columns should be adjusted according to geological conditions. For example, in earthquake zones or soft soil foundation areas, the spacing between structural columns should be reduced (recommended ≤4m), and node connections should be strengthened to prevent structural damage caused by earthquakes or foundation settlement.
2. Space Optimization: For bedroom areas, it is recommended to have a width of ≥3.6m, a depth of ≥4.2m, and an area of approximately 15㎡ to meet basic usage requirements. If prefabricated beam-slabs are used, the positions for pipeline embedment should be planned in advance to avoid damaging the structure through later trenching.
3. Drawing Acquisition: Specific design drawings should refer to the detailed construction drawings of projects such as the "Assembled Monolithic High-Rise Frame Structure" or the "Shanghang Environmental Protection Technology Industrial Park," or be customized by professional institutions based on building functions, load requirements, and regulatory standards.

Note: The design of prefabricated beam-slabs must strictly comply with regulations such as the "Technical Standard for Prefabricated Concrete Buildings" (GB/T 51231-2016) to ensure structural safety and construction feasibility.