Rural House Prefabricated Slab Hoisting

The hoisting of prefabricated slabs for rural houses must adhere to technical specifications and safety requirements, ensuring quality and safety through scientific construction. The specific process is as follows:

I. Construction Preparation Phase

1. Technical Preparation: It is necessary to verify architectural floor plans, structural layout diagrams, and prefabricated slab installation node diagrams to clarify the model, quantity, and installation positions of the prefabricated slabs. The construction team must receive technical briefings to master the hoisting sequence (such as the principle of 'inside first, outside later; far first, near later'), safety operation specifications (such as high-altitude work protection and rope inspection), and quality control standards (such as flatness and elevation error ranges).
2. Material and Tool Preparation: Prefabricated slabs must be procured according to design requirements, with supporting materials including fine aggregate concrete, cement mortar, and steel mesh. Tools such as hoisting ropes, simple gantry cranes, manual hoists, and guide pulleys must be prepared, ensuring that the equipment's load-bearing capacity meets the weight requirements of the prefabricated slabs.
3. Site Preparation: Prefabricated slabs should be stacked in the upwind area of the construction site, with wooden squares placed on the ground for moisture prevention. The stacking height should not exceed three layers to avoid tipping. The transportation path must be paved with gravel, with width and slope meeting vehicle traffic requirements to prevent damage to the prefabricated slabs during transportation.

II. Hoisting Operation Phase

1. Hoisting Sequence and Equipment Selection: In the absence of large-scale hoisting equipment, a simple gantry crane combined with a manual hoist can be used for hoisting. The hoisting sequence must follow the principle of 'inside first, outside later; far first, near later' to avoid imposing additional loads on the already installed prefabricated slabs.
2. Hoisting Process Control: During hoisting, the prefabricated slab must be kept stable to avoid colliding with walls or already installed components. The prefabricated slab must be in full contact with the top surface of the wall, and suspended installation is strictly prohibited to prevent local stress concentration and cracking.

III. Installation Detail Handling

1. Base Treatment: Before hoisting, the top of the wall must be moistened with water and leveled with high-grade cement mortar to ensure a flat and solid base, reducing the risk of settlement after the prefabricated slab is installed.
2. Slab Bottom Support and Slab Joint Treatment: Temporary supports must be provided at the bottom of the prefabricated slab to prevent bending or cracking. The width of the slab joints must comply with design requirements, generally filled with fine aggregate concrete or reinforced with steel mesh before filling to enhance structural integrity.

IV. Safety and Quality Control

1. Safety Operation Specifications: High-altitude work requires the wearing of safety harnesses, and hoisting equipment must be regularly inspected for rope wear. Overloading operations are strictly prohibited.
2. Quality Control Standards: After installation, the flatness (error ≤ 5mm) and elevation (error ≤ 8mm) of the prefabricated slabs must be checked. The slab joint filling must be dense and free of voids to ensure roof waterproofing performance.

V. Price and Selection Recommendations
The price of prefabricated slabs is calculated by length. Roof construction using prefabricated slabs is fast and cost-effective but has issues with rain leakage and poor thermal insulation. In areas not prone to earthquakes and with limited budgets, prefabricated slabs can be prioritized; if there are requirements for thermal insulation or earthquake resistance, other materials or structural forms must be considered in combination for comprehensive design.