House Prefabricated Beam Hoisting Plan

The house prefabricated beam hoisting plan should cover construction preparation, hoisting procedures, operational key points, and safety measures, as detailed below:

I. Construction Preparation

1. Component Inspection: Verify the number, orientation, appearance of lifting rings, specifications, quantity, and position of prefabricated beams to ensure accurate positioning of secondary beams and prevent hoisting accidents caused by component defects.
2. Equipment Preparation: Select appropriate cranes based on component size, weight, and installation location, such as crawler, truck-mounted, or tower cranes. Derrick cranes are suitable for heavy-duty special hoisting, while tower cranes should be matched to engineering requirements based on variants like rail-mounted or attached types.
3. Site Preparation: Use chalk lines to mark the beam bottom elevation and beam edge control lines on the corrected walls to provide a reference for precise positioning.

II. Hoisting Procedures

1. Main Beam Hoisting: Prioritize hoisting the main beams, correct the axis elevation after positioning, ensure stability through temporary fixation (e.g., support frames), and release the hook after installing supports.
2. Secondary Beam Hoisting: Hoist the secondary beams after the main beams have been corrected. Before hoisting, verify the main beam axis and elevation to avoid error accumulation.

III. Operational Key Points

1. Lifting Point Selection: Use a steel beam spreader as the lifting device, ensuring that the lifting ropes correspond one-to-one with the prefabricated beam lifting rings to prevent uneven force distribution and breakage.
2. Placement Requirements: The placement length of the composite beam should be 15mm, with 1-10mm thick shims placed at the placement points. Adjust the axis in one go according to the control lines during positioning and regulate the beam bottom elevation with independent supports.
3. Support Setting: Each prefabricated beam requires at least two independent supports. The main beam bottom formwork and supports at the junction of main and secondary beams should be positioned simultaneously to avoid local instability.
4. Trial Hoisting Inspection: Before hoisting, conduct a trial hoist to a height not exceeding 1m to inspect the lifting point position, uniformity of lifting rope tension, and component balance. Proceed with formal hoisting only after confirmation.

IV. Safety Measures

1. Plan and Training: Develop a specialized installation plan and organize training for operators to ensure that lifting equipment complies with national special equipment safety regulations.
2. Equipment Inspection: Before hoisting, inspect tools, component weight, length, and lifting point positions. Construction without preparation is strictly prohibited.
3. Protective Facilities: Equip with complete scaffolding, work platforms, guardrails, and safety nets to prevent falls from heights.
4. Steel Wire Rope Management: Inspect old steel wire ropes for damage, ensuring that no more than 5% of the wires in a single pitch are broken. Use new steel wire ropes for large components and inspect them accordingly.
5. Trial Hoisting and Supervision: Observe in stages according to the designed lifting weight, with site leadership and safety officers directing and supervising.
6. Weather Control: Immediately stop operations in case of strong winds, thunderstorms, or other severe weather conditions.
7. Hoisting Specifications: Select appropriate methods based on component weight and strictly prohibit overloading. The hook centerline must pass through the center of gravity, and adjustable lifting devices should be used for eccentric components.
8. Component Protection: Place pads at the corners where steel wire ropes contact components. Pause after lifting 0.1m for inspection and continue operations only after confirming safety.