Container House Hoisting Plan

The container house hoisting plan needs to be designed in combination with structural characteristics, site conditions, and safety regulations, with core steps including equipment selection, foundation treatment, hoisting operations, and safety protection.

1. Equipment Selection and Configuration

Based on the container specifications (e.g., a 20-foot container has a self-weight of 2.3 tons, and a 40-foot high-cube container has a self-weight of 4.8 tons) and stacking height (e.g., a maximum of 3 layers), lifting equipment with a matching rated lifting capacity needs to be selected. For example, a 25-ton truck crane (with a fully extended main boom of 42 meters) can meet regular requirements. It needs to be equipped with ISO standard container spreaders (with a rated load of 30 tons), steel wire ropes (with a breaking force ≥ 289 kN), and shackles and other auxiliary tools. If the operating radius is limited or quick position adjustment is required, chain hoists (e.g., 10-ton class) can be added for fine-tuning alignment.

2. Foundation Treatment and Site Requirements

The bearing capacity of the foundation in the hoisting area needs to meet the load requirements of the equipment and containers. For example, a plain fill foundation needs to be hardened with a 200mm thick C30 concrete layer to make the ground bearing capacity ≥ 200 kPa. If there are weak soil layers on the site, graded sand and gravel should be used for layered compaction (with a compaction degree ≥ 93%) or replacement treatment. In addition, it is necessary to plan operating access roads (e.g., 12 meters wide in the east-west direction), set drainage slopes (e.g., 5‰), and establish protective isolation zones (e.g., maintaining a 15-meter safety distance from a 10 kV high-voltage line on the east side).

3. Hoisting Operation Procedures

1. Lifting Point Selection: Priority should be given to using the top corner fittings of the container as lifting points to ensure that the spreader's twist-lock synchronous control function is normal and to avoid structural deformation caused by eccentric loading.
2. Trial Hoisting and Stability Calculation: Before hoisting, a stability calculation for a 40-foot high-cube container should be carried out (e.g., the minimum overturning moment should be greater than the actual overturning moment), and the bearing capacity of the outrigger foundation should be checked (e.g., the outrigger pressure of a 25-ton crane should be less than 200 kPa).
3. Layered Stacking: When stacking multiple containers, the verticality deviation should be controlled (e.g., ≤ 1/500 of the layer height), and the upper and lower containers should be fixed with angle steel gusset plates and bolts to enhance overall stability.

4. Safety Protection Measures

1. Environmental Monitoring: Monitor the wind speed in real-time (e.g., suspend operations when the historical maximum gust reaches 15 m/s), and set up warning lights (e.g., LED flashing type) to mark the operating area.
2. Personnel Training: Operators need to be certified, be familiar with standards such as the Safety Regulations for Lifting Appliances (GB6067.1-2025), and master emergency plans (e.g., emergency escape routes in case of steel wire rope breakage).
3. Equipment Inspection: Before daily operations, check the spreader's twist-locks, the wear amount of the steel wire ropes (e.g., discard if the diameter is reduced by 7%), and the reliability of the crane's braking system.