How to Drill Holes in Container Houses

Drilling holes in container houses requires following standardized procedures. The specific methods are as follows:

I. Preparation

1. Material Inspection: Before drilling, carefully inspect the container material to confirm the absence of cracks, deformation, or rust, preventing drilling failures or structural damage due to material defects.
2. Tool Selection: Choose tools based on the hole size and material:
   • Small holes (e.g., diameter < 10 cm): Use an electric drill with a metal hole saw.
   • Medium holes (e.g., diameter 10-50 cm): Use an angle grinder or plasma cutter.
   • Large holes (e.g., diameter > 50 cm): Require oxy-acetylene cutting equipment.
   • Precision holes (e.g., complex patterns): Prefer laser cutting or waterjet cutting.
     Also, prepare protective gear such as goggles, gloves, and dust masks to ensure operational safety.

II. Marking and Positioning

1. Design Planning: Determine hole locations based on actual needs (e.g., ventilation, pipe insertion), choosing uniform or specific pattern distributions while avoiding container load-bearing structures.
2. Marking Methods:
   • Use an indelible marker to mark the container surface.
   • Right-angle partitions: Use a square and chalk lines for positioning.
   • Beveled partitions: Draw lines according to the bevel angle to ensure accurate hole placement.

III. Drilling Operations

1. Floor Drilling:
   • Adopt the π-type fixing method, aligning floor joints with the π-beam centerline, marking with chalk lines, and securing with ST4238 cross-recessed flat-head self-tapping screws at intervals of 300-350 mm.
2. Partition Drilling:
   • Pre-drilling: First, use a small-diameter drill bit (slightly smaller than the target hole) to buffer pressure and reduce cracks.
   • Drill Bit Selection: Use tungsten steel drill bits for ordinary partitions and high-speed steel drill bits for hardened steel plates.
   • Operation Monitoring: Continuously observe the drilling direction for deviations and control the drill temperature, pausing if overheated.

IV. Precautions

1. Perpendicularity: The drill bit must be perpendicular to the partition surface to avoid hole deformation or drill bit wear.
2. Speed and Pressure: Maintain moderate speed and pressure; excessive speed can break the drill bit, while insufficient speed can cause surface scratches.
3. Surface Cleaning: Before drilling, wipe the partition with a damp cloth to remove rust or dust, ensuring smooth operation.
4. Avoid Welding/Cutting: After drilling partitions, avoid welding or cutting to prevent deformation or strength reduction.

V. Final Work

1. Cleaning Debris: Use a small brush to sweep away iron filings, then thoroughly clean with a scraper or vacuum cleaner.
2. Quality Inspection: Confirm that the hole diameter meets requirements and the hole wall is smooth; rework if necessary.