2025-03-27    161

1. Fabrication Precision Control
The accuracy of steel structure fabrication is critical to ensuring dimensional precision of the overall structure and smooth installation. Key parameters requiring strict control include:

• Straightness and distortion of steel columns.

• Distance from connection holes to column base plates.

• Machining precision of connection holes.

• Straightness of roof beams and accuracy of beam-column connection plates.

• Positioning of bracing or tie rod connection plates relative to beams/columns.

• Location accuracy of purlin support plates.

2. Transportation and Handling Controls
To prevent deformation during transportation:

• Transportation:

• Require transport contractors to add multiple support points along the full length of components.

• Use wooden spacers between parts to ensure firm contact.

• Secure external lashing to minimize vibration- or compression-induced deformation.

• Lifting and Unloading:

• Employ two-point lifting. For oversized components, use spreader beams and additional lifting points.

• On-site Storage:

• Limit stacking layers (≤3 layers).

• Increase support points to prevent compressive deformation.