2025-02-24    251

Below are critical points to ensure safety and efficiency in steel structure construction, reflecting industry best practices:

‌1. Reinforcement Hole Sizing‌

• ‌Minimize hole dimensions‌ on structural steel sections to preserve material strength and reduce waste.
• ‌Account for edge symmetry‌: For rebar with diameters exceeding 25mm, anticipate a 1–2mm tolerance increase due to drilling.

‌2. Precision in Anchor Hole Alignment‌

• ‌Ensure hole alignment‌ (vertical/horizontal) to avoid rebar installation issues.

• ‌Coordinate between teams‌: Resolve discrepancies between steel and civil contractors through real-time communication.

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‌3. Base Column Installation‌

‌Lightweight Columns‌:

• Use ‌mechanical lifting‌ (e.g., cranes) for positioning, paired with ‌manual alignment‌ for precision.
• ‌Advantages‌:
• Ensures positional accuracy.
• Leverages pre-fabricated column bases (centered and parallel contours from factories).
• Streamlines workflow: Align column baseplate corners with leveling pads using cranes or hoists.

‌Verticality Verification‌:

• Deploy ‌two theodolites‌ on the column’s orthogonal axes.
• Adjust the column until its centerline aligns with both theodolite sightlines to guarantee vertical accuracy.

‌Why This Matters‌
These practices optimize structural integrity, minimize rework, and accelerate project timelines—key priorities for U.S. engineering and construction teams.