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1. Pre-Installation Preparations

• Component Verification: Before hoisting, recheck components for deformation and dimensional accuracy. Proceed only if compliant.

• Foundation Inspection:

• Confirm concrete strength meets specifications.

• Inspect pre-embedded bolts or cup openings in column foundations.

• Document and address deviations in foundation position or elevation to adjust column placement.

2. Precision Installation Strategy

• Priority Installation Sequence: Begin with sections containing column bracing, tie rods, and roof bracing.

• Post-Hoisting Adjustments:

1. Re-measure column axes and elevation after hoisting.

2. Correct deviations and temporarily stabilize columns with guy ropes.

3. Install column bracing, roof beams, and inter-beam tie rods (referred to as rough installation).

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3. Temporary Fixing and Secondary Component Installation

• Elongated Bolt Holes: Design temporary fixing holes for on-site welded parts as elongated holes to facilitate alignment and precision adjustment.

• Purlin Connection Holes:

• Avoid on-site cutting or grinding of purlins at height due to positional deviations.

• Risks include operational hazards, compromised coatings, and aesthetic damage.

• Use elongated holes for single-sided connections of purlins, with enlarged matching washers.

• Critical Safety Note: