Fixed Structure Inspection

Foundation & Settlement

• Settlement Observation Points: Designated personnel must check daily.

• Clearance Zone: No material within 2 meters of the foundation. Report water accumulation immediately.

• Geological Abnormalities: If exceeds standards within 16 hours, activate the professional inspection team for parameter reset.

Metal Structure

• Bolt Connections: Use a vernier caliper to ensure threaded exposure of standard section connection bolts remains within 3-4 threads.

• Bolt Alignment: Check with a level gauge; installation angle deviation must be ≤0.1%.

• Welding Cracks: Inspect critical nodes (boom, tower cap, slewing ring) with a magnifier. Darkened weld surfaces indicate potential cracks.

• Paint Damage: If fish-scale peeling covers 5m², suspend operations and conduct magnetic particle testing for subsurface cracks.

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Moving Parts & Mechanical Systems

Slewing Mechanism

• Gear Inspection: Remove inspection end cover; check lubricant discoloration/hardening with a flashlight.

• Rotation Test: Use a specialized wrench to rotate the slewing base smoothly for 3 revolutions without mechanical aid.

Hoisting System

• Hook Inspection: Use 5x magnifier to check wear on critical sections. Replace if wear exceeds 12% of original尺寸.

• Pulley Inspection: Replace if radial wear exceeds 30% of wire rope diameter. Missing guards require equipment.

• Wire Rope Test: Conduct no-load test with 500kg sandbag; observe rope arrangement during 5m hoisting.

Emergency Brake

• Brake Test: Technicians wearing harnesses must simulate power failure; trolley must stop within 30 seconds.

Functional & Safety Devices

Electrical Systems

• Cable Management: Check cable tie integrity. Use epoxy board to support damaged cable slots.

• Control Box: Test contact terminals with a voltage tester; replace components if erosion depth >30% after 50 operations.

• Grounding: Measure resistance; halt operations if exceeding 1mΩ. Lightning grounding points require 15-day soil humidity monitoring.

Safety Devices

• Moment Limiter: Calibrate to ensure error ≤1/500 of rated value.

• Wind Speed Alarm: Third-party device must trigger 5 minutes before Level 10 winds, with uninterrupted 360-second alert.

• Obstacle Avoidance: Add ultrasonic calibration procedures in fog/haze conditions.

Operational Components

• Counterweights: Verify quantity against nameplate; recalculate if error >1/400 of manufacturer’s specification.

• Hook Block Rollers: Must protrude ≥7mm above running surface. Track clearance requires temperature-compensated calibration.

Certifications & Documentation

Personnel & Permits

• Operator Certification: Quarterly license required to access control panel’s six-color keypad.

• Third-Party Validation: Certifications must be updated one week in advance.

Documentation & Records

• Total Assembly Diagram: Must match technical department’s blue stamp and crane’s steel imprint.

• Dynamic Records: Manually dial detection channels; lock data promptly. Shift records archived by document controllers.

• Maintenance Logs: Handwritten notes cannot replace computer-generated five-color spectral fault analysis reports.

Weather & Environmental Measures

Wind Conditions:

• Level 3+ winds: Focus on foundation water monitoring.

• Level 6+ winds: Install cross-slings for enhanced anchoring, even if inspections pass.

• Post-Storm Checks: Re-test grounding mechanical integrity after thunderstorms.

• Night/Rain Inspections: Deploy 4-person team to monitor metal strain and voltage drops.

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Special Procedures & Key Policies

UNIQUEMAC Protocols

• Three Musts Principle:

  1. Operator-certificate alignment.

  2. Complete warning signage deployment.

  3. Environmental safety boundaries met.

• Defect Handling: Mark issues in shift logs; both parties must revisit sites with markers before signing.

• Recurring Issues: If a fault recurs 3 times in 2 months, suspend operations for 10 days for expert redesign evaluation.

Pre-Shift Conference

• Address cross-lifting safety zones, power phase balance, and fog compensation.

• Obtain unanimous team approval before lifting approval tags.

Digital Management

• QR Code Tracking: Generate unique codes for each inspection point. Upload 9-grid photos + 5-second videos within 15 minutes of rectification.

• Approval Chain: Requires production leader and triple-inspector confirmation for log entry.

Note: This checklist mitigates but cannot eliminate all risks. Operate personnel must maintain continuous inspection cycles (daily/shift/emergency) to achieve quantitative closed-loop safety control.