Bagaimana cara aman melakukan blind lift dengan crane?

Blind Lift adalah crane operation dimana operator tidak bisa melihat load atau landing zone secara langsung dari cabin - high-risk scenario yang memerlukan extra precautions.

Kapan Blind Lift Terjadi:

• Lifting over building atau obstruction
• Long radius lift dimana load beyond visual range
• Night operation dengan limited lighting
• Lifting dari confined space

Hazards of Blind Lift:

• Collision dengan structure atau other equipment
• Load snagging pada obstruction
• Personnel in landing zone - tidak visible dari operator
• Incorrect load positioning

Mandatory Controls untuk Blind Lift:

1. Lift Plan (Non-negotiable)

• Detail drawing showing lift path, clearance, radius
• Load weight, rigging configuration, crane setup
• Communication protocol
• Emergency procedure
• Approved by competent person (lift supervisor/engineer)

2. Qualified Signalman/Banksman

• Minimum 1, ideally 2 untuk complex lift
• Positioned dengan clear view dari load AND operator
• Trained di standard hand signal atau radio protocol
• Has stop work authority

3. Communication System

Radio Communication (Preferred):

• Dedicated channel untuk lift operation
• Clear, specific commands
• Operator repeat back setiap instruction untuk confirm

Example Radio Protocol:

• Signalman: "Hoist 2 meters, slowly"
• Operator: "Hoisting 2 meters, slowly" (execute)
• Signalman: "Stop"
• Operator: "Stopping"

Hand Signals (If Visual Contact Maintained):

• Use standard signal per regulation
• Only ONE designated signalman - avoid confusion

4. Pre-Lift Meeting

• All personnel involved briefed tentang:
• Lift sequence
• Communication method
• Hazards dan controls
• Emergency stop signal
• Exclusion zone

5. Test Lift

• Lift load 6 inches off ground
• Hold untuk verify rigging, balance, brake
• Check communication working
• If okay - proceed dengan lift

Operator Actions:

• ONLY follow signalman instruction - ignore others
• Slow, controlled movement - no rush
• If lose communication - STOP immediately
• If uncertain - STOP and clarify

Blind lift accidents are often fatal - meticulous planning saves lives!