Information To Assess Right Way Forward

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Information To Assess Right Way Forward

• Cause of damage
• Would you have surgery without seeing a physician
  to see what is wrong?
• Extent of damage
• Job blow out
• Expands to become structural
• Structural significance of damage
• If it will not become unsafe or cause loss leave
  it
• Likely future damage if left two extremes
• If it wont fail in design life leave it
• A stich in time
• Prognosis if repaired
• Some repairs cause more problems than they solve
• Life Cycle Cost Cheap and repetitive vs once
  off and long life

2
Client Interview

• Ask questions
• What does he want in terms of
• Overall Life
• Aesthetics
• Operational interference
• Safety
• Budget (lowest cost now or long term)
• Risk
• Consequence of failure (Likelihood comes from
  survey)
• History
• Design, construction, operation and maintenance
• Inform
• Company policy on
• Approach to assessment and repair
• Liability involved
• Risk minimalisation
• Confirm in writing

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Damage Assessment
Repair Patch Injection CP Coating Environmental Co
ntrol
Damage Spalling Cracking Active Corrosion Future
Activation Future Damage
Survey Method Visual Visual Potential,
Drummy Cl-, Carb, Cover Resistivity Polarisation
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Planning - the most cost effective survey tool

• Split structure into environments
• Prepare proformas based on
• structural assessment
• detailing general arrangement
• expected damage
• environmental exposure
• usage
• Prepare inspection testing plan
• Adopt defect classification code

5
Spray Zone
Intermediate Zone
Splash Zone
Variable Pressure Hollow Leg
High Pressure Hollow Leg
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