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Information To Assess Right Way Forward

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

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Information To Assess Right Way Forward

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  1. 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*

  3. Damage Assessment Repair Patch Injection CP Coating Environmental Control Damage Spalling Cracking Active Corrosion Future Activation Future Damage Survey Method Visual Visual Potential, Drummy Cl-, Carb, Cover Resistivity Polarisation

  4. 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

  6. Complex Simple Simplicity = Operability x Interpretability Low Use 1 6 25 Low Value 0.2 TP IEold GPRold LPR GPRnew IEnew/Crack Value = Applicability / Cost 1 High Value IEnew/Thick CR ISAT REP DRH RCMr High Use 5

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