Management of Structures Aspirations and Reality Multi-storey car parks

NCP since Pipers Row New technical services structure Consultant appointments Participation in technical studies ICE Recommendations Extensive structural appraisal programme Formal budgets for capital expenditure works Framework contracts Compliance with latest legislation

Aspirations for car park owners/operators Adopt ICE Recommendations Structural appraisals Obtain recommendations for further works Value engineering Formalise capital expenditure works Undertake essential/beneficial improvement works Minimal disruption to operation Public safety

ICE Recommendations for the inspection, maintenance and management of car park structures Life care plan –Appointment of an experienced engineer –Advice on structural safety –Inspection regime –Base line Safety certification –Assessment to current design standards

Base line Existing appraisal (less than 8 years old) New appraisal –Main building structure –External cladding –Vehicle impact barriers –Pedestrian guarding –Protective coatings –Associated elements

Desk study Record search –Building owners/operators –Local Authorities –Previous works contractors –Talk to locals Layout drawings Previous reports Review of records

Information gathering Supplementary site measure Condition survey Testing regime –Local breakouts for bar size & condition –Chloride contamination –Carbonation front –Cores for strength testing –Half cells for rates of corrosion

Assessments Local structural weakness Vulnerability of detail Robustness Strength of representative elements Integrity of cladding and fixings Adequacy of barriers Climbability Spalling concrete and associated risks

Structural appraisal Conclusions –Condition –Safety Recommendations –Further investigations –Repair works

Further survey Recommendations for further survey –Detailed hammer survey –Areas requiring specialist access –Intrusive investigations –Load testing –Drainage pressure jetting &/or CCTV survey

Reality Problem areas –Lack of record drawings –No reinforcement details –Elderly structures –Irregular geometry –Adjoining properties –Concealed fixings –Sub-standard support for vehicle impact barriers –Safety statement

Review of aspirations ICE Recommendations are easily adopted Structural appraisals are being undertaken Recommendations form basis for further works Value engineering used to align structural requirements with available capital Many improvements to building stock Minimal disruption to operation Public safety