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Safety assessment in design and preparation phase
Arbouw Health and Safety in construction industry. Paul Swuste, TU Delft. Adri Frijters, Arbouw. Amsterdam, The Netherlands.
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Problem Design a model designer can use to chose between alternative building elements on basis of safety aspects during execution phase
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Literature review Method Test / case Method and techniques
Falling from …. Stumbling ….
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Result Based upon Method BS8800 EN1005 and EN292-1 Analyse elements
Function and properties Initial and final situation Selection of alternatives Activities Assessment & improvements Selection of element
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Case study Eurotoren
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Floor systems Hollow-core beam slab Wide-slab floor
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The method Preconditions Inventory of applicable building systems
Determing the boundaries of the system Inventory of the activities per construction form Identification of hazards Determing the risk Decision regarding the acceptability of the risk Allocating the man-hours to the activities Determing exposure Choice of building element
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The method Preconditions Inventory of applicable building systems
Determing the boundaries of the system Inventory of the activities per construction form Identification of hazards Determing the risk Decision regarding the acceptability of the risk Allocating the man-hours to the activities Determing exposure Choice of building element
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Inventory of the activities
Hollow core-beam floor Erecting guardrail Setting out dimensions Applying bearing felt Inserting end filling Laying floor elements Fitting bars Applying tension rods Pouring joints Wide-slab floor Erecting guardrail Setting out dimensions Adjusting props Laying slabs Checking dimensions Dimensions reinforcement Transport reinforcement Welding-wire meshing Twisting reinforcement Preparing pouring Arranging equipment Pouring floor Clearing up After care Cleaning Stripping props
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The method Preconditions Inventory of applicable building systems
Determing the boundaries of the system Inventory of the activities per construction form Identification of hazards Determing the risk Decision regarding the acceptability of the risk Allocating the man-hours to the activities Determing exposure Choice of building element
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Determing the Risk Minor injury Injury Serious injury
Highly improbable Insignificant risk Acceptable risk Moderate risk Improbable Significant risk Probable Unacceptable risk
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The method Preconditions Inventory of applicable building systems
Determing the boundaries of the system Inventory of the activities per construction form Identification of hazards Determing the risk Decision regarding the acceptability of the risk Allocating the man-hours to the activities Determing exposure Choice of building element
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Acceptability of risk Wide-slab floor Falling and stumbling
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The method Preconditions Inventory of applicable building systems
Determing the boundaries of the system Inventory of the activities per construction form Identification of hazards Determing the risk Decision regarding the acceptability of the risk Allocating the man-hours to the activities Determing exposure Choice of building element
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Allocating man-hours Hollow core-beam floor Wide-slab floor
Erecting guardrail Setting out dimensions 2.00 Applying bearing felt 1.70 Inserting end filling 3.36 Laying floor elements 10.80 Fitting bars Applying tension rods 0.08 Pouring joints Wide-slab floor Erecting guardrail Setting out dimensions Adjusting props Laying slabs Checking dimensions Dimensions reinforcement Transport reinforcement Welding-wire meshing Twisting reinforcement Preparing pouring Arranging equipment Pouring floor Clearing up After care Cleaning Stripping props
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The method Preconditions Inventory of applicable building systems
Determing the boundaries of the system Inventory of the activities per construction form Identification of hazards Determing the risk Decision regarding the acceptability of the risk Allocating the man-hours to the activities Determing exposure Choice of building element
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Determing exposure Wide-slab floor Hollow core-beam floor
Erecting guardrail Setting out dimensions Adjusting props Laying slabs Checking dimensions Dimensions reinforcement Transport reinforcement Welding-wire meshing Twisting reinforcement Preparing pouring Arranging equipment Pouring floor Clearing up After care Cleaning Stripping props Hollow core-beam floor Erecting guardrail Setting out dimensions 2.00 Applying bearing felt 1.70 Inserting end filling 3.36 Laying floor elements 10.80 Fitting bars Applying tension rods 0.08 Pouring joints Minor injury Injury Serious injury Highly improbable Insignificant risk Acceptable risk Moderate risk Improbable Significant risk Probable Unacceptable risk
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Choise of element Wide-slab floor Hollow core-beam floor
Erecting guardrail Setting out dimensions Adjusting props Laying slabs Checking dimensions Dimensions reinforcement Transport reinforcement Welding-wire meshing Twisting reinforcement Preparing pouring Arranging equipment Pouring floor Clearing up After care Cleaning Stripping props Hollow core-beam floor Erecting guardrail Setting out dimensions 2.00 Applying bearing felt 1.70 Inserting end filling 3.36 Laying floor elements 10.80 Fitting bars Applying tension rods 0.08 Pouring joints Minor injury Injury Serious injury Highly improbable Insignificant risk Acceptable risk Moderate risk Improbable Significant risk Probable Unacceptable risk
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Conclusions and Recommendations
Method works Method is easy to use Method is labour-intensive Database Use in case of doubt Fulfil safety in design phase Acceptable Thank You for your attention
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