Safety assessment in design and preparation phase Arbouw Health and Safety in construction industry. Paul Swuste, TU Delft. Adri Frijters, Arbouw. Amsterdam, The Netherlands. www.arbouw.nl
Problem Design a model designer can use to chose between alternative building elements on basis of safety aspects during execution phase
Literature review Method Test / case Method and techniques Falling from …. Stumbling ….
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
Case study Eurotoren
Floor systems Hollow-core beam slab Wide-slab floor
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
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
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
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
Determing the Risk Minor injury Injury Serious injury Highly improbable Insignificant risk Acceptable risk Moderate risk Improbable Significant risk Probable Unacceptable risk
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
Acceptability of risk Wide-slab floor Falling and stumbling
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
Allocating man-hours Hollow core-beam floor Wide-slab floor Erecting guardrail 4.00 Setting out dimensions 2.00 Applying bearing felt 1.70 Inserting end filling 3.36 Laying floor elements 10.80 Fitting bars 0.08 Applying tension rods 0.08 Pouring joints 1.48 Wide-slab floor Erecting guardrail 4.00 Setting out dimensions 2.00 Adjusting props 15.12 Laying slabs 13.00 Checking dimensions Dimensions reinforcement Transport reinforcement Welding-wire meshing Twisting reinforcement 19.50 Preparing pouring Arranging equipment Pouring floor Clearing up After care Cleaning 14.33 Stripping props 15.12
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
Determing exposure Wide-slab floor Hollow core-beam floor Erecting guardrail 4.00 Setting out dimensions 2.00 Adjusting props 15.12 Laying slabs 13.00 Checking dimensions Dimensions reinforcement Transport reinforcement Welding-wire meshing Twisting reinforcement 19.50 Preparing pouring Arranging equipment Pouring floor Clearing up After care Cleaning 14.33 Stripping props 15.12 Hollow core-beam floor Erecting guardrail 4.00 Setting out dimensions 2.00 Applying bearing felt 1.70 Inserting end filling 3.36 Laying floor elements 10.80 Fitting bars 0.08 Applying tension rods 0.08 Pouring joints 1.48 Minor injury Injury Serious injury Highly improbable Insignificant risk Acceptable risk Moderate risk Improbable Significant risk Probable Unacceptable risk
Choise of element Wide-slab floor Hollow core-beam floor Erecting guardrail 4.00 Setting out dimensions 2.00 Adjusting props 15.12 Laying slabs 13.00 Checking dimensions Dimensions reinforcement Transport reinforcement Welding-wire meshing Twisting reinforcement 19.50 Preparing pouring Arranging equipment Pouring floor Clearing up After care Cleaning 14.33 Stripping props 15.12 Hollow core-beam floor Erecting guardrail 4.00 Setting out dimensions 2.00 Applying bearing felt 1.70 Inserting end filling 3.36 Laying floor elements 10.80 Fitting bars 0.08 Applying tension rods 0.08 Pouring joints 1.48 Minor injury Injury Serious injury Highly improbable Insignificant risk Acceptable risk Moderate risk Improbable Significant risk Probable Unacceptable risk
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 www.arbouw.nl frijters@arbouw.nl