designing for construction safety concepts and practice
TRANSCRIPT
Designing for Construction Designing for Construction Safety:Safety:
Concepts and PracticeConcepts and Practice
John Gambatese, PhD, PEJohn Gambatese, PhD, PESchool of Civil and Construction EngineeringSchool of Civil and Construction Engineering
Oregon State UniversityOregon State University
2009 DOE ISM Conference2009 DOE ISM ConferenceKnoxville, TNKnoxville, TN
August 24-27, 2009August 24-27, 2009
Bio – John GambateseBio – John Gambatese John Gambatese is an Associate Professor in the School of Civil and Construction John Gambatese is an Associate Professor in the School of Civil and Construction
Engineering at Oregon State University. Dr. Gambatese’s educational background Engineering at Oregon State University. Dr. Gambatese’s educational background includes Bachelor and Master of Science degrees in Civil Engineering from the includes Bachelor and Master of Science degrees in Civil Engineering from the University of California at Berkeley with emphases in structural engineering, and a University of California at Berkeley with emphases in structural engineering, and a Ph.D. in Civil Engineering from the University of Washington in the area of Ph.D. in Civil Engineering from the University of Washington in the area of construction engineering and management. He has worked in industry as a structural construction engineering and management. He has worked in industry as a structural engineer, and as a project engineer for a construction management firm. Dr. engineer, and as a project engineer for a construction management firm. Dr. Gambatese has taught courses on construction contracts and specifications, Gambatese has taught courses on construction contracts and specifications, construction safety and productivity improvement, planning and scheduling, structural construction safety and productivity improvement, planning and scheduling, structural analysis and design, temporary construction structures, and engineering economics. analysis and design, temporary construction structures, and engineering economics. He has performed research and published numerous articles on construction worker He has performed research and published numerous articles on construction worker safety, constructability, innovation, construction contracting, and life cycle properties safety, constructability, innovation, construction contracting, and life cycle properties of civil engineering facilities. He is a member of the American Society of Civil of civil engineering facilities. He is a member of the American Society of Civil Engineers (ASCE) and American Society of Safety Engineers (ASSE), and actively Engineers (ASCE) and American Society of Safety Engineers (ASSE), and actively participates on ASCE’s Construction Site Safety Committee, Constructability participates on ASCE’s Construction Site Safety Committee, Constructability Committee, and Construction Research Council. He is a licensed Professional Civil Committee, and Construction Research Council. He is a licensed Professional Civil Engineer in California. Engineer in California.
Prevention through Design Prevention through Design (PtD)(PtD)
““Addressing occupational safety and Addressing occupational safety and health needs in the design process to health needs in the design process to prevent or minimize the work-related prevent or minimize the work-related hazards and risks associated with the hazards and risks associated with the construction, manufacture, use, construction, manufacture, use, maintenance, and disposal of facilities, maintenance, and disposal of facilities, materials, and equipment.” materials, and equipment.”
(http://www.cdc.gov/niosh/topics/PTD/)
What is Designing for Construction What is Designing for Construction Safety (DfCS)?Safety (DfCS)?
Application of Prevention through Application of Prevention through Design concepts to construction Design concepts to construction worker safetyworker safety The process of addressing The process of addressing
construction site safety and health in construction site safety and health in the design of a projectthe design of a project
Recognizes construction site Recognizes construction site safety as a design criterionsafety as a design criterion
““Safety Constructability”Safety Constructability”
Why Design for Construction Why Design for Construction Safety?Safety?
22%22% of 226 injuries that occurred from of 226 injuries that occurred from 2000-2002 in Oregon, WA, and CA2000-2002 in Oregon, WA, and CA11
42%42% of 224 fatalities in US between of 224 fatalities in US between 1990-20031990-200311
In Europe, a 1991 study concluded that In Europe, a 1991 study concluded that 60%60% of fatal accidents resulted in part of fatal accidents resulted in part from decisions made before site work from decisions made before site work beganbegan22
11 Behm, M., “Linking Construction Fatalities to the Design for Behm, M., “Linking Construction Fatalities to the Design for Construction Safety Concept” (2005)Construction Safety Concept” (2005)
2 2 European Foundation for the Improvement of Living and European Foundation for the Improvement of Living and Working ConditionsWorking Conditions
Ability to Influence SafetyAbility to Influence Safety
Conceptual Design
Detailed Engineering
Procurement
Construction
Start-up
High
Low
Ability to Influence
Safety
Project Schedule
(Source: Szymberski, 1987)
1.1. Eliminate the hazard (Eliminate the hazard (Design for SafetyDesign for Safety))2.2. Reduce the hazardReduce the hazard3.3. Isolate the hazardIsolate the hazard4.4. Use engineering controlsUse engineering controls5.5. Use administrative controlsUse administrative controls6.6. Use personal protective equipment (PPE)Use personal protective equipment (PPE)
Hierarchy of ControlsHierarchy of Controls
(Sources: Manuele, 1997; Andres, 2002)
Design ExamplesDesign Examples
Example Tools and ProcessesExample Tools and Processes
Begin Concept Design
Commence Construction
CHAIR-2
CHAIR-3
Project Phase
CHAIR-1
Review of Concept Design
Review of Detailed Design
Construction Hazard Assessment and Implication Review (CHAIR) process
Design for Construction Safety ToolBox
Example Tools and ProcessesExample Tools and Processes
Design Kickoff Design Internal
ReviewIssue for
ConstructionExternal Review
Trade contractor involvement
• Establish design for safety expectations
• Include construction and operation perspective
• Identify design for safety process and tools
• QA/QC
• Cross-discipline review
• Focused safety review
• Owner review
(Source: Hecker et al., 2005)
Example Training and Safety Alert Example Training and Safety Alert SystemSystem
All A/E’s attend training courses for:All A/E’s attend training courses for: Construction site safetyConstruction site safety Designing inherently safe buildingsDesigning inherently safe buildings
Safety Alert System (SAS):Safety Alert System (SAS): Safety reviews during document preparationSafety reviews during document preparation Safety symbols placed on drawings at Safety symbols placed on drawings at
locations of potential hazardslocations of potential hazards
(Source: The Haskell Company, 2004)
Integration of Product and Process Integration of Product and Process DesignDesign
ManufacturingTaxonomy Levels Construction
Project
Division
Activity
Basic Task
Elemental Motion
Orthopedics
Cell
Design-Fabrication Interface
Machine
Design-Fabrication Interface
Pro
duct
De
sign
Pro
cess
Des
ign
Fab
rica
tion
Pro
duct
Des
ign
Pro
cess
De
sign
Fab
rica
tion
Technology
(Source: Everett, J.G. and Slocum, A.H. , 1994. “Automation and Robotics Opportunities: Construction versus Manufacturing.” Journal of Construction Engineering and Management, ASCE, Vol. 120, No. 2, pp. 443-452).
Benefits of DfCSBenefits of DfCS Safer jobsitesSafer jobsites
Safety hazards eliminated/reducedSafety hazards eliminated/reduced Fewer injuries and fatalitiesFewer injuries and fatalities
Reduced workers’ compensation premiumsReduced workers’ compensation premiums Increased productivity and qualityIncreased productivity and quality Fewer delays related to accidents during Fewer delays related to accidents during
constructionconstruction Allows for continued focus on qualityAllows for continued focus on quality
Designer-constructor collaborationDesigner-constructor collaboration
Challenges/Barriers to DfCSChallenges/Barriers to DfCS Change in project team mindsetChange in project team mindset
CollaborationCollaboration Upfront involvement of all Upfront involvement of all
stakeholdersstakeholders Contracting:Contracting:
Revised model contractsRevised model contracts Alternative contracting methodsAlternative contracting methods
Availability of visualization and Availability of visualization and work flow toolswork flow tools
Education and training:Education and training: From separate to integratedFrom separate to integrated
DfCS Research StudyDfCS Research Study
Response# of
Respondents
% of Respondent
s
Interested / Willing 7 37%
Neutral 9 47%
Not interested / Not willing 3 16%
Designer willingness to design for safetyDesigner willingness to design for safety
(Source: Gambatese, Behm, and Hinze, 2005)
DfCS Research StudyDfCS Research Study
Barrier # of Times Mentioned
% of Respondents
Interferes with the constructor’s means and methods 7 37%
Increased liability 5 26%
Designers have limited or no construction experience 4 21%
Time constraints; “Have enough to deal with” 4 21%
No control over who gets the bid 4 21%
Barriers to designing for safetyBarriers to designing for safety
(Source: Gambatese, Behm, and Hinze, 2005)
DfCS Research StudyDfCS Research Study
1.5
2.1
2.7
3.84.2
5.7
0
1
2
3
4
5
6
AverageRank*
Qu
ality
Fin
al
oc
cu
pa
nt
sa
fety
Pro
jec
t c
os
t
Pro
jec
t
sc
he
du
le
Ae
sth
eti
cs
Co
ns
tru
cti
on
wo
rke
r
sa
fety
*Ranking:1 = Highest priority6 = Lowest priorityA smaller number represents higher priority.
Priority of project criteriaPriority of project criteria
(Source: Gambatese, Behm, and Hinze, 2005)
Expected Impacts: “Trajectories”Expected Impacts: “Trajectories” Increased prefabricationIncreased prefabrication Increased use of less hazardous Increased use of less hazardous
materials and systemsmaterials and systems Increased construction engineeringIncreased construction engineering Increased spatial investigationIncreased spatial investigation Increased collaboration and Increased collaboration and
integrationintegration(Source: Toole, T.M. and Gambatese, J.A., 2008. “The Trajectories of Prevention through Design in Construction.” Journal of Safety Research, Special issue on Prevention through Design, Elsevier and the National Safety Council, 39, 225-230).
Designers need knowledge of construction safety Designers need knowledge of construction safety and construction processesand construction processes More safety in architectural and engineering curriculaMore safety in architectural and engineering curricula Engineering licensure requirementsEngineering licensure requirements
Designers need to become better gatherers and Designers need to become better gatherers and communicators of project safety informationcommunicators of project safety information For example: existing site utilities, availability of For example: existing site utilities, availability of
prefabricated components, likely methods to be used, prefabricated components, likely methods to be used, working clearances.working clearances.
ImplicationsImplications
Implications for Education of Implications for Education of Design EngineersDesign Engineers
Shift in mindsetShift in mindset Holistic viewHolistic view Exposure to DfCS fundamentalsExposure to DfCS fundamentals Training in system-specific DfCS Training in system-specific DfCS
opportunitiesopportunities Engineering course-specific DfCS Engineering course-specific DfCS
modulesmodules
Implications for ContractingImplications for Contracting
New contract terms neededNew contract terms needed Design-bid-build process typically hinders Design-bid-build process typically hinders
collaboration during designcollaboration during design Integrated Project Delivery (IPD) methods Integrated Project Delivery (IPD) methods
better facilitate collaborationbetter facilitate collaboration
Implications for Use of Implications for Use of Information TechnologyInformation Technology
IT represents efficient means for providing IT represents efficient means for providing designers with information needed to designers with information needed to perform DfCSperform DfCS
Manufacturers must make DfCS Manufacturers must make DfCS information availableinformation available
All entities will need IT to facilitate All entities will need IT to facilitate communication, collaboration, integrationcommunication, collaboration, integration
DfCS ResourcesDfCS Resources Construction Industry Institute (CII) databaseConstruction Industry Institute (CII) database
www.construction-www.construction-institute.org/scriptcontent/more/rr101_11_more.cfm institute.org/scriptcontent/more/rr101_11_more.cfm
CHAIRCHAIRwww.workcover.nsw.gov.au/Publications/OHS/SafetyGuidwww.workcover.nsw.gov.au/Publications/OHS/SafetyGuides/chairsafetyindesigntool.htmes/chairsafetyindesigntool.htm
United Kingdom Health & Safety Executive design United Kingdom Health & Safety Executive design guidesguides
www.hse.gov.uk/construction/designers/index.htmwww.hse.gov.uk/construction/designers/index.htm Detailing Guide for the Enhancement of Erection Detailing Guide for the Enhancement of Erection
SafetySafety (NISD/SEAA): (NISD/SEAA): www.seaa.net/store/product_info.htmwww.seaa.net/store/product_info.htm
DfCS website: DfCS website: www.designforconstructionsafety.orgwww.designforconstructionsafety.org
Thanks for ListeningThanks for Listening
Questions? Comments?Questions? Comments?
For more information:For more information: [email protected]@oregonstate.edu