Overhead Drilling Project

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Overview

• Overall goal Develop and evaluate interventions
  for reducing upper body musculoskeletal risk
  factors associated with overhead drilling in
  construction settings.
• Phase I Development of devices (N40)
• Phase II Evaluation of 2 devices (N120)
• Phase III Dissemination

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The Team

• David Rempel, M.D., Project Director
• Demetra Dalamagas, Field Coordinator
• Billy Gibbons, Field Coordinator
• Ira Janowitz, Ph.D., Field Coordinator
• Mike Chappelear, Design Partner
• Alan Barr, Ph.D., Design Partner

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Funding

• NIOSH (National Institute of Occupational Safety
  and Health) Grant
• Administered through CPWR (Center to Protect
  Workers Rights)
• University of California, San Francisco
• Portland Field Office

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Union Partners

• IBEW Local 48
• UA Local 290
• SMWIA Local 16

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Participating Companies

• Intel Data Center (Owner)
• University of Washington (Owner)
• Port of Seattle (Owner)
• Skanska Construction (CM)
• JH Kelly Construction (CM, mechanical)
• Turner Construction (CM)
• Layton Construction (CM)
• Oregon Electric Group (Electrical Contractor)
• Rosendin Electric (Electrical Contractor)
• Electric Construction Co (Electrical Contractor)
• Interstate Mechanical (Piping Contractor)
• Temp Control Mechanical (Piping and Sheet metal)
• Streimer Sheetmetal (Sheet metal Contractor)
• ASD (Architectural Contractor)
• Toyota Logisitcs (Cross-discipline partner)

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Project Location

• Commercial construction sites throughout Oregon
  and Washington
• On location during normal overhead drilling
  activities

Project TimeLine

• Development Phase August 2004-July 2005
• Evaluation Phase July 2005-July 2008
• Dissemination Phase 2008-2009

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Phase 1 Development Phase

• Purpose To develop and modify intervention
  device prototypes
• Method Interviews, questionnaires and
  videotaping of electricians, pipe fitters,
  plumbers and sheet metal workers as they test the
  devices during their normal work activity.

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Phase I Recruitment Requirements

• Union Contractors
• Electrical, Sheet metal and Piping trades
• Volunteers must be engaged in drilling overhead
  for a least one full day

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Two Intervention Devices
Foot Lever Drill Press
Inverted Drill Press
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Craftsmen tested each of the two devices in the
field while performing their normal tasks
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Devices were compared to normal overhead drilling
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Diversity of Demographics and Locations
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• Subjects filled out questionnaires
• Determine usability, performance and fatigue
  levels
• Subjective opinions
• Field tech notes
• Videotaping

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Phase I Gen 2 Findings

• What worked
• Good accuracy
• Drilling is faster, set-up is slower
• Easier on the body
• Dust and Noise reduced
• Both devices rated equally
• Most prefer normal drilling for speed and devices
  for effects on body
• Suggestions for Improvements
• Bigger Wheels
• Cord Management
• Change activation switch
• Use Lighter materials
• Make More portable
• Provide a method to level device

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Inverted Drill Press
Gen 1
Gen 2
Gen 3

• Substitute Aluminum for Steel
• On/Off rocker switch exchanged for momentary
  trigger
• Method for leveling device
• 4 double locking castors
• Cord Management
• Modular design

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Gen 1
Gen 2
Inverted Drill Press Close Up of Gears
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Foot Lever Drill Press
Gen 1
Gen 2
Gen 3
The team decided against a third generation of
the foot lever drill press
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Drills and Saddles
Gen 1
Gen 2
Gen 3

• Depth rod added (Positive Stop)
• Coupling post align with drill bit
• Aluminum substituted for steel
• Same drills

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Drill Press Platforms
Platform obsolete with new base designs
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New Base Designs
Collar Base
Rubber Base
Adjustable Castor Base
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Next Steps

• Another 15 -20 field tests to fine tune designs
• Re-design again based on feedback
• Manufacture final design
• Proceed with Phase II Evaluations
• Hand vibration, body posture, muscle fatigue, and
  productivity

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Interested in Participating?

• Contact Demetra Dalamagas
• EHS Research Associate
• Portland Field Office
• 503-715-7959
• demetra_at_itsa.ucsf.edu

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