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Deconstruction

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					     Deconstruction:
A Local Government Model

            Wayne Fenton
     Orange County Public Works,
          Hillsborough, NC
     What is Deconstruction?
• Deconstruction is the       • Deconstruction differs
  process of selectively        from recycling in that
  and systematically            recycling does not seek
  disassembling buildings       to capture building
  that would otherwise be       materials in a reusable
  demolished to generate        form (i.e., whole bricks,
  a supply of materials         blocks, clean, unbroken
  suitable for reuse in the     pieces of lumber, etc.)
  construction or
  rehabilitation of other
  structures.
          A Brief History
• Orange County owns 34 buildings
• Buildings range in age from pre-
  Revolutionary war to modern structures
    The Building




Approximately 3,000 square feet
         The Experiment
• A 1920’s/1950’s mixed construction
  structure housing a sheltered workshop
• Building located in heart of historic
  district
• Sat vacant for several years after
  suffering severe storm damage
• Options considered
            The Process
• Project approved by BOCC
• Purchasing Dep’t persuaded
• Bid-process tailored
• Seasoned local deconstruction
  specialists hired
• Process documented
   Desired Project Outcomes
• Removal of unsafe        • Provide skills
  structure                  enhancement
• Capture of valuable        opportunities
  materials, especially    • Document the
  for use in other           process:
  similar vintage            – To develop
  structures                   promotional video
• Demonstrate                – To develop basic
                               “how-to” video
  feasibility of process
       Materials Recovered
• 39+ tons of building materials
  recovered for reuse through
  deconstruction
      Recovered Materials
   BRICK      CONCRETE     DIMENSIONAL
               BLOCKS        FRAMING
                             LUMBER
OAK TONGUE & PINE TONGUE     WINDOWS
   GROOVE     & GROOVE
  FLOORING    FLOORING
   DOORS     WOOD SIDING    PINE WALL
                            PANELING
       Materials Recycled
• 6 tons of metal
• 1 ton of white goods
• 140 tons of concrete
         Waste Generated
• Less than 100 tons of waste generated
  by deconstruction required disposal
• Primarily rotted wood, mixed
  composition items, sheetrock, shingles
Benefits of Deconstruction
              Economic
• Cost of deconstruction can be less than
  cost of demolition
• Salvaged materials have a value
• Cost avoidance in tipping fees
• Preservation of landfill space
• Job-skills training
          Environmental
• Preservation of landfill space
• Resource conservation
• Deconstruction a cleaner technology
  than demolition – less noise, air
  pollution
             Educational
• Governments should lead by example
• Act as a catalyst to contractors, facility
  owners/managers
• Be a model for other governments
            Cost Benefit Analysis
Demolition Costs           Deconstruction Costs
• Estimate:                • Actual Expenditures:
  $50,000                    $37,929

                           Savings
                           • Salvaged Materials Value:
                             $37,130*
                           • Landfill Fees Avoided:
                             $1,600
    * Based on local vendor estimate
        Measuring Success
• Structure            • Provided temporary
  successfully and       workers with
  safely removed         enhanced skills –
• Some materials have    two hired by County,
  been reused in other   one still employed
  projects
                       • Promotional video
• Demonstrated
  feasibility of         complete & limited
  deconstruction         distribution
  option
              The Video
• High quality, low
  budget
• 16 minutes running
  time

				
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posted:7/31/2011
language:English
pages:18