Replicating Bronze Hardware

CSI Division
Division 8 - Openings
Section
Hardware
Last Modified


 

  • REPLICATING BRONZE HARDWARE


     
  • PART 1–GENERAL

     
  • 1.01 SUMMARY

     
  • A. This procedure includes guidance on replicating missing
     
  • or irreparably damaged bronze hardware at historic
     
  • buildings. The Contractor will fabricate custom castings
     
  • by making molds from existing, original pieces, or when
     
  • no original exists, from original drawings or photographs.
     
  • The more detailed the documentation, the better.

     
  • B. To get an estimate for replication, provide the
     
  • fabricator with close-up photographs and/or drawings
     
  • showing front and side views of the element(s), exact
     
  • dimensions, and any complex detailing. Ideally, a 35mm
     
  • camera, macro lens, and slow exposure should be used.
     
  • Architect/Engineering firms can be contacted to provide
     
  • photographs if your office does not have the needed
     
  • equipment. Provide a list of the quantity of each element
     
  • needed, since it will determine the unit cost.

     
  • C. See 01100-07-S for general project guidelines to be
     
  • reviewed along with this procedure. These guidelines
     
  • cover the following sections:

     
  • 1. Safety Precautions

     
  • 2. Historic Structures Precautions

     
  • 3. Submittals

     
  • 4. Quality Assurance

     
  • 5. Delivery, Storage and Handling

     
  • 6. Project/Site Conditions

     
  • 7. Sequencing and Scheduling

     
  • 8. General Protection (Surface and Surrounding)

     
  • These guidelines should be reviewed prior to performing
     
  • this procedure and should be followed, when applicable,
     
  • along with recommendations from the Regional Historic
     
  • Preservation Officer (RHPO). 

     
  • 1.02 SUBMITTALS

     
  • A. Samples: Submit one sample of each unique casting for
     
  • approval by Contracting Officer’s representative prior to
     
  • proceeding with fabrication remaining elements listed in
     

  • scope of work.


     

     

    PART 2–PRODUCTS

    2.01 MANUFACTURERS

    A. Ball and Ball www.ballandball-us.com

    D. Conant Metal & Light www.conantmetalandlight.com

    E. Brian F. Leo

    (Also provides custom castings in aluminum, steel and other alloys)



     

  • PART 3–EXECUTION

     
  • 3.01 ERECTION, INSTALLATION, APPLICATION

     
  • A. Design Requirements: Replace missing hardware with
     
  • replicas to match originals. Design(s) to be taken from:

     
  • 1. Existing original hardware.

     
  • 2. Original construction drawings.

     
  • 3. Photographs of original hardware.

     
  • B. New elements must match originals in all respects,
     
  • including form, material, finish, and fineness of detail.
     
  • Use the casting and finishing methods which produce the
     
  • highest quality of detail. Sand casting is acceptable for
     
  • large, flat elements such as exterior grilles. Lost wax
     
  • casting (also known as ‘investment’ casting or ‘ceramic
     
  • shell’ casting) is required for finely detailed
     
  • ornamental hardware.

     
  • C. The artisan is responsible for shrink factoring so that
     
  • the replacement element matches the dimensions of the
     
  • original.

     
  • D. If no original elements exist, and original drawings or
     
  • specifications indicating the originally intended finish
     
  • are not available, fabricate new hardware to match the
     
  • original finish (color, texture, sheen) of other original
     

  • hardware in the building.


     

     

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Last updated: Sep 30, 2024
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