Skip to main content

Historic Preservation - Technical Procedures

Spectitle:

Replacing Ornamental Bronze Light Fixtures

Procedure code:

1651002R

Source:

National Capitol Region Specifications

Division:

Electrical

Section:

Lighting Fixtures

Last Modified:

02/24/2012

Details:

Replacing Ornamental Bronze Light Fixtures



REPLACING ORNAMENTAL BRONZE LIGHT FIXTURES


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on the replacement of
         missing interior ornamental lighting fixtures to match
         the originals.

    B.   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.   Shop Drawings:  All fixtures are to be reproduced from
         surviving references and surviving example fixtures.
         Fabricators shall be furnished with clean full-size
         drawings produced from existing fixtures.  The lighting
         fixture fabricator shall furnish copies of shop drawings
         for the approval of the Contracting Officer.

    C.   Samples:  Submit a sample of each fixture indicating
         fabricators technique.  


PART 2---PRODUCTS

2.01 MATERIALS

    A.   Metals:

         1.   All exposed parts of fixtures are to be of the
              materials as specified.

         2.   Bronze:  Cast bronze items fabricated from statuary
              bronze alloy and highly polished with no pitting of
              surface.

         3.   If the contractor desires to use alloys in lieu of
              those herein specified, the composition of the
              same, together with finished samples of the metals
              must be submitted to the Contracting Officer.

    B.   Castings:  Patterns for castings shall be iron.  The
         modeling of patterns must be crisp, true to detail and
         uniform in execution.  All details of cast ornamentation
         must be plainly brought out by hand finishing.  Where
         ornaments are made in parts, the joints must be brazed
         and designed so as to cause no break in the
         ornamentation.  All burrs and sharp edges must be removed
         from wire ways.

    C.   Wiring:  Wiring for new fixtures shall utilize existing
         conduits where possible.  Any damage to decorative
         plaster ceilings, cornice or pilasters shall be repaired
         to match existing (see 09200-03-S and 09200-05-R for
         guidance).  Wiring shall conform to the National Electric
         Code.

    D.   Finishes:  The finish of bronze fixtures shall be hand
         finished statuary bronze.  It shall be produced by
         polishing to a bright bronze color and then oxidizing to
         color, directed by the Contracting Officer.


PART 3---EXECUTION

3.01 ERECTION, INSTALLATION, APPLICATION

    A.   Replace missing fixtures identical to surviving original
         examples.  Bronze finish should match the clean finish of
         existing fixtures.

    B.   For guidance on cleaning existing bronze fixtures, see
         16510-02-R.  For guidance on cleaning, polishing, oiling
         and patinating bronze, see 05010-01-R and 05010-22-R.

                         END OF SECTION