INSTALLING A NETTING BIRD DETERRENT SYSTEM TO PROTECT LARGE AREAS
OF CARVINGS, SCULPTURE AND MOLDINGS


BEFORE PROCEEDING WITH THE WORK IN THIS PROCEDURE, CAREFULLY
REVIEW PROCEDURE 10296-01-S WHICH DESCRIBES THE ADVANTAGES AND
DISADVANTAGES OF THE MOST COMMON TYPES OF BIRD DETERRENT SYSTEMS
USED ON BUILDINGS.  ALL METHODS OF BIRD CONTROL HAVE LIMITED
EFFECTIVENESS, MAKING THE SELECTION OF A SYSTEM DIFFICULT. 
SPECIFIC FACTORS, INCLUDING CLIMATE, BUILDING LOCATION, AND BIRD
SPECIES MUST BE CAREFULLY CONSIDERED IN ORDER TO SELECT THE MOST
APPROPRIATE SYSTEM.  ALL BIRD DETERRENT SYSTEMS ARE TEMPORARY
SOLUTIONS TO A PROBLEM AND, AS SUCH, SHOULD BE INSTALLED IN A
MANNER WHICH IS REVERSIBLE AND DOES NOT DAMAGE THE STRUCTURE OR
MATERIALS DURING INSTALLATION OR REMOVAL.


PART 1---GENERAL

1.01 SUMMARY

     A.   This procedure includes guidance on installing a netting
          bird deterrent system.  This type of system is most
          commonly used to protect large areas of architectural
          detailing, especially carvings, sculpture and moldings. 
          It is usually installed on the upper portions of a
          building, where its presence will not be as apparent. 

     B.   The netting system is designed to prevent birds from
          nesting in recessed portions of the building, in light
          wells, or under eaves by making entry into those areas
          difficult.  Netting can be a desirable solution if hung
          correctly and if an inconspicuous color of netting is
          selected.  It is most suited for large areas, is
          effective on most bird species, and can have a fairly
          long life span.  This system, however, is time consuming
          and expensive to install and can obscure detailing. 
          Furthermore, gaps and holes in the netting will render
          the system ineffective.

     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 a 12" x 12" sample of proposed bird
          netting to the RHPO for approval of color.

     B.   Mock-ups: An area(s) selected by the RHPO will have a
          test installation of bird netting for approval by RHPO 
          prior to beginning of work.

1.03 PROJECT/SITE CONDITIONS

     A.   Do not use adhesive on wet or damp surfaces or when
          temperatures are above 120 degrees F or below 45 degrees
          F.


PART 2---PRODUCTS

2.01 MANUFACTURERS

     A.   ProSoCo, Inc.
          755 Minnesota Avenue
          P.O. Box 1578
          Kansas City,  KS  66117
          800/255-4255 or 913/281-2700

2.02 MATERIALS

     A.   Bird Netting: UV stable, knotted plastic netting in color
          to blend with masonry, such as "Conservare Pigeon
          Control" (ProSoCo, Inc.), or approved equal. 
          Characteristics of netting including color and grade must
          be approved by RHPO.

     B.   Anchors: Stainless steel mounting pins which will not
          rust or cause staining on masonry.

     C.   Adhesive: Epoxy putty; high modulus, high strength, non-
          sag, two-component, epoxy resin adhesive, designed for
          vertical and overhead bonding, moisture insensitive, and
          in color approved by RHPO.

2.03 EQUIPMENT

     A.   Masonry drill

     B.   Hammer


PART 3---EXECUTION

3.01 PREPARATION

     A.   Surface Preparation: Remove all bird excrement, from the
          application area.  See 04510-02-R for guidance. 
          Application must take place after masonry cleaning
          operations are completed, but may be scheduled for work
          while staging is in place.

3.02 ERECTION, INSTALLATION, APPLICATION

     NOTE: OBTAIN APPROVAL FROM RHPO BEFORE PROCEEDING WITH THIS
     WORK.

     A.   Follow manufacturer's printed instructions for netting
          installation.  Area to be protected must be measured
          accurately.

     B.   Mark on perimeter of area to be covered by netting where
          holes are to be drilled.  Mount pins at mortar joints
          where possible.

     C.   Using a 3/16" drill bit, drill holes approximately 8"
          apart, 1-1/2" deep and at a 45 degree angle .  Remove all
          loose particles from the surface.

     D.   Press epoxy putty into holes and set pins into putty.

     E.   Reinforce edges of netting by using a simple weaving
          process with matching plastic thread.

     F.   Stretch netting over area to be protected and attach to
          anchoring pins.  Stretch netting so that the mesh runs
          vertically and horizontally, NOT diagonally.  The netting
          will blend better with the background when stretched in
          a horizontal and vertical direction.

                          END OF SECTION