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Historic Preservation - Technical Procedures

Spectitle:
Repairing Holes And Larger Cracks In Pigmented Structural Glass Panels

Procedure code:
0881003R

Source:
National Capitol Region Specifications - Justice Building

Division:
Doors And Windows

Section:
Glass

Last Modified:
02/24/2012

Details:
Repairing Holes And Larger Cracks In Pigmented Structural Glass Panels



REPAIRING HOLES AND LARGE CRACKS IN PIGMENTED STRUCTURAL GLASS
PANELS


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on patching holes in
         pigmented structural glass partitions using a polyester
         resin.

    B.   See also 08810-01-R, 08810-01-S and 08810-02-R for
         additional guidance on the preservation of pigmented
         structural glass panels.

    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).  


PART 2---PRODUCTS

2.01 MANUFACTURERS

    A.   Akemi Plastics, Inc.
         Eaton Rapids, MI

2.02 MATERIALS

    A.   Patching Material: Polyester resin adhesive which can be
         tinted to match the surrounding glass, such as "Akemi
         Transparent Knife Grade" (Akemi Plastics, Inc.), or
         approved equal.

    B.   Pigment: Coloring agent compatible with adhesive and
         patching material and recommended by adhesive
         manufacturer, such as "Akemi Coloring Paste Iron Oxide"
         (Akemi Plastics, Inc.), or approved equal.

    C.   Polish: Fluid for polishing patching areas recommended by
         adhesive manufacturer, such as "Akemi Polishing Fluid"
         (Akemi Plastics, Inc.), or approved equal.


PART 3---EXECUTION

3.01 ERECTION, INSTALLATION, APPLICATION

    A.   Fill all holes and cracks larger than 1/8" with polyester
         resin adhesive.

    B.   Match the dry color of the filler to the color of the
         immediate surrounding clean material, using the
         manufacturer's recommended materials.

    C.   Smooth the surface of the patch level with the
         surrounding material. Do not allow filler to extend over
         the surface of the surrounding material. Remove all
         excess immediately.

    D.   Polish: After all repair, replacement, and cleaning,
         polish with 400 grit wet or dry sandpaper and buff with
         polish, following manufacturer's instructions.

                         END OF SECTION