FEBRUARY 6 2003
12.21.1. Aluminum. Aluminum used for concealed framing of signs shall be 6063-T5 alloy with
mill finish in accordance with ASTM-B221. Aluminum used for all exposed surfaces shall have
a clear or dark bronze anodized finish and shall be alloy 6063-T5 or other alloy recommended by
the Aluminum Company of America, Kaiser Aluminum, Reynolds Aluminum or equivalent
manufacturers to produce the required finish.
184.108.40.206. Aluminum shall be given a pre-anodic etched AA C22 treatment, followed by an
anodic oxide coating in strict accordance with manufacturers' specifications for color
anodized finishes. The coating shall have a minimum thickness of .007 inches.
220.127.116.11. Welded joints shall be heliarc welded in conformance with the American Welding
Society and the Aluminum Association's specifications.
12.21.2. Metal Fasteners. All exposed metal fasteners shall be hardened aluminum ASTM-B211
12.21.3. Vinyl. Vinyl sheeting for die-cut graphics shall have a .003 to .006 film thickness and
shall conform to Military specifications M43719A. The sheeting shall include a pre-coated
pressure sensitive adhesive backing (Class 3). The changeable letter boards for the building
directories shall be pre-slotted, non-fading, washable vinyl, 5 mm to 6 mm 3/16" to " thick.
12.21.4. Glass. Glass shall be polished clear plate glass with clean cut edges conforming to
Federal Specification DD-G- 451a. All glazing work shall be performed in accordance with
applicable Standards of the Flat Glass Jobbers Association Glazing Manual.
12.21.5. Plastic. All acrylic plastics used for particular applications shown on the drawings shall
be of new stock, free from defects and of the best quality available. Interior signs should
complement interior architecture and color schemes. Standard blue or any dark color appropriate
to the interior environment of the specific building may be used.
12.21.6. Adhesives. All adhesives and adhesive tapes required for plastics, glass and metals shall
be of a type recommended for the particular usage by the manufacturer and guaranteed to meet
the general and structural support criteria shown on the drawings.
12.21.7. Cork. Cork shall have a plastic impregnated surface and burlap backing. The cork shall
have a smooth surface finish free from air pockets, raised cork blemishes and joint
12.21.8. Paints and Inks. Paints and inks shall be products which are qualified for inclusion on
the applicable GSA Qualified Products List. The colors should complement interior architecture
and color schemes.
18.104.22.168. Qualified alkyd, acrylic, epoxy or urethane enamels may be used. Prime coats and