7. 8. 9. Tyvek. A fibrous, paper-like material that has good short-term resistance to inclement weather and to animal damage. Very flexible and light. Easily stapled to wood. Cardboard.-A paper product that degrades quickly in inclement weather. Accepts paint (silk screening) well, depending on the slickness of the surface. Easily nailed or stapled. Used primarily for seasonal posters. Porcelain Enamel on Steel.-This material is highly resistant to scratches, impacts, and weathering. Most often used on interpretive signs, it offers a very appealing appearance, but at a high initial and replacement cost. It lends itself well to the use of graphics. While expensive, it has a lifetime of 20 years or more. 10. Fiberglass Embedment.—In this process, a paper image is embedded in a fiberglass/epoxy-resin panel. Preparation of the first paper image is initially a high cost. Second, third, and subsequent copies can be quickly and cheaply made at the time of the original and put aside for later embedment at relatively low cost to replace a damaged or stolen original. The fiberglass resists scratching, impact, and weathering very well. 11. Metal.-Engraved or acid etched metals, aluminum, and stainless steel are often used for signs. Such signs have a long service life, are generally good or very good in their resistance to weather, and fair or poor in their resistance to scratching or impact. Initial cost is generally medium to high, as is the replacement cost. 12. Redwood.-Routed redwood signs have been a Reclamation standard for a long time. These types of signs are expensive because of the high material and fabrication costs. 13. High-Density Foam Boards.-Three-dimensional signs made by cutting a matte and sandblasting to the desired depth. Sand blasting and mattes can also be used to make three-dimensional wood signs from 2-inch-thick material. S. Manufactured Signs: Specifications for premanufactured signs should be followed per manufacturer's instructions, regardless of the procurement source. Chapter VI SPECIFIC DESIGN GUIDELINES Design Type A,: Identification sign. A. 1. 2. 3. 4. 5. 6. 7. Shape.-Extended oval (see example). Sign Board Size.—Varies according to length of message and speed of observer. Sign Board Material.-Two-inch dimension redwood laminated on edge, 3/4-inch Sign Board Fabrication.-Whenever signs with glue laminated joints are Sign Face.-Scotchcal, or equivalent, film or polysilicone base paint. The blue portion should be Pantone 2905U, or equivalent. The brown portion, if redwood, should be stained with Olympic Stain 707, or equivalent. The border should be stained with Sherwin Williams, solid stain, Spice Wood, B42N15, or equivalent. If the sign board material is MDO, the brown portion should be Pantone 469U, or equivalent. The border should be painted with Pantone 4695U, or equivalent. Sign Base. No standard designs. It is recommended that materials found naturally around the site be repeated in the base. If the sign is identifying a structure or office building, it should match those materials used in the construction, if suitable. Method of Anchoring Sign.-Wood or steel posts bolted or set in concrete. Use of vandal-proof nuts is encouraged. 8. Lettering.-Lettering can be of Scotchlite film, or equivalent, routed or flat, and painted or painted with a silk screen. Black letters should be Pantone 532U, or equivalent. White letters should be Pratt and Lambert, Pantone 607U, or equivalent. Letter size should be determined from information contained in chapter V. NOTE: The graphic examples in this chapter use either blue (Pantone Color Matching System |