3. GuidelinesFS-HDPE-Trail - Markers.docx

Sign and Poster Guidelines for the Forest Service Chapter 14 Manufacturing Specifications

14.4 Routed Signs

14.4.1 Description

All materials, labor, tools, equipment, and supplies used to manufacture routed signs as well as their packaging and shipment to the designated destination must comply with this specification, drawings, and other specifics of the requisition. Workmanship shall be high quality with no visible defects in the finished product.

High-density polyethylene (HDPE or recycled plastic)—This nonbiodegradable plastic is extremely durable and requires little or no maintenance. It will not crack, warp, oxidize, rust, break, or suffer UV deterioration. It withstands temperatures as low as minus 40 degrees Fahrenheit and repels graffiti. It has some flexible characteristics and may require metal or wood reinforcement for proper support. Follow manufacturers recommendations for proper mounting, maintenance, and repair.

Up to three layers of polyethylene are bonded through an extrusion process called "A/B/A" format. The surface "A" is one color with a contrasting core "B" underneath. The surface can be routed to expose the core color underneath or the surface material around the legend can be routed away leaving a raised surface in the "A" color. The HDPE sheets consist of a 1/8-inch top layer, a ½-inch middle core layer, and a 1/8-inch bottom layer. The combination of layers shall provide a unified ¾-inch thick panel free of any jointing, unless requested for oversized signs. The material is produced in solid sheets that is 5 feet by 10 feet by ¾-inch thick.

14.4.3 Adhesive

The adhesive (glue) shall be phenolic resorcinol, moisture resistant in accordance with Federal Specification MMM-A-181C.

14.4.4 Hardware

All hardware (such as screws, bolts, and washers) shall be zinc plated.

14.4.5 Primer, Paint, and Stain

Primer—Primer shall be top-quality and oil-based conforming to Federal Specification TT-P-25.

Paint—Paint shall be top-quality exterior acrylic (high-acrylic) latex enamel conforming to Federal Specification TT-P-19. Unless shown otherwise in drawings, colors shall be Federal Standard 595, as follows:

System (PMS)

These lists are not all-inclusive; drawings may specify other colors. The five-digit numbering system used for the colors is based on the assignment of numerals, which indicate the following:

1. The first digit indicates the category of finish; 1-full gloss; 2-semigloss; 3-lusterless (flat).

2. The second digit indicates the selected color classification group.

3. The last three digits indicate the approximate order of increasing (diffuse) reflectance.

Stain-Stain shall be semitransparent, oil based. The final product shall match the following colors:

Gray stain. Gray stain shall match Federal Standard 595, No. 36357.

Brown stain. Brown stain shall match Federal Standard 595, No. 20059.