715Galvanizing

715.01.01 Material Covered. This specification covers the quality and thickness of galvanizing used on various

material. PHYSICAL PROPERTIES AND TESTS

715.03.01 Iron and Steel Products 3 mm (1/8 in.) Thick and Thicker. Galvanizing of products fabricated

from rolled, pressed, and forged iron and steel shapes, castings, plates, bars, and strips shall conform to ASTM A123.

715.03.02 Hardware. Galvanizing of bolts, nuts, washers, and fastenings shall conform to ASTM A153.

715.03.03 Mechanical Galvanizing. In lieu of hot -dipped galvanizing as specified in these specifications,

ferrous metals may be mechanically galvanized according to ASTM B695. Regardless of the method chosen, the coated product shall conform to the coating thickness, adherence, and quality requirements of AASHTO M232.

715.03.04 Repair of Damaged Galvanizing. Material and procedures for repair of damaged galvanizing shall

conform to ASTM A780. SECTION 716 SIGN MATERIALS SCOPE

716.01.01 Materials Covered. This specification covers the kind and quality of materials used in the

construction and fabrication of signs. REQUIREMENTS

716.02.01 Certificates. Ascertain that all required tests have been made by approved testing laboratories as

approved. Furnish a written certification that all required tests have been satisfactorily completed and that materials and fabrication thereof c omply with all the requirements. Receive approval of materials before use. PHYSICAL PROPERTIES AND TESTS

716.03.01 Reflective Sheeting. Reflective or retroreflective sheeting is classified as specified herein.

Use sheeting listed in the QPL.

716.03.02 Fiberglass Reinforced Plastic Sign Panels. Fiberglass Reinforced P lastic (FRP) for sign panels

shall be a fiberglass reinforced thermoset polyester laminate. The panel shall be acrylic modified and U.V. stabilized for outdoor weatherability. Fabricate sign blanks of a single piece of FRP unless otherwise specified. Cut FRP to proper sign blank size and provide bolt holes. Make edges, including holes, true and smooth. The panel shall be stabilized to prevent the release of migrating constituents (i.e. solvent, monomers, etc.) over time and shall contain no residue agents on the surface so that neither migrating constituents nor release agents will be present in amounts that will interfere with any subsequent bonding operations. Wipe the panel with a clean damp cloth and allow to dry completely before sheeting. The panel shall not contain visible cracks, pinholes, foreign inclusions, or surface wrinkles that would affect implied performance, alter the specific dimensions of the panel, or otherwise affect its serviceability. The panel shall conform to the following m echanical properties : Mechanical Property Test Method Averaged Minimum Requirements Tensile Strength ................................ ..... ASTM D638 ................................. 69 MPa (10,000 psi) Tensile Modulus ................................ ..... ASTM D638 ............................ 8,300 MPa (1,200,000 psi) Flexural Strength ................................ ..... ASTM D790 ................................ 138 MPa (20,000 psi) Flexural Modulus ................................ ..... ASTM D790 ............................ 8,300 MPa (1,200,000 psi) Compression Strength ................................ ASTM D695 ................................ 220 MPa (32,000 psi) Compression Modulus ................................ ASTM D695 ............................ 9,650 MPa (1,400,000 psi) Punch Shear ........................................ ASTM D732 ................................ . 90 MPa (13,000 psi) The mechanical properties in the table above are measured in both the line direction of the panel and at 90° to the line as noted in the appropriate ASTM test referenced.