ESBD_566778_1791570764698_4_Attachment F 304T-27-801A3 TXDOT DMS_7110.pdf
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- Attached to
- Aluminum Sign Blanks
- Solicitation number
- 304T-27-801A3
- Issued by
- Texas
About this file
This is a Departmental Materials Specification document issued by the Texas Department of Transportation (TxDOT) Materials and Tests Division, effective August 2023, establishing requirements for aluminum sign blanks used in state signage projects. The specification governs the furnishing of aluminum substrates for signs, including aluminum sheet or coil and extruded sign panels. The document outlines material requirements for aluminum sheet or coil conforming to ASTM B209 standards in Alloys 6061-T-6 or 5052-H38, requiring that sign blanks be free of buckles, warps, dents, cockles, burrs, and other defects and maintain a plane surface. Additionally, aluminum extrusions must comply with ASTM B221 standards using Alloys 6061 or 6063 in T4 or T6 temper, with railroad crossbuck sign panels specifically requiring T6 temper. All materials must be treated with a chemical process resulting in a light-colored, tight coating meeting ASTM B449 or ASTM B921 Class 2 standards and free from powdery residues.
Suppliers must furnish mill test reports with each shipment obtained from the manufacturer, documenting the chemical and physical properties of the aluminum to demonstrate compliance with specification requirements. The Department reserves the right to conduct periodic sampling and testing of materials, with Department representatives authorized to sample material directly from the sign fabricator's plant. Material sampling and testing must be conducted in accordance with Tex-721-I procedures. The specification remains in effect with a review date of August 2023, and archived versions of previous specifications are available for reference.
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Text version
Departmental Materials Specification
Materials and Tests Division 1 – 1 Effective Date: August 2023
Review Date: August 2023
DMS-7110
Aluminum Sign Blanks Effective Date: August 2023
1. DESCRIPTION
This Specification governs the furnishing of aluminum substrates for signs, including aluminum sheet or coil and extruded sign panels.
2. SAMPLING AND TESTING
Aluminum sheet or coil, and extrusions must conform to this Specification unless otherwise specified by the plans. Sample the material in accordance with Tex-721-I.
3. PERIODIC EVALUATION
The Department reserves the right to conduct sampling of materials for testing. Department representatives may sample material from the sign fabricator’s plant.
4. MATERIAL REQUIREMENTS
4.1. Aluminum Sheet or Coil. Aluminum sheet or coil must be in accordance with the requirements of ASTM B209, Alloys 6061-T-6, or 5052-H38.
Sign blanks made from sheet or coil must be free of buckles, warps, dents, cockles, burrs, and other defects and must be a plane surface.
Treat all sign blanks fabricated from sheet and coil with a chemical process resulting in a coating meeting the requirements of ASTM B449, Class 2, or ASTM B921, Class 2. The coating must be light-colored, tight, and free from powdery residues.
4.2. Aluminum Extrusions. Aluminum signs (Types G and O) must be in accordance with ASTM B221, Alloys 6061 or 6063, and T4 or T6 temper.
Railroad crossbuck sign panels must be in accordance with ASTM B221, Alloys 6061 or 6063, and T6 temper.
4.3. Documentation. Furnish mill test reports with each shipment, obtained from the manufacturer, for aluminum sheet or coil and for extrusions that reflect the chemical and physical properties of the aluminum.
5. ARCHIVED VERSIONS
Archived versions are available.
Attachment F 304T-27-801A3 Aluminum Sign Blanks chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https:/ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/700-I_series/pdfs/str721.pdf
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