912.1General Description
This section includes the requirements for aluminum sign blanks and panels, and extruded aluminum sign panels. 912.1.01 Related References
General Provisions 101 through 150.
ASTM B 108 ASTM B 209 (B 209M) ASTM B 221 (B 221M) ASTM B 449 ASTM B 921 ASTM F 467 (F 467M) ASTM F 468 (F 468M) ASTM B 211 (B 211M)
912.2Materials
912.2.01 Aluminum Sign Blanks
shows where the holes are located for each type and size of blank.
TABLE 1—BOLT HOLE LOCATIONS FOR SIGN BLANKS AND PANELS
Size Number of Holes Required and Spacing 24 in. (600 mm) 2 holes, 12 in. (300 mm) from center on diagonal line 30 in. (750 mm) 2 holes, 15 in. (375 mm) from center on diagonal line 36 in. (900 mm) 2 holes, 18 in. (450 mm) from center on diagonal line 48 in. (1200 mm) 4 holes, 2 on each side 15 in. (375 mm) from both vertical and horizontal center line 1748
All sizes to 36 (900 mm) 2 holes, 3 in. (75 mm) from edge in center of opposite sides 36 in. (900 mm) 2 holes, 6 in. (150 mm) from edge in center of opposite sides NOTE: Drill or punch 24 in. (600 mm), 30 in. (750 mm), and 36 in. (900 mm) diamond and square blanks for use as either type.
Up to 48 in. x up to 15 in. (1200 mm x up to 375 mm) 4 holes, 1.5 in. (38 mm) from the edge in the center of each side Up to 48 in. x 18 – 24 in. (1200 mm x 450 - 600 mm) 4 holes, 3 in. (75 mm) from the edge in the center of each side 36 (900) x 48 in. (1200 mm) 4 holes, 6 in. (150 mm) from edge at 6 in. (150 mm) from top and bottom edges 48 x 36 in. (1200 x 900 mm) and 48 x 60 in. (1200 x 1500 mm) 4 holes, 9 in. (225 mm) from edge at 6 in. (150 mm) from top and bottom edges Over 48 x 12 in. (1200 x 300 mm) 4 holes, 1/6 horizontal dimension from edge at 1.5 in. (38 mm) from top and bottom edges Over 48 x 24 in. (1200 x 600 mm) 4 holes, 1/6 horizontal dimension from edge at 3 in. (75 mm) from top and bottom edges Over 48 x over 36 in. (1200 x over 900 mm) 4 holes, 1/6 horizontal dimension from edge at 6 in. (150 mm) from top and bottom edges
30 x 30 in. (750 x 750 mm) and 36 x 36 (900 x 900 mm) 2 holes, 3 in. (75 mm) from edge on vertical center line 48 x 48 in. (1200 x 1200 mm) 4 holes, 2 on each side, 15 in. (375 mm) from both vertical and horizontal center lines
36 in. (900 mm) 2 holes on vertical center line, spaced 3 in. (75 mm) and 24 in. (600 mm) from the top 48 in. (1200 mm) 2 holes on vertical center line, spaced 4 in. (100 mm) and 28 in. (700 mm) from the top 60 in. (1500 mm) 4 holes, 2 each 15 in. (375 mm) from vertical center line, 3 in. (75 mm) and 21 in (525 mm) from top 1749
30 in. (750 mm)Diameter 2 holes on vertical center line 12 in. (300 mm) from center 36 in. (900 mm) Diameter 2 holes on vertical center line 15 in. (375 mm) from center
24 x 24 in. (600 x 600 mm) and 30 x 24 in. (750 x 600 mm) 2 holes on vertical center line spaced 3 in. (75 mm) and 21 in. (525 mm) from top 36 x 36 in. (900 x 900 mm) and 45 x 36 in. (1125 x 900 mm) 2 holes on vertical center line spaced 6 in. (150 mm) and 30 in. (750 mm) from top
30 x 40 x 40 in. (750 x 1000 x 1000 mm) 2 holes, each 12 in. (300 mm) from left edge, 7.5 in. (188 mm) from horizontal center line 36 x 48 x 48 in. (900 x 1200 x 1200 mm) 2 holes, each 15 in. (375 mm) from left edge, 9 in. (225 mm) from horizontal center line
30 in. (750 mm) 2 holes on vertical centerline, spaced 3 in. (75 mm) and 24 in. (600 mm) from bottom edge 36 in. (900 mm) 2 holes on vertical centerline, spaced 3 in. (75 mm) and 27 in. (675 mm) from bottom edge
and applying the face material.
burrs, and defects resulting from fabrication.
Use conversion coating or anodizing to finish the metal before painting or applying the reflective sheeting.
stains.
1) Begin cleaning with an etch-type alkaline cleaner or with a vapor degreaser, using a trichloroethylene or perchloroethylene solvent. 2) Use the cleaner according to the manufacturer’s specifications. 3) After using an alkaline etching cleaner, treat the metal with an acid solution or desmutting compound. Use the desmutting agent according to the manufacturer’s specifications.
with a chromic acid anodizing solution. Use the conversion coating compound according to the manufacturer’s specifications. 1750
finishing operations and before applying the finish material. Be sure that the metal never comes in contact with greases, oils, dust, or other contaminants before you apply the finish material.
The Department will accept the sign blanks based on results of chemical and physical tests on the materials, approval of methods and procedures for metal treatment, and acceptable quality of work of the finished blank.
General Provisions 101 through 150. 912.2.02 Extruded Aluminum Sign Panels
Ensure that the accessories for fabricating the signs meet the following:
(6G threads), and 3/4 in. (19 mm) long. Use bolts that meet the requirements of ASTM F 468 (F 468M), Alloy 2024-T4.
467M), Alloy 6061-T6.
1-3/4 in. (44 mm) long, and meet the requirements of ASTM F 468 (F 468M), Alloy 2024-T4.
Ensure that the sections are within the established commercial tolerances of the aluminum industry.
sections only at the top of signs that do not conform to 1 ft. (300 mm) modules.
sections as the normal sign panel.
suitable to use hardware, as shown on the plans, obtain written approval from the Engineer.
The Department will accept these sign panels based on results of chemical and physical tests of materials, approval of methods and procedures for metal treatment, and the quality of workmanship on the finished panel. 1751
General Provisions 101 through 150. 1752
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