Oregon 2024 Standard Specifications for Construction — Section 02910

02910.00 1144 Illumination and Traffic Control Materials

Description

02910.00Scope - This Section includes the requirements for backing, sheeting, legend, reflectors,

and hardware for sign installations. This Section also includes the requirements for anti -graffiti coating.

Materials

02910.10Aluminum - The aluminum Materials shall be new and conform to the following

requirements:

Aluminum Bars or Rods ................................................................... ASTM B211 Aluminum Sand Castings ................................................................... ASTM B26 Aluminum Sheet ............................................................................... ASTM B209 Extruded Aluminum Shapes ............................................................. ASTM B221 Rolled or Extruded Structural Shapes .............................................. ASTM B308 Aluminum to be color coated shall be of an alloy which is compatible with the coating and the application process. The color -coated aluminum shall have a temper that, after coating and aging, provides an ultimate strength of 30,000 psi and a yield strength of 25,000 psi.

Fabricate sheet aluminum signs from aluminum alloy 6061- T6, 5052-H38 , 5154-H38, or approved equal. Give a chromate treatment conforming to ASTM B449, Class 2 or a titanium -based coating according to ASTM B921 . Provide certified test reports for all heats of aluminum products furnished to the Agency. Signs shall be of the thickness shown on Table 02910- 1 unless otherwise indicated.

Table 02910-1 Sign Width Sheet Aluminum (Horizontal Measure) Thickness Less than 20" 0.063" 20" through 30" 0.080" 31" through 48" 0.100" Over 48" 0.125"

02910.11Plywood :

(a)General - Construct all plywood signs for permanent signing from 3/4 inch high-density overlay

plywood. Construct plywood signs for temporary signs from either 3/4 inch high- density overlay plywood or 3/4 inch medium -density overlay plywood. Plywood shall be Douglas fir plywood, Grade B-B exterior or better, conforming to Product Standard PS -1 for Douglas Fir Plywood published by the U. S. Department of Commerce.

(b)Overlay - High-density and medium -density overlay shall be black or buff unless otherwise

shown or specified. High- density and medium -density overlay shall conform to Product Standard PS-1 for Douglas Fir Plywood.

(c)Plywood Sealer - Fill all voids in top or sides of panel with caulking c ompound after cutting

plywood to size. Apply an approved plywood edge sealer tinted to match the color of the panel overlay material. The sealer shall be a medium oil alkyd primer. 02910.32 1145

02910.20Retroreflective Sheeting :

(a)General - Use retroreflective sheeting from the QPL and the following:

(1)Perforation - If required for application, the sheeting may be pre -perforated with holes not

greater than 0.02 inch in diameter. The perforations shall be approximately 0.4 inch apart in rows approximately 1.5 inches apart.

(2)Surface - The sheeting and adhesive shall be compatible with non-reflective permanent

cut-out legend.

(b)Acceptance - Furnish a quality compliance certification according to 00165.35, certifying that

the reflective sheeting furnished meets the above requirements.

02910.21Nonreflective Sheeting for Sign Background :

(a)General - The nonreflective sheeting shall be durable, weather resistant, gloss plastic film, and

shall have a protected, precoated adhesive backing.

(b)Color - Color of the nonreflective sheeting shall conform to 00940.10 . Submit for testing

a 4 inch by 4 inch sample of the background color for each color of nonreflective sheeting shown.

(c)Adhesive - Adhere the nonreflective sheeti ng by a mildew and vandal resistant precoated

adhesive that has no staining effect on the sheeting.

(d)Film:

(1)General - The nonreflective sheeting shall be flexible and easily cut to shape. The minimum

tensile strength of the sheeting shall be 5 pounds per inch width.

(2)Surface - The sheeting surface shall be smooth and flat, to facilitate cleaning and wet

performance. The sheeting surface shall be readily processed and compatible with recommended transparent and opaque process inks.

The sheeting shall permit cutting and color processing at minimum temperatures of 60 °F. The sheeting shall be heat resistant and shall permit force curing of applied sheeting at temperatures up to 150 °F. The sheeting surfaces hall be solvent resistant. Clean according to the manufacturer's recommendations.

(e)Durability - Process and apply according to the manufacturer's recommendations. The

material shall be weather resistant, and following cleaning shall show no discolor ation, cracking, crazing, blistering or dimensional change. The sheeting surface shall be capable of being readily refurbished when cleaned and clear over-coated according to the manufacturer's recommendations.

(f)Acceptance - Furnish a quality compliance certificate according to 00165.35, certifying that the

nonreflective sheeting furnished meets all the above requirements.

02910.32Retroreflective Removable Legend :

(a)General - The letters and numerals for all removable legend shall conform to the design of the

FHWA Standard Rounded Capital Letter Alphabets . The letters and numerals for removable 02910.33 1146 legend for all freeway and expressway signs shall conform to the design of Series "E" modified from the FHWA Standard Rounded Capital Letter Alphabets .

Provide mounting holes within the frames to permit the use of the mounting hardware specified in the Specifications. Provide a sufficient number of mounting holes to ensure a firm at tachment of the frames to the sign and meet the requirements of 00940.45(b). This requires a minimum of four mounting holes at each joint in the border.

(b)Retroreflective Sheeting Legend - Removable legend shall be fabricated with sheeting

conforming to 02910.20 that is permanently adhered to a flat aluminum frame.

Letters, numerals, symbols and borders shall be a minimum of 0.032 inch thick aluminum conforming to ASTM B209, alloy 3003-H14. Degrease and etch the aluminum, or treat with a light, tight amorphous chromate type coating.

Apply the reflective sheeting to the prepared aluminum according to the sheeting manufacturer's recommendations.

The finished letters, numerals, symbols and borders shall be clean- cut and sharp, and shall have a nearly plane surface.

(c)Acceptance - Acceptance of retroreflective removable legend shall be a mill test certificate

from the aluminum manufacturer attesting to the correct alloy, temper, and material thickness of the metal supplied. The Engineer may reject damaged or non-specification materials regardless of the test certif ication furnished.

02910.33Permanent Legends:

(a)General - Permanent legends consist of white retroreflective screened, red retroreflective

screened, black screened or cut -out white retroreflective sheeting. The letters and numerals of all permanent legends shall conform to the design of the FHWA Standard Rounded Capital Letter Alphabets .

(b)Retroreflective White Screened Legend - The transparent paste materials used for the

reverse screening of retroreflective white legends and for the screening of retroreflective red legends shall conform to the recommendations of the manufacturer of the reflective sheeting.

(c)Retroreflective Cut -out Legend - The Material used for retroreflective cut -out legend shall

conform to the requirements of 02910.20.

(d)Nonreflective Black Screened Legend - Furnish Material for nonreflective black screened

legends that is compatible with the sign sheeting, as recommended by the sign sheeting manufacturer .

(e)Nonreflective Black Cut -out Le gend - The Material used for nonreflective cut -out legend

shall conform to 02910.21.

02910.40Hardware - The bolts, nuts, and washers used to fabricate and erect signs shall be

aluminum alloy, stainless steel, or hot -dip galvanized steel. Aluminum for bolts and nuts shall conform to ASTM B211, alloys 2024-T4 or 6061-T6 as the Contractor elects. Aluminum washers shall conform to ASTM B209, alloy Alclad 2024-T4. Stainless steel for bolts, nuts, and washers shall be Type 304 or Type 316. Galvanized steel bolts, nuts, and washers shall be medium carbon steel. Galvanize steel hardware according to AASHTO M 232 ( ASTM A153). Use nylon washers supplied by the sheeting manufacturer as shown or directed. 02910.75 1147 All mounting hardware shall be of the design and type shown, or if not shown shall be of such sizes and kinds as approved by the Engineer.

Blind rivets shall be 1/8 inch diameter, 1/4 inch head diameter, domed head, aluminum alloy conforming to ASTM B316. Aluminum alloys 5052 and 5056 are acceptable alloys. Blind rivets used to attach sign panels to closure strips or wind beams shall be anodized the same color as the sign background.

02910.50Digitally Printed Signs, Temporary - Temporary traffic control signs may use digitally

printed signs from an integrated engineered match component system on the QPL and applied to furnished substrate according to 00222.10(b).

02910.60Electronically Cuttable Films for Use on Retroreflective Sheeting :

(a)General - Electronically cuttable films shall consist of durable, transparent, colored films

coated with a transparent pressure sensitive adhesive protected by a removable liner. The films shall be designed to be cut on knife-over -roll (sprocket fed or friction fed) and flat bed electronic cutting machines. The films shall be available in standard traffic colors, be dimensionally stable, and be designed to opt imally cut, weed, lift and transfer. Use electronically cuttable films from the QPL.

(b)Acceptance - If requested, furnish with each lot or shipment a quality compliance certificate

according to 00165.35, certifying that the Material supplied is an acc eptable product on the QPL.

02910.75Manufacturer Warranty - Furnish a manufacturer warranty that unconditionally warrants

to the Agency the retroreflective sheeting products, sheeting with applied electronic cuttable film products , and installation under this Section against failure, according to this Subsection and

00170.85(c)(1). Use Agency -supplied warranty forms, available from the Engineer

"Unconditionally warrant" means that the warranty covers all failures, regardless of the source or cause of the failure, including, without limitation, whether the source or cause is or may be related to workmanship, inspection, or choice of materials.

The Agency inspection of any portion of the Work during the Contract and during the product installation, the Agency acceptance of the Work , corrections under the warranty, or expiration of the warranty shall not relieve the obligations under this warranty .

(a)Warranty Period:

For retroreflective ASTM Type III and Type IV sheeting used for permanent signs, the warranty period shall be for 10 years.

For retroreflective ASTM Type IX and Type XI sheeting used for permanent signs, the warranty period shall be for 12 years.

For retroreflective sheeting used for temporary signs, the warranty period shall be for 3 years .

(b)Failure - For purposes of the w arranty, failure is defined as the deterioration of retroreflective

sheeting , or sh eeting with applied electronic cuttable film due to conditions inherent to the sheeting (including inks, overlay film, and electronic cuttable film) to the extent that:

The sign shows discoloration, cracking, delamination, loss of adhesion, or The coeffic ient of retroreflection, as measured after signs are cleaned according to the manufacturer's recommendations, is less than the following: 02910.75 1148 • 80 percent of minimum coefficient of retroreflection for designated sheeting or cuttable film according to ASTM D4956 for the first 7 years of the warranty period. • 70 percent of minimum coefficient of retroreflection for designated sheeting or cuttable film according to ASTM D4956 for the remaining 3 years of the warranty period for Type III and Type IV sheeting and remai ning 5 years of the w arranty period for Type IX and Type XI sheeting.

(c)Remedy - Upon notification by the Engineer of a failure, provide the following remedy at no

additional cost to the Agency:

Repair or replace the sheeting, or sheeting with applied electronic cuttable film, within 6 months of the written notification according to the following: • During the first 7 years, restore the sign panel to a condition that meets the Specifications . • For the remaining 3 years (5 years for ASTM Type IX and Type X I sheeting) , furnish replacement sheeting required to restore the sign panel to a condition that meets the Specifications . Use Materials and procedures meeting the Specifications. Coordinate timing of repair Work with the Engineer.

(d)Agency's Right to Make Repairs - If, in the opinion of the Engineer, a failure causes or may

cause a hazard, the failure may be temporarily corrected by Agency or other forces at no additional cost to the Agency. Replace temporary repairs with permane nt repairs at no additional cost to the Agency and according to the Specifications and within the time specified in 02910.75(c).

Source: Oregon Standard Specifications for Construction, 2024 Edition. Pages 1210–1214 of 1,268.

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02831 Pedestrian Fence

02926 Highway Illumination Materials