850.02 Signs
C.Sign Locations Place crossbuck signs in accordance with MUTCD for Streets and Highways, or as directed by the Resident Engineer.
849.05 Method of Measuremen T — Vacant
849.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit: RAILROAD -HIGHWAY CROSSBUCK SIGNS Each Include the cost of posts and footings in the contract unit price for Railroad -Highway Crossbuck Signs .
850.01 Description
This work consists of providing and erecting signs, including sheet aluminum and extruded aluminum panel signs with a retroreflective or non -retroreflective sheeting background, and steel or aluminum sign bracket arms, bolts, and fittings.
850.02 Materials
Provide materials in accordance with Section 719, “Signs.” Provide signs with Type III high intensity retroreflective sheeting unless otherwise shown on the Plans. Provide extruded panel signs with Type III high intensity retroreflective sheeting for the background with Type VIII retroreflective sheeting for legends and borders. Provide durable, transparent or opaque, high intensity colored electronic cuttab le film with pressure sensitive adhesive and removable liner for Interstate shields for both extruded aluminum signs and route assembly signs. Obtain the Resident Engineer’s approval of shop drawings before starting the manufacture of special signs. Use h igh intensity sheeting for all regulatory signs. The high intensity sheeting shall meet the requirements of ASTM D4956 for type III or IV sheeting. Use fluorescent yellow sheeting for all warning signs. The fluorescent yellow sheeting shall meet the requir ements of ASTM D4956 for type III or IV sheeting. Use high intensity sheeting for all green and blue signs on conventional highways. The high intensity sheeting shall meet the requirements of ASTM D4956 for type III or IV sheeting. Use type III or IV high intensity background with type VIII legends and borders on all panel signs and overhead signs. The type III or IV background and the type VIII legends and borders shall meet the requirements of ASTM D4956. SIGNS 850.04 Provide materials as shown on the Plans. Submit a Type A certification in accordance with subsection 106.04, “material certification,” to the Resident Engineer
850.03 Equipment — Vacant
850.04 Construction Methods
A.Cleaning Clean sheet aluminum and extruded aluminu m panel signs before applying sheeting adhesive and sheeting in accordance with the manufacturer’s recommendations.
B.Application of Sheeting Pre-perforate Class 2 adhesive coated sheeting. Use mechanical equipment to apply sheeting to treated base panels as follows:
1.Continuous Roll Application Continuously apply the sheeting with Class 1 adhesive coating over the entire surface of the sign. Prevent air pockets or bubbles. Ensure the retroreflective sheeting for extruded panel signs extends ¼ in [6.35 mm] over and adheres to each side of the panel. For sheeting on extruded panels, ensure no more than one splice per panel.
2.Color Match During sign fabrication, match the color of sign faces with at least two pieces or panels of retroreflectiv e sheeting to provide uniform appearance and brilliance, at night and during the day. The Resident Engineer will reject signs with non -uniform shading and contrast between adjacent widths of applied sheeting.
3.Splices At splices, overlap Class 1 adhesiv e coated sheeting at least 3/16 in [4.76 mm]. Butt splice Class 2 adhesive coated sheeting and ensure a gap not exceeding 1/64 in [0.397 mm]. Only use butt splices on screen processed sign faces with transparent colored ink. For sheet metal signs with heights no greater than 24 in [0.61 m], the Department will not allow retroreflective sheeting splices. For sheet metal signs at least 36 in [0.91 m] high, the Department will allow one horizontal or one vertical retroreflective sheeting splice.
C.Finishi ng Signs After applying the retroreflective sheeting background, use the silk screen process to apply messages and borders on sheet metal signs. Use a cutout legend, if required by the Contract. Seal sign face splices and edges with materials supplied and recommended by the sheeting manufacturer. Use stick -on copy for legends, symbols, and borders on extruded panel signs. Ensure finished signs with a smooth and uniform light surface with clear and sharp letters and numbers. Protect sheet signs from moist ure during shipment or storage.
850.06 Signs
D.Sign Locations and Positions Erect signs with sign faces in a vertical position and horizontally angled away from the direction of travel, as shown on the Plans. Prevent specular reflection from erected signs. Adjust si gn positioning to eliminate or minimize specular reflection at no additional cost to the Department. Align the lower edge of extruded panel signs on overhead trusses along the centerline of the lower horizontal chord member. Align the lower edge of extrud ed panel signs a maximum of 5’ below the center of the monotube and at least 17’ -6” above the finished grade. After installation, the Resident Engineer will inspect the signs at night.
850.05 Method of Measuremen T
The Resident Engineer will measure signs by the area of the vertical front face with no deduction for rounded corners.
850.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:
A.SHEET ALUMINUM SIGNS Square Foot [Square Meter]
B.EXTRUDED ALUMINUM PANEL SIGNS Square Foot [Square Meter]
C.MASTARM MOUNTED SIGNS Square Foot [Square Meter]
D.SPECIAL SIGNS Each or Square Foot [Square Meter] GALVANIZED STEEL SIGN POSTS 851.06 SECTION 851 GALVANIZED STEEL SIGN POSTS
851.01 Description
This work consists of providing and constructing galvanized steel sign posts and footings.
851.02 Materials
Provide materials in accordance with Section 721, “Galvanized Steel Sign Posts.”
851.03 Equipment — Vacant
851.04 Construction Methods
If necessary, field cut steel posts and place the cut end in the concrete foundation. Re -galvanize, metalize, or paint steel post parts, if damage reveals ba re metal. Use zinc dust -oxide paint, approved by the Resident Engineer. The Department will not allow the use of welded splices in round pipe or wide flange beam posts.
851.05 Method of Measuremen T — Vacant
851.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:
A.GALVANIZED STEEL WIDE FLANGE BEAM POSTS Linear Foot [Meter]
B.GALVANIZED STEEL PIPE POSTS Linear Foot [Meter]
C.SQUARE TUBE POST Linear Foot [Meter]
D.FLANGE CHANNEL POSTS Linear Foot [Meter] If the Contract requires breakaway sign posts, include the cost of breakaway design elements in the contract unit price for the relevant post pay items. Unless otherwise required by the Contract, the D epartment will pay for sign post footings in accordance with Section 804, “Concrete Footings.”
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 870–872 of 935.