930POST MOUNTED SIGNS, TYPE A

930.1DESCRIPTION —This work is furnishing, and installation of fabricated aluminum signs of the type

indicated on steelS or W beam posts and breakaway system.

930.2MATERIAL—As shown on the Standard Drawings and as follows:

• Extruded Aluminum Channel Signs. Section 1103.02

• SteelS or W Beam Posts and Breakaway System. Section 1103.07

• Galvanized Steel Hex Head Bolts, Nuts, Lock-Washers; Aluminum Post-Clips, Auxiliary Supports for Exit Panels, 1/8-inch Rivets. Section 1103.11

• Flat Sheet Aluminum Signs with Stiffeners. Section 1103.03

• SteelS or W Beam Posts and Breakaway System. Section 1103.07

• 1/8-inch and 3/16 -inch Aluminum Rivets; Stainless Steel Bolts, Nuts, Washers, Post -Clips; Twist-In Toggle and Buckle Straps; Butting Plates; Auxiliary Supports for Exit Panels . Section 1103.11

• Class A Cement Concrete. Section 704

• Reinforcement Bars. Section 709.1

930.3CONSTRUCTION—As shown on the Standard Drawings and as follows:

Before erection, correct twisted, bent, or deformed posts. Erect signs by a method that does not twist, bend, or otherwise deform the signs. Level, correctly align, and then center signs on the posts and properly fasten. Exercise extreme care when using hoisting cables on the sign to avoid damage to the reflective sheeting. Repair or replace damaged posts and signs. Fasten the signs to the posts with the necessary hardware as detailed in TC 8700 Standard Series.

at the site. Mark longitudinal and lateral location by stakes or paint marks with an identifying symbol. On tangent sections of roadway, locate and erect posts to allow signs to face away from roadway at an angle of 93 degrees from the pavement edge. On curves, locate and erect the posts perpendicular to the sight line, where the sight line is an imaginary line connecting the center of the near traffic lane. The length in feet from the sign to the center of the near traffic lane is equal to 40 times the letter height of the smallest legend in inches, but not less than 300 feet. For example: 50-inch x 12-inch letter equals a 600-foot sight line.

or sign installations that are permanently removed become the property of the Contractor unless indicated otherwise. Remove foundations to a minimum 12 inches below final grade.

trees, or branches, which obstruct the clear view of signs being placed.

unsuitable materials.

signs, as indicated.

following:

• location of sign by plan station;

• lateral offset from pavement edge to sign edge;

• sign size (width and height);

• exit panel sign size (width and height);

• number of post supports and sections;

• post heights, measured from bottom of post base plate to post top;

• measured distance from reference line elevation at pavement edge to foundation top;

• steel finned pipe foundation design; or

• footing base type design and reinforcing steel; and

• bracket identification number and quantity.

Replace galvanized parts or members damaged in transition or erection with new material having properly galvanized surfaces. Repair damage to galvanized surfaces that does not exceed 2% per linear foot of the total surface area according to ASTM A780 and as specified in Section 910.3(r).

2.a Cast -in-Place Foundations. Excavate for the foundation, then position the posts and connections with the post flange faces aligned in the same plane. Place concrete against undisturbed earth, as specified in the applicable parts of Section 1001.3. Form the top 12 inches of foundatio ns.

2.b Steel Finned -Pipe Foundations. Install foundation and provide installation report prepared by Technical Assistant, according to the drawing and manufacturer’s recommendations.

• Technical Assistant. Provide a certified designer/installer to be present at the project site to assist the Contractor and Representative if unusual problems or special circumstances arise. Furnish evidence of the designer/installer’s certification from the steel finned-pipe foundation supplier to the Representative before the start of work.

225 inch-pounds of torque to each galvanized nut with the threads dry, clean, and unlubricated. Attach the sign to posts with twist -in toggle and buckle straps or stainless steel post -clips for flat sheet aluminum. Apply 225 inch -pounds of torque to each stainless steel nut with the threads dry, clean, and unlubricated. Clean signs after erection, removing any accumulation of oil, grease, dirt, or foreign material. Brace the panel with one or more auxiliary supports if exit panels cannot be supported by two signposts.

930.4MEASUREMENT AND PAYMENT—

The unit price includes removal of existing signs, one breakaway system per post and erection of posts, but not furnishing and galvanizing posts.

The price includes all breakaway hardware for a single post and all necessary machining.