SECTION 930 — POST MOUNTED SIGNS, TYPE A

930.1 DESCRIPTION — This work is furnishing and installation of fabricated aluminum signs of the type indicated on steel S or W Beam Posts and Breakaway System.


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

(a) Extruded Aluminum Channel Signs, Posts, and Miscellaneous Material.

• Extruded Aluminum Channel Signs — Section 1103.02
• Steel S or W Beam Posts and Breakaway System — Section 1103.07
• Aluminum Bolts, Nuts, Lock-nuts, Lock-washers, Post Clips, Auxiliary Supports for Exit Panels, 1/8-inch Rivets; Aluminum or Nylon Washers — Section 1103 .1 l(c)

(b) Flat Sheet Aluminum Signs with Stiffeners, Posts, and Miscellaneous Material.

• Flat Sheet Aluminum Signs with Stiffeners — Section 1103.03
• Steel S 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

(c) Foundations.

• Class A Cement Concrete — Section 704
• Reinforcement Bars — Section 709.1


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

(a) General. Erect posts plumb using a method that does not twist, bend, or otherwise deform the posts. Before erection, correct twisted, bent, or deformed posts. Erect signs by a method that does not twist, bend, or otherwise deform the signs. Level and correctly align, 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.

(b) Location. The indicated location of sign installations is approximate with the
exact location established at the site. The longitudinal and lateral location will be
marked either by stakes, by paint marks with an identifying symbol, or as otherwise directed.
On tangents, locate and erect the posts to allow signs to face toward the roadway at an angle of 85 degrees from the pavement edge, except face large guide signs with Class II reflective sheeting backgrounds away from the 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 point is equal to 50 times the letter height of the smallest legend, but not less than 300 feet. Example: 50 x 12-inch letter equals a 600 foot sight line.

(c) Removal of Existing Signs. Do not remove existing signs or sign installations, except when indicated or directed. When directed, relocate or store the existing sign and hardware. As directed, either remove the existing sign and support and install it at a new location or remove and store the existing sign and support for Department pickup.

(d) Cleaning and Grubbing. When directed, and as specified in Section 201.3, remove material, brush, trees, or branches which obstruct the clear view of signs being placed.

(e) Restoration of Site. Satisfactorily restore the site to its original condition, as directed, including the disposal of excess or unsuitable materials.

(f) Motorist Service Signs. Provide (except business logo signs) and install symbols, legends and borders, as indicated.

(g) Posts and Foundations. Prior to having posts fabricated, submit a sketch for acceptance for each plan location, showing the 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;
• distance to footing top, measured from reference line elevation at pavement edge to footing top;
• footing base type design and reinforcing steel; and
• bracket identification number and quantity required.

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 1 foot of foundations.
For parts or members, on which galvanizing has been damaged in transition or erection, replace with acceptable new material having properly galvanized surfaces. Minor damages to galvanized surfaces may be repaired as specified in Section 910.3(r).

(h) Erection. For extruded aluminum channels, install lock-nuts on post clips with a torque wrench. Apply 225 inch-pounds of torque to each aluminum locknut with the threads dry, clean, and unlubricated.
For flat sheet aluminum, attach the sign to posts with either twist-in toggle and buckle straps or stainless steel post-clips. Apply 225 inch-pounds of torque to each stainless steel lock-nut with the threads dry, clean, and unlubricated.
Thoroughly clean signs after erection, removing any accumulation of oil, grease, dirt, or foreign material.
When exit panels cannot be supported by two sign posts, brace the panel with one or more auxiliary supports.


930.4 MEASUREMENT AND PAYMENT —

(a) Post Mounted Signs, Type A. Square Foot of sign
Includes removal of existing signs and erection of posts, but not furnishing and galvanizing posts.

(b) Steel S or W Beam Posts. Pound

(c) Breakaway System. Each
Includes all breakaway hardware for a single post and all necessary machining.

Most Current Supplement

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