604 657.7 -PAY ITEMS : ITEM DESCRIPTION UNIT 657006 -001 S4X7.7 Steel Beam Support Linear Foot 657006 -005 W6X12 Steel Beam Support Linear Foot 657006 -010 W8X18 Steel Beam Support Linear Foot 657006 -015 W10X22 Steel Beam Support Linear Foot 657008 -* 2.00 LB Channel Post Linear Foot 657010 -* 3.00 LB Channel Post Linear Foot 657012 -* 4.00 LB Back to Back Channel Post Linear Foot 657014 -* 6.00 LB Back to Back Channel Post Linear Foot 657016 -* Class B Concrete Footing, Plain, Roadside Cubic Yard 657017 -* Class B Concrete Footing, Reinforced, Roadside Cubic Yard 657018 -* Support or Bracket Removal Each 657019 -* Pipe Post Each 657035 -* Square Tube Support, 2.00X14GA Linear Foot 657040 -* Omni -Directional Breakaway Device Each 657041 -* Back to Back U -Channel Breakaway Device Each 657042 -* Surface Mount Breakaway Device Each 657050 -* Bridge or Retaining Wall Bracket, Type Each 657060 -* Barrier Wall Bracket, Type Each
* Sequence Number
605 SECTION 658 OVERHEAD SIGN STRUCTURES
658.1 -DESCRIPTION : This item shall consist of the fabrication and erection of overhead frame, cantilever, butterfly, and span structure sign supports and fastening accessories in accordance with the requirements of the Pl ans and of these Specifications. All details not specified or not shown on the Plans shall conform to the details and requirements set forth in the following Specifications and publications:
Details Book Vol. II, Signing, Signals, Lighting, Markings, and ITS, latest issue, including revisions (further referenced to herein as the Standard Details). ii. The Manual on Uniform Traffic Control Devices for Streets and Highways, latest issue , as printed by the Federal Highway Administration, U.S. Department of Transportation (Referred to as the MUTCD). iii. Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals, 6th Edition, including revisions, American Association of State Highway and Transportation Officials.
All material, fabrication, and installation requirements for overhead frame structures shall be included in the project Plans and shop drawings.
658.2 -MATERIALS : Materials furnished shall be of new stock conforming to the requirements of the Specifications, and shall meet the approval of the Engineer.
658.2.1 -Pipe: Non-tapered steel pipe used for arms, chords , support legs, and bracing shown on various Standard Detail sheets shall be seamless or welded pipe conforming to A500 Gr. B or C, API 5L X42 or X52, A53 Grade B, or A252 Grade 3. Non-tapered aluminum pipe used for chords and bracing shown on Standard Detail sheets TE5-1A and TE5 -1B shall conform to ASTM B221, ASTM B429, or ASTM B241, all Alloy 6061, temper T6. Tapered steel pipe used for arms and support legs shown on Standard Detail sheet TE4 -4B shall be manufactured from steel having a min. yield strength of 55,000 PSI after fabrication. Galvanized in accordance with ASTM A123.
658.2.2 -Plate: Flat steel plate used for chord plates, base plates, arm end plates, arm splice plates, and box flange plates shown on various Standard Detail shee ts shall conform to ASTM A572, Grade 42. Galvanized in accordance with ASTM A123. Flat steel plate used for gusset plates, saddle plates, hand hole plates, and stiffener plate shown on various Standard Detail sheets shall conform to ASTM A36. Galvanized in accordance with ASTM A123. Flat aluminum plate used for gusset plates and chord plates shown on Standard Detail sheets TE5 -1A and TE5 -1B shall conform to ASTM B209, Alloy 6061, temper T6.
658.2.3 -Structural Connection Bolt: Carbon steel structura l connection bolts and associated hardware shown on various Standard Detail sheets shall conform to the following