630Traffic Signs and Delineators

630.01 Description . This work consists of furnishing and installing delineators, traffic

signs, sign supports, framing, and panels in reasonably close conformity with the requirements shown on the plans an d set out in these specifications. The work and materials shall conform to the requirements of the MUTCD, current on the date of receipt of bids, except as modified by these specifications or as shown on the plans. The Bidder or the Bidder’s proposed supplier may be required to show satisfactory evidence of successful experience in fabrication of reflectorized multi-panel highway signs prior to award of the contract. Bidders may al so be required to show evidence of successful experience or capability in erection of reflectorized multi-panel highway signs. 630.01.1--Contractor Designed Supports. When specified as Contractor Designed Metal Overhead Sign Supports, the Contractor will be responsible for the design of the metal overhead sign support(s) and overhead sign support(s) on bridges. The design shall meet the latest requirements of the AASHTO Standa rd Specifications for St ructural Supports for Highway Signs, Luminaries and Traffic Signals. The Contractor shall submit to the Director of Structures, State Bridge Engineer, a design using steel. The design shall be a rectangu lar box truss connected at both the top and bottom to the vertical support posts. With the exception of cantilever mounts, overhead support structures shall have two vertical sup port posts at each end of the truss. Design drawings, calculations and other necessary suppo rting data shall be submitted as soon as possible after the Pre-Construction Conference. The controlling sign configuration and total area of design sign shall be labeled on the design drawings. The design shall be prepared by a Professional Engineer registered in the State of Mississippi proficient in the design of overhead sign structures. The Contractor shall provide a detailed cross s ection at the location of each new sign truss. At the locations where the truss will span exis ting roadways, the Contractor shall obtain a surveyed cross section extend ing beyond the limits of the truss. The cross section will show the horizontal dimensions and elevations of ditches, edge of travel lanes, shoulder lines, pavement crown lines, barriers and retaining walls, etc. The truss and signs shall be located on the cross section and shall include both vertical and horizontal dimensions to the finished roadway surface. The overhead sign truss details provided in the plans or documents will not be acceptable as the Cont ractor’s detailed cross section. The cross section information shall be of sufficient accuracy to verify the sign truss dimensions required for each specific location. This information shall be submitted for review with the sign truss shop drawings and calculations. The Contractor is responsible for designing and constructing modifications to barriers and retaining walls as necessary to carry sign tru ss loads for sign truss assemblies attached to such structures. Barrier faces must smoothly transition back to the existing barrier section as specified in the plans. All designs and proposed modifications must be stamped by the Contractor’s engineer and submitted to the Engineer for review. Bridge information plans are provided to assist the Contractor’s Engineer in designing attachments to bridges. All bridge attachments must be submitted to the Director of Structures, State Bridge Engineer through the Project Engineer for review. Use of chemical adhesive anchors is prohibited. Mechanical anchors are permissible as approved by the Director of Structures, State Bridge Engineer . Mounting holes for sign assemblies attached to prestressed concrete girders shall be placed at locations where the prestressing strands are not damaged by drilling. Mounting sign assemblies to steel girders by welding is prohibited. A limited number of mounting holes may be drilled only in the steel girder webs at locations that do not interfere with existing members such as bolts, stiffeners, and splice plates. Attachments that cause concentrat ed loads on girder webs will be spread out along the web both vertically and horizontally by use of steel plates so as to not cause distortion in the web. Drilling in steel girder bottom flanges is prohibited. The design wind speed shall be as shown in the design specifications with a minimum of 90 mph. In addition to the loads required in the design specifications, overhead sign supports shall be designed to support a uniform load of 40 pounds per linear foot applied vertically to the truss to which the signs are attached, extending along the truss across the roadway below from points four feet outside each outer edge of exterior travel lane, unless otherwise specified. Appropriate damping or energy absorbing devices shall be installed in the event that an overhead structure is erected without installation of the permanent sign panels or if the area of permanent sign panels installed is not sufficient to prevent detrimental wind-induced vibration. The larger of the following sign configurations shall be used in the design of overhead sign support structures:

630.02 Materials . Materials for signs and delineators shall meet the requirements of

Section 721. Although certain particular brands, makes of materials, devices, processes, and/or equipment are named herein for the purpose of establishing minimum acceptable standards, it is neither implied nor intended that those named are to be considered to the exclusion of comparable brands, materials, de vices, processes, or equipment. All warranties, guaranties, and instruction sheets normally furnished by the manufacturer for materials and supplies used in the work shall be delivered to the Engineer prior to final acceptance of the project. Material for Contractor designed metal overhead sign supports shall meet the following: Reinforcing Steel. Reinforcing steel used in reinforced concrete footings shall be in accordance with Subsection 602 and meet the requirements of ASTM A 615, Grade 60. Anchor Bolts. Material for anchor bolts shall meet the requirements of ASTM A 36. Anchor bolts shall be hot-dipped galvanized in accordance with ASTM A 153, Class C. Threads and nuts for anchor bolts shall be lubr icated with a visible dye so that a visual check can be made for proper lubrication prior to installation. Structural Steel. Material for posts, chords and bracing members shall meet the requirements of ASTM A 501 or ASTM A 53, Grade B. Material for structural shapes, plates, posts and chord caps shall meet the requ irements of ASTM A 36. Material for round tapered monotube shall meet the requirements of ASTM A 595, Grade A.

630.02.1 Fabrication of Signs and Sign Panels . Signs shall be fabr icated in a properly

equipped shop owned and operated by the Contractor or approved Subcontractor or supplier.

630.02.2 Fabrication of Aluminum Extrusions and Sheets . The fabrication of

aluminum extrusions and sheets shall generally conform to or be equivalent to the fabrication methods and practices recommended in the handbook of the major producers of aluminum materials and the following specific requirements:

630.02.3 Preparation of Aluminum for the Application of Reflective Sheeting .

Extruded aluminum and flat sheet aluminum sign panels to which reflective sheeting is to be applied shall be prepared as follows: Preliminary Cleaning. The panel shall be co mpletely submerged in a six percent (6%) solution of an inhibited alkaline cleaner at 160°F to 180°F for three minutes, followed by a thorough rinse with clean, running cold water. A grease solvent such as mineral spirits or naptha, conforming to ASTM D 235, or trichloroethylene, conforming to ASTM D 4080, may be used. Surface Preparation. For flat sheet aluminum, preliminary cl eaning shall be followed by a surface treatment with a six to eight percent (6 % to 8%) solution of phosphoric acid applied to the surface by immersion or brushing. Th e solution shall be allowed to remain on the surface for five minutes and then thoroughly rinsed with running cold water followed by hot water tank rinse. Drying. The panels shall be dried by the use of forced warm air. Handling. Metal shall not be handled except by device or clean canvas gloves between all cleaning and etching operations and the appli cation of reflective sheeting. There shall be no opportunity for metal to come in contact with grease, oils, or other contaminants prior to painting.

630.02.4 Preparation of Aluminum for Painting . Aluminum that is to be painted shall

be cleaned and prepared by a process conforming to ASTM D 1730, Type B Chemical Treatment. Metal shall not be handled except by device or clean canvas gloves between all cleaning and etching operations and the application of paint. There shall be no opportunity for metal to come in contact with greases, oils, or other contaminants prior to painting.

630.02.5 U-Section Posts . Ground mounted U-section posts shown in the plans or

referenced in the contract documents may be steel U-section posts or Tubular Type posts meeting the requirements of Subsection 721.02.2. Regardless of whether U-section posts or Tubular Type posts are used, measuremen t and payment will be under pay item 630-C, Steel U-Section Posts.

630.02.6 Blank.

630.02.7 Reflective Sheeting . Reflective sheeting shall be applied to properly treated

base panels with mechanical equipment in a manner specified for by the sheeting manufacturer. Type II adhesive coated sheeting shall be pre-perforated. Sign faces comprising two or more pieces of pa nels of reflective sheeting shall be carefully matched for color at the time of sign fabrication to provide uniform appearance and brilliance during both day and night. Alternate, successive widt h sections of either sheeting or panels must be reversed and consecutive to ensure that corresponding edges of reflective sheeting lie adjacent on finished sign. Non-conformance may result in non-uniform shading and an undesirable contrast between ad jacent width of applied sheeting, which will not be acceptable. At splices, Type I adhesive coated sheeting shall be over-lapped at least 3/16 inch. Type II adhesive coated sheeting may be spliced with an overlap of at least 3/16 inch or butted with a gap not to exceed 1/32 inch. Only butt splices will be permitted with transparent screen processing. Sheeting applied to extruded sections shall extend over top edges and down side legs a minimum of 1/16 inch. Reflective sheeting splices and sign edges shall be sealed with materials supplied and in the manner specified by the sheeting manufacture.

630.02.8 Removable Copy . Route markers used on structural panels with removable

copy shall be made up as standard route mark ers on flat sheet metal as specified and shall be riveted to the structural panel. These rout e markers will not be paid for as separate signs but shall be considered as part of the major sign to which they are affixed.

630.02.9 Silk Screening . Where specified on the plans, sign letters, numerals, symbols,

and border shall be applied to the sign panel by direct or reverse silk screen method. The letters shall be in accordance with the plans and series letters as set out by "Standard Alphabets for Highway Signs" which can be obtained from FHWA. Unless otherwise specified, all silk screen legend shall be on silver-white or yellow reflective sheeting background. Screening shall be accomplished in the manner specified by the sheeting manufacturer. Processing may be accomplished either before or after application of the sheeting to the flat, smooth base panels.

630.02.10 Packing, Storing and Shipping Signs . Signs shall be slip sheeted and packed

in such a manner as to ensure their arrival at their destination in undamaged condition. Signs shall be stored on edge in a cool, dry place, and shall not be allowed to become wet during shipment or storage.

630.02.11 Shop Drawings . The Contractor shall submit fo r the approval of the Engineer

scale drawings of all sign faces, showing arrangements and spacing of all letters, numerals, symbols, and border. For each type of sign support to be used with each different type of sign panel, the Contractor shall submit detailed drawings of the proposed method of attaching the sign to the supports on all signs not detailed on the plans.

630.02.12 Welding . Any welding shall conform to the requirements of Subsection

630.03.8 Welding for Contractor designed metal overhead sign supports shall conform to

the latest edition of AWS D1.1 for structural steel.

630.03 Construction Requirements .

630.03.1 Construction Stakes . Unless the contract requires construction staking by the

Contractor, the Engineer will furnish and set construction stakes for signs and will furnish the Contractor with all required information relating to lines and grades. The Contractor shall check all leading dime nsions and clearances measured from such stakes and thereafter will be responsible for orie ntation, elevation, offset, and level of all signs so erected.

630.03.2 Sign Positioning . The glossy surface on sign faces may produce specular

reflection. Signs shall be positioned to e liminate or minimize specular reflection.

630.03.2 1--Overhead Signs . Unless otherwise directed by the Engineer, signs shall be

erected at right angles to the road and so that the sign face is tilted back or is vertical as determined by the approach grade of the roadway or as shown on the plans.

630.03.2 2--Ground-Mounted Signs . Signs shall be erected so that the sign face is truly

vertical and at 93 degrees away from the cente r of the lane that the sign serves and the direction of travel unless otherwise directed by the Engineer. Where lanes divide and on curves, sign faces shall be oriented so as to be most effective both day and night and to avoid the possibility of specular reflection. 630.03.2.3--Vertical and Horizontal Clearances . All signs shall be installed so as to meet the vertical and horizo ntal clearances shown on the plans or if not shown the minimum clearance given in the MUTCD shall apply.

630.03.3 Excavation . The Contractor shall perform the excavation required for sign

installation to neat lines by suitable means.

630.03.4 Posts . All posts shall be set at the requir ed line and grade. Unless otherwise

shown on the plans, all posts except delineato r posts shall be set in Class "B" concrete. Any required reinforcing steel will be shown on plans. Exposed concrete shall be finished with a steel float to the slope shown on the plans. Footings for overhead sign sup ports shall be Class "B" concrete and shall be in accordance with the required dimensions, alignment, grad es, reinforcement, and method of placement shown on the plans. Treated timber posts shall be set in holes of the specified depth and of sufficient diameter to allow proper tamping and compaction or back fill. The backfill shall be made with the most suitable earth available and shall be tamped until the post is firm and rigid in a vertical position. Pipes used for posts shall be capped by suitable means to exclude moisture.

630.03.5 Framing . Framing for ground-mounted signs shall be as shown on the plans.

Holes may be field punched as permitted by the Engineer. All steel used for framing shall be galvanized.

630.03.6 Erection of Signs . Signs shall be erected in a neat and workmanlike manner.

After installation is complete, signs will be insp ected at night by the Engineer. If specular reflection is apparent on a sign, its positioning shall be adjusted by the Contractor to eliminate this condition.

630.03.7 Erection of Delineators . The location of each type of delineators shall be as

shown on the plans. The post shall be driven and a driving cap used to protect the curb. Posts shall be driven vertically and driving caps used to protect the posts. Delineator shall be attached to the posts as shown on the pl ans by means of a huck or cherry tool and aluminum fastener.

630.03.8 Overhead Sign Supports .

630.03.8 1--Fabrication . Metal overhead sign support struct ures shall be steel. They shall

be fabricated as shown on the plans in a pr operly equipped plant. All welds shall be performed in the shop by certified welders. Welding for steel structures shall conform to the requirements of Subsections 810.03.5 and 810.03.6. Unless a particular edition of the AASHTO sp ecifications is indicated on the plans, the edition current at the time of receipt of bids shall be applicable. Each Contractor-designed metal overhead sign support structure shall be match-marked and assembled in the shop for inspection prior to shipment.

630.03.8 2--Shop Drawings . Shop drawings of the structures shall be submitted for

review in accordance with Subsection 810.02.2. They shall show the required vertical camber for the horizontal support and method of fabricating, including welding procedure. Shop drawings and design calculations for Contractor designed metal overhead sign supports shall be submitted to the Bridge Engineer in triplicate for review prior to fabrication. Shop drawings shall show all members, connections (welds), footings and details necessary for a complete structure. The required truss camber and method of fabricating shall also be shown.

630.03.8 3--Inspection and Testing . Unless waived in writing by the Engineer, inspection

of the fabrication will be required. Each structure shall be match marked and assembled in the shop prior to inspection. Steel structures to be galvanized shall be match marked and assembled for inspection prior to galvanizing. Additional inspections for galvanized steel structures may be required before and/or after galvanizing. The Engineer shall be notified at least 24 hours prior to the time that an inspection is sche duled. The structures shall be checked for alignment, sound welds, and general workmanship. Four copies of a certification by the galvanizer that galvanizing meets the appropriate specification shall be furnished to the State Materials Engineer. Mill test reports on material in primary members shall be submitted in accordance with Subsection 810.03.25. Shop inspection is required for Contractor designed metal overhead sign supports to ensure that fabrication and welding comply with the contract requirements. A commercial testing laboratory retained by the Department will perform the inspection but such inspection does not relieve the fabricator of any responsibility regarding compliance with the contract requirements. A pre-fabricatio n conference shall be required unless waived by the Bridge Engineer. No fabrication of any structure shall begin until approved drawings and welding procedures have been distributed, the pre-fabrication conference held, and authorization for the work to begin given by the Bridge Engineer.

630.03.9 Removal of In-Place Signs, Markers and Posts . The Contractor shall salvage

existing signs, markers, and posts and stockpile them at the locations shown on the plans. Signs and markers shall be removed from posts and stacked on edge with paper separators between units. Posts shall be pulled without being bent and stockpiled off the ground. Care shall be taken with all handling, hauling, and storing to avoid damage. This work shall be incidental to items of the contract, and separate payment will not be allowed.

630.03.10 Bolt Connections for Contractor Designed Metal Overhead Sign Supports .

High-strength bolts shall meet the requirements of ASTM A 325, Type I and shall be no larger than one inch (1”) in diameter; bolts other than high-strength shall meet the requirements of ASTM A 307, Grade A. Nuts for all bolts shall meet the requirements of ASTM A 563. Nuts for high-strength bolts shall be heavy hex, Grade DH. Nuts for all other bolts shall be hex, Grade A. All nuts sh all be lubricated with a visible dye so that a visual check can be made for proper lubrica tion prior to installation. All washers shall meet the requirements of ASTM F 436. All fa steners (bolts, nuts and washers) shall be galvanized in accordance with ASTM A 153, Class C. All connections using high strength bolts require Direct Tension Indicators (DTIs). DTIs shall meet the requirements of ASTM F 959 and shall be mechanically galvanized in accordance with AS TM B 695, Class 50 coating. 630.03.11--Galvanizing for Contractor Designed Metal Overhead Sign Supports . Steel assemblies shall be galvanized after fabrication in accordance with the latest requirements of ASTM A 123. Damage to the galvanized coating shall be repaired subsequent to erection by a method approved by the Bridge Engineer. Holes may be drilled in structural steel members as needed for venting during galvanizing. Such holes shall be in accordance with the following requirements:

630.03.12 Final Cleaning Up . The Contractor shall remove all rejected and unused

materials and debris from the right-of-way. Shoulders and slopes shall be restored to their original condition. Excess excavation shall be disposed of off the right-of-way at the Contractor's expense unless otherwise directed by the Engineer. Before final inspection, the Contractor shall perform such touching up of paint finishes, cleaning of exposed sign and support surfaces, and other cleaning up as ma y be necessary to ensure the effectiveness and neat appearan ce of the work.

630.04 Method of Measurement . Standard sheet aluminum signs will be measured by

the square foot of sign face for each specified thickness. Extruded aluminum signs, including removable copy, will be measured by the square foot of sign face. Built-up steel panel signs, including removable copy, will be measured by the square foot of sign face. Structural steel used in building up the sign pa nel system will not be measured for separate payment. In determining the area of sign faces, no de duction will be made for corner radii or mounting holes. The area of octagonal signs, U.S. shields, and Interstate shields will be computed as the area of the circumscribing squa re or rectangle. The area of the triangular signs will be computed as the area of the triangle. Steel U-section posts, square tube posts, and square tube post inner sleeve will be measured by the linear foot of each specified size. Timber posts will be measured by the unit. Structural steel beams for vertical sign supports will be measured by the linear foot of each specified size. Structural steel angles and bars, or channels, used for lateral bracing of vertical sign supports, will be measured by the pound. Steel pipe posts will be measured by the linear foot of each specified size. Concrete for overhead sign support foundations will not be measured for separate payment. Such costs shall be included in the cost of the overhead sign assembly. Concrete for roadside signs will be measured in cubic yards in accordance with Section 601. In computing the volume, the neat dimensions shown on the plans will be used except for variations as may be ordered by the Engineer. Reinforcement, when called for on the plans, will be measured in pounds in accordance with Section 602. Excavation will not be measured for separate payment and the cost thereof shall be considered incidental to and included in the unit prices for footings, posts, etc. Paint and painting will not be measured for separate payment and the cost thereof shall be included in unit prices for items painted. Metal overhead sign support assemblies will be measured by the unit. Delineators and object markers will be measured by the unit, including post, fastener, and single or multiple units as specified.

630.05 Basis of Payment . Signing items, measured as pres cribed above, will be paid for

at the respective contract unit or lump sum price, which price shall be full compensation for completing the work. Payment will be made under: 630-A: Standard Roadside Signs, Description - per square foot 630-B: Interstate Directional Sign s, Description - per square foot 630-C: * Posts, Weight - per linear foot 630-C1: Square Post Inner Sleeve - per linear foot 630-D: Structural Steel Beams, Description - per linear foot 630-E: Structural Steel Angles and Bars, Description - per pound 630-F: Delineators, Mounting, Description - per each 630-G: Type ____ Object Markers, Description, Mounting, Color - per each 630-H: Treated Timber Posts, Size and Length - per each 630-I: Metal Overhead Sign Supports, Assembly No. ___, ** - lump sum 630-J: Overhead Sign Supported on Bridge, Assembly No. ___, ** - lump sum 630-K: Welded & Seamless Steel Pipe Posts, Size - per linear foot * Specify Steel U-Section or Square Tube ** Indicate when the sign is “Contractor Designed" SECTION 631 – TRAFFIC SIGNAL SYSTEMS - GENERAL

631.01 Description. This section together with the pay item sections covering individual

components and the plans are intended to describe and include materials and work necessary for completion of traffic signal installations and modifications. All work, materials, or methods which ma y be necessary for completion of the traffic signal system which are not specifically mentioned in thes e specifications or on the plans shall be furnished as incidental to the pay items of the contract and the cost included in the respective contract prices bid.

631.01.1 Scope of Work . Work shall consist of furnishing and installing, modifying, or

removing all components, equipment, and incidentals necessary for a fully functioning, tested and approved traffic control signal system, including communications connections as applicable in the plans. Where there is an existing system involved, th e Contractor shall reuse, take ownership, immediately remove, or stockpile materials from the project site, as indicated in the plans or contract documents. Stockpiled materials shall be safely stored at a specified location. Stockpile locations shall be determined and approved by the Engineer. Any existing materials or items not addressed for payment under pay items for Removal of Obstructions or Removal of Existing Traffic Signal Equipment shall be considered incidental and their reuse or removal cost included in other respective contract prices bid. All installations shall be carried out in strict conformity with all requirements stated or implied on the plans and in the specifications. Upon completion the signal installation shall present a neat and finished appearance. A ll work and materials shall be subject to inspection at all times. The locations shown on plans, unless otherwise noted, are approximated and based on the best available information at the time of design. Slight alterations or relocation of items may be required based on site conditions or as directed by the Engineer.

631.02 Materials.