645Highway Signing

645.01 Description This work shall consist of designing, furnishing and installing new

signs, sign supports, delineators, Polyvinylchloride (PVC) Pipe and breakaway devices and removing, relocating and/or modifying existing signs and sign supports, in accordance with these specifications and in reasonably close conformity with the Contract Plans.

645.02 General All equipment shall be new unless otherwise specified. Requests for

substitution of any specified material shall be submitted in writing with all documentation (specifications, mill certifications, etc.) in order to enable the Department to evaluate the proposal. Substitutes for specified material may be accepted, upon approval of the Fabrication Engineer. Substitutes shall give equal or better service than the specified material. Where an existing system is to be modified, the existing material shall be removed, upgraded, or disposed of as directed by the contract documents. 645.021 Materials Materials shall meet the requirements specified in the following Sections of Division 700 - Materials: P o l y v i n y l c h l o r i d e ( P V C ) P i p e 706.08 R e f l e c t i v e S h e e t i n g 719.01 Demountable High Intensity Reflectorized Letters, Numerals, Symbols and Borders 719.02 A l u m i n u m E x t r u s i o n s 719.03 A l u m i n u m S h e e t s 719.04 Plywood 719.05 Demountable Reflectorized Delineators 719.06 A s s e m b l y H a r d w a r e 719.07 Aluminum Supports 720.01 Steel Supports 720.03 6-133 S t e e l H - b e a m P o l e s 720.06 A n c h o r B o l t s 720.07 U - C h a n n e l P o s t s 720.08 Wood Sign Posts 720.12 Paint for the edge and back of plywood and field coat paint for wood sign posts shall be an exterior grade dark green enamel conforming to Federal Specifications TT-P-71b. Materials shall meet the gradation requirements only of the following: Aggregate for Untreated Surface Course and Leveling Course 70 3.10 Underdrain Backfill Material 703.22 645.022 Sign Layout Drawings The Contractor shall submit 3 sets of sign-face, layout- detail, and scale drawings. Fabrication of the signs shall not begin until the Contractor has received approval of these drawings. The drawings shall contain complete detailed information and dimensions. One set of drawings will be returned to the Contractor, who will submit corrected drawings, if required. The drawings shall be detailed using the same units used on the Contract Plans. 645.023 Sign Support Structures The design, materials and fabrication of Sign Support Structures shall meet the requirements of the current edition of AASHTO “LRFD Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals” and interims thereto, as noted below except as otherwise indicated within these specifications or on the Contract Plans. Beam-mounted roadside sign supports and associated signs and hardware shall be designed using the following criteria:  Basic wind speeds based on a 300-year mean recurrence interval  K z as specified in Table C3.8.4-1 (Height and Exposure Factors)  Kd as specified in Table 3.8.5-1 (Directionality Factors)  G as 1.14, minimum (Gust Factor)  Cd as specified in Table 3.8.7-1 (Wind Drag Coefficients) Bridge-mounted, bridge-type, cantilever, and butterfly-type sign supports and associated signs and hardware and all sign support structures supporting variable message signs shall be designed using the following criteria:  Basic wind speeds based on a 1700-year mean recurrence interval  Kz as specified in Table C3.8.4-1 (Height and Exposure Factors)  Kd as specified in Table 3.8.5-1 (Directionality Factors)  G as 1.14, minimum (Gust Factor)  Cd as specified in Table 3.8.7-1 (Wind Drag Coefficients)  Deflection requirements as specified in Section 10.4 Cantilever and butterfly-type sign supports and all structures supporting variable message signs shall be classified as Fatigue Category I. Bridge-type sign supports shall be 6-134 classified as Fatigue Category II. Fatigue Importance Factors shall be as specified in Table 11.6-1 (Fatigue Importance Factors). For bridge-mounted sign supports (including approaches to bridge structures), the mounting height shall be measured as the distance of the mounted sign(s) center of gravity to one of the following: For bridges over bodies of water: above the prevailing water level or, in the case of tidal waters, above mean high tide. For overpass structures: above the lower roadway level. For approach ramps: above the average adjacent ground level, if said ground level is more than 10 feet below the base of the structure. All cantilever and butterfly type sign support structures shall be equipped with an approved damping or energy-absorbing device. For aluminum construction, welding shall conform to the current edition of AWS Structural Welding Code, Aluminum, D1.2 for aluminum construction. After execution of the contract and before any shop work has commenced, the Contractor shall submit for approval the drawings, and design and fatigue computations if prescribed below, for all Sign Support Structures proposed to be furnished and erected under this contract. The drawings shall be of sufficient detail to indicate material and/or dimensional conformance with these specifications and the Contract Plans and, in the case of bridge, cantilever and butterfly type sign supports, shall be sufficiently detailed to show all significant structural details. Approval for deviations from the Contract Plans and/or Specifications shall be requested in writing and shall be approved by the Fabrication Engineer before being incorporated in the manufacturer's drawings. Requests for substitution of all specified material shall be submitted in writing, with full documentation (specifications, mill certification, etc.) enabling the Department to evaluate the proposal. Sign Support Structures and anchor bolts shall meet the requirements specified in Section 720 as well as the current edition of AASHTO “LRFD Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals” and interims thereto. A Certificate of Compliance shall be provided for all applicable materials noted in Section 645.021 – Materials, in accordance with the requirements of the General Statement of Division 700 - Materials.

645.03 Classification of Signs Sign sizes, color and legend designs shall conform to

these specifications, the Contract Plans, and MUTCD requirements. The signs are classified according to the intended use as follows:

645.04 Fabrication of Type I Guide Signs

645.06 Installation of Type I Signs The sign locations shown on the Contract Plans are

approximate; exact locations will be determined in the field by the Resident. Signs stockpiled before erection shall be stored in a vertical position and completely covered to avoid staining, weathering, and dirt accumulation.

645.07 Demounting and Reinstalling Existing Signs and Poles Signs and poles

designated to be demounted and not designated to be reinstalled, except those designated to be demounted by others, shall be delivered to the Resident. Existing sign panels, poles, foundations, and sign hardware, damaged because of the Contractor's operations shall be replaced or repaired by the Contractor to the satisfaction of the Resident. 6-144 New or relocated regulatory, warning, confirmation or route marker assembly signs shall be installed the same working day as the corresponding existing signs are demounted. All new or relocated guide signs shall be installed within two working days of the time the corresponding existing sign is demounted. Before the Contractor demounts any regulatory or warning sign, they shall erect a similar easel mounted sign at a designated location. The Contractor shall maintain this temporary sign in place until the permanent sign is installed. Existing signs and poles shall be reinstalled in accordance with the applicable requirements for installing new signs and poles. Relocated steel posts and clamps shall be field painted two coats after the posts have been erected. The first coat shall be a zinc-dust primer paint meeting Federal Specification TT-P-641B Type II. The second coat shall be bright aluminum paint, aluminum-dust Type II, Class 3 brightness, meeting Federal Specification TT-A-468 with a minimum of 2 lb/gal, with vehicle meeting or exceeding Federal Specification TT-V-109. Scratches shall be touched up after the erection of the sign panels. The touchup shall be with both primer and finish coat. Sign pole surfaces to be painted shall be cleaned and dry when the paint is applied. No painting shall be done in damp weather nor when the air temperature is below 40°F.

645.08 Method of Measurement Demount Signs, Demount Poles, Reinstall Signs, and

Reinstall Poles will be measured by each unit. Bridge-type, cantilever and butterfly-type Sign Support Structures, including the foundations and sign panels, complete in place, as called for on the Contract Plans, will be measured by each unit. Bridge-Mounted Guide Signs, including supports, will be measured by each unit in place. Breakaway devices (1 per pole) shall be measured by the unit complete in place and accepted. The area of roadside guide signs, regulatory, warning, confirmation and route marker assembly signs of the respective types, will be measured by the area in square feet, computed to nearest hundredth of a square foot, as determined by the overall height multiplied by the overall width. Aluminum poles for roadside guide signs, Type I will be measured by the number of units of each diameter, complete in place. Steel H-beam poles will be measured for payment by the pound, determined from the nominal weight per foot for each size and the lengths as indicated on the Contract Plans. Demountable reflectorized delineators will be measured by the number of units of each type in place. 6-145 All beacons installed on an individual post/pole shall constitute a single installation. Each installation will be measured for payment by the lump sum in place

645.09 Basis of Payment The accepted demounted signs and demounted poles will be

paid for at the contract unit price each for the respective item specified. Such price will be full compensation for delivering signs and poles not to be reinstalled to a site designated by the Resident, and all other incidentals necessary to complete the work. The accepted reinstalled signs or reinstalled poles will be paid for at the contract unit price each. Such price will be full compensation for furnishing new hardware, when required, and all incidentals necessary to complete the installations. All signs or poles designated to be reinstalled that are damaged by the Contractor shall be replaced by the Contractor with new signs or poles conforming to the applicable Specifications at no additional cost to the State. The accepted bridge-type, cantilever and butterfly-type Sign Support Structures will be paid for at the contract lump sum price for the respective items. Such price will be full compensation for the signs, support structures, foundations, and incidentals necessary to complete the work, including design of the sign supports. The accepted guide signs-overpass mounted, will be paid for at the contract lump sum price for the respective items, which price will be full compensation for the signs, supports and incidentals necessary to complete the work, including design of the sign supports. The accepted roadside guide signs and regulatory, warning, confirmation, and route marker assembly signs will be paid for at the contract unit price per square foot. Such payment will be full compensation for furnishing and installing signs, assembly hardware, and all incidentals necessary to complete the work, including design of the sign supports. The accepted aluminum poles will be paid for at the contract unit price each for the specified diameter, complete in place. The accepted demountable reflectorized delineators will be paid for at the contract unit price each for the type specified, which payment will be full compensation for delineator and post or bridge rail mounting, complete in place. Payment for breakaway devices shall be full compensation for furnishing and installing the device, all required pole cutting, for adapting the pole to the breakaway device, for adapting the concrete base to the breakaway device and all other incidentals necessary to complete the work. Separate payment will be made at the respective contract unit prices for demounting and reinstalling the signs and the poles at multi-pole installations. At single- pole installations, separate payment will be made at the respective contract unit prices for demounting and reinstalling the poles only. 6-146 The accepted quantity of steel H-beam poles will be paid for at the contract unit price per pound, complete in place as shown on the Contract Plans or as designated. Furnishing and installing posts for Type II signs, including earth excavation and backfilling, furnishing and placing assembly hardware, backfilling material, loam, seed and other incidentals, will not be paid for directly but will be considered incidental to the cost of the signs they support. Sign Mounted Beacon Arrays will be paid for at the contract lump sum price, which payment will be full compensation for furnishing all materials including, but not limited to the LED-arrays, flasher, timer, controller cabinets, wiring, pedestrian push buttons, solar panels, batteries, radio devices, radar units, and all appurtenances and incidentals required for a complete and functioning installation and for furnishing all tools and labor necessary for completing the installation. Array must meet all testing and connection requirements of this section All work, PVC Pipe, Aggregate for Untreated Surface Course and Leveling Course, Underdrain Backfill Material and other materials furnished to install, backfill around, and fill the sleeve in the island and place the sign post in the sleeve shall be incidental to the Payment for excavation of solid bedrock for the placement of wood poles will be made under Item 206.07. Payment will be made under: P a y I t e m P a y U n i t 645.103 Demount Guide Sign E a c h 645.106 Demount Regulatory, Warning, Confirmation and Each R o u t e M a r k e r A s s e m b l y S i g n 645.108 Demount Pole E a c h 645.113 Reinstall Guide Sign E a c h 645.116 Reinstall Regulatory, Warning, Confirmation and Each Route Marker Assembly Sign 645.118 Reinstall Pole E a c h

645.12 Overhead Guide Sign: (STA X + XXX) L u m p S u m

645.13 Bridge Overpass-Mounted Guide Sign: L u m p S u m

(STA X + XXX) (Left/Right XX)

645.14 Special Work No.: L u m p S u m

645.15 Cantilever Guide Sign: (STA X + XXX) L u m p S u m

645.161 Breakaway Device Single Pole E a c h 645.162 Breakaway Device Multi Pole E a c h 645.251 Roadside Guide Signs, Type I S q u a r e F o o t 645.261 Bridge Guide Sign, Type I S q u a r e F o o t 645.271 Regulatory, Warning, Confirmation and S q u a r e F o o t 6-147 R o u t e A s s e m b l y S ign, Type I 645.281 5 Inch Aluminum Pole E a c h 645.282 6 Inch Aluminum Pole E a c h 645.283 7 Inch Aluminum Pole E a c h 645.284 8 Inch Aluminum Pole E a c h 645.285 10 Inch Aluminum Pole E a c h 645.286 12 Inch Aluminum Pole E a c h 645.289 Steel H-Beam Poles P ounds 645.291 Roadside Guide Signs Type II S q u a r e F o o t 645.292 Regulatory, Warning, Confirmation and S q u a r e F o o t Route Marker Assembly Signs Type II 645.301 Demountable Reflectorized Delineator, Single Each 645.302 Demountable Reflectorized Delineator, Double Each 645.305 Sign Mounted Beacon Array L u m p S u m SECTION 646 through 651 VACANT

Highway Signing in other states

• Florida 700 · HIGHWAY SIGNING
• Iowa 2524 · Highway Signing
• Missouri 903 · Highway Signing
• Tennessee 713 · HIGHWAY SIGNING