Τ−10 rod using a #6 bare ground wire.
T.05.03.3 Metal Pull Boxes. Pull boxes, when used in cast-in-place bridge parapets or barrier, shall conform to the details indicated on the Plans and shall be adequately anchored in place to prevent displacement during concrete pouring operations. Surface mounted pull boxes shall be anchored with stainless steel mechanical anchors. T.05.03.4 Excavation. Excavation for precast handholes and pull boxes shall be completed as nearly as practicable to the dimensions shown on the Plans. T.05.04 METHOD OF MEASUREMENT. “Precast Type “A” Handholes,” “Precast Type B Heavy Duty Handholes,” “Precast Type “H” Heavy Duty Handholes,” and “Type “V” Pull Boxes” and “Type “W” Pull Boxes” will be measured by the number of units of each type actually installed in accordance with the Plans and/or as directed by the Engineer. T.05.05 BASIS OF PAYMENT. The accepted quantities of “Preca st Type “A” Handholes,” “Precast Type B Heavy Duty Handholes,” “Precast Type “H” Heavy Duty Handholes,” “Type “V” Pull Boxes” and “Type “W” Pull Boxes” will be paid for at their respective contract unit prices per each such type as listed in the Proposal. The prices so-stated constitute full and complete compensation for all materials, labor, tools, and equipment including concrete, ground wire, grounding clamps and support grips, ground rods, gravel, cast iron frame and cover, grounding of frame and cover, excavation and backfill, and for all incidentals required to finish the work, complete in place and accepted by the Engineer. Payment for "Trench Excavation - Rock" will be made under the applicable provisions of
SECTION T.06
CONDUIT
T.06.01 DESCRIPTION . This work consists of furnishing and installing rigid steel conduit, polyvinyl chloride (PVC) plastic conduit, and fiberglass conduit of the size specified, including the necessary fittings, at the locations indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. T.06.02 MATERIALS. Conduit and fittings shall conform to Subsection M.15.04 of these Specifications. T.06.03 CONSTRUCTION METHODS. All work shall be performed strictly in accordance with the requirements of the National Electrical Code, latest Edition. T.06.03.1 Rigid Steel Conduit. Conduit shall be installed as shown on the Plans or as directed by the Engineer. Bends which are not smooth or which show any evidence of flattening or destruction of the protective coating will not be accepted. All joints requiring rethreading shall be made with a
Τ−11zinc-based, cold galvanized, spray-applied co mpound as approved by the Engineer, applied to the male threads. Oils shall be removed from the threads prior to applying the galvanizing compound. All threaded couplings shall be ti ghtened until the ends of the conduit are brought together to form a tight connection. A nylon pulling rope shall be installed in all conduits which do not ca rry conductors under the contract. Such pull rope shall be for subsequent use to facilitate pulling of cables. There will be no separate payment for the cost of the pull rope. Conduit bends and elbows made in the field shall have a radius of not less than twelve (12) times the inside diameter of the conduit, and all such bends shall be made without crimping, heating, denting or otherwise damaging the conduit. Conduit ends at handholes shall be supplied wi th insulated bonding bushings with threaded ends. All conduits shall be bonded to the ground rod within the handhole using #6 bare ground wire.
in non-paved areas and in paved areas where the pav ement will be replaced as part of the project under other contract items. All conduit shall be grounded in accordance with the National Electrical Code, latest Edition. Ends that have bonding clamps shall be filled with sealing compound to prevent the entrance of moisture, except at handholes. All ground lugs shall be copper, bronze or brass. Underground conduit shall be placed at a minimum depth of 24 inches under vehicular travel areas and 18 inches under non-vehicular travel areas. Conduits shall be placed on a 6-inch sand bed. Conduits within roadways shall be backfilled with Class 1 controlled low-strength material (CLSM) to the bottom of the gravel subbase. Yellow warning tape shall be placed 1 foot below finished grade. When two or more conduits are placed in the same trench, conduit spacers shall be used. Spacers shall be placed at 6-foot intervals or as directed by the Engineer. The Contractor shall immediately notify the Engineer of trench-bottom conditions that are suspected to be unsatisfactory. If the condition of the bottom of the trench is in any way unsatisfactory, as determined by the Engineer, the E ngineer may require the Contractor to excavate additional material and replace it with clean gravel to provide a firm bearing for the conduit. The backfill shall be compacted in layers not more than 6 inches in thickness before compaction. After the trench is backfilled, the Contractor shall, in the presence of the Engineer, test the installation by pushing or pulling a mandrel, not less than 1/4-inch less than the inside diameter of the conduit, through the entire length of the conduit. All debris, including stones and dirt, shall be removed. All damaged conduit shall be removed and replaced at the Contractor's expense.
conduit placed under existing paved areas where removal of the pavement is required only for the placement of conduit and the pavement is to be restored as part of this item. Conduit under existing pavement shall be placed in accordance with all applicable requirements of Para. a of this Subsection. The pavement shall be replaced in accordance with the Plans regardless of the method of excavation. When conduit is placed in existing paved sidewalks, the sidewalk shall be replaced in accordance with Subsection T.01.03.11 of these Specifications.
and/or hangers at intervals not exceeding 5 feet or as directed. All clamps and hangers shall be
Τ−12 galvanized. A weatherhead shall be installed on all risers.
rigidly supported in the concrete form by methods and materials which will not cause injury to the zinc coating of the conduit. Conduit installations on bridges and other structures shall be provided with expansion fittings at all structure expansion joints. The expansion joint fittings shall be installed as shown on the Plans and meet the requirements of Subsection M.15.04.3 of these Specifications.
T.06.03.2 PVC Plastic Conduit. PVC plastic conduit shall be in stalled as shown on the Plans and in conformity with the requirements previously specified in Subsection T.06.03.1 except those referring specifically to rigid steel conduit. PVC plastic conduit shall be installed with bell ends on the inside of each handhole. T.06.03.3 Fiberglass Conduit. Fiberglass conduit shall be insta lled as shown on the Plans and in conformity with the requirements previously specified in Subsection T.06.03.1 except those referring specifically to rigid steel conduit. T.06.04 METHOD OF MEASUREMENT. "Rigid Steel Conduit," "PVC Plastic Conduit", and “Fiberglass Conduit” will be measured by the number of linear feet actually installed of the type or types indicated on the Plans and/or as directed by the Engineer, with no deduction for fittings and couplings.
T.06.05 BASIS OF PAYMENT. T.06.05.1 Conduit Underground. The accepted quantities of "Rigid Steel Conduit -Underground" and "PVC Plastic Conduit - Underground" will be paid for at their respective contract unit prices per linear foot for the type or types as listed in the Proposal. The prices so-stated constitute full and complete compensation for furnishing all materials, equipment, tools, and labor including fittings, couplings, saw cutting pavements, excavation and backf ill, Class B bedding, restoration of existing ground surfaces including all materials necessary for such restoration, testing, and all incidentals necessary to satisfactorily finish the work, complete in place and accepted by the Engineer. T.06.05.2 Conduit Under Existing Pavement. The accepted quantities of "Rigid Steel Conduit - Under Existing Pavement" and "PVC Plastic Conduit - Under Existing Pavement" will be paid for at their respective contract unit prices per linear foot for the type or types as listed in the Proposal. The prices so-stated constitute full and complete compensation for furnishing all materials, equipment, tools, and labor including fittings, coup lings, saw cutting, excavation and backfill, Class B bedding, restoration of existing pavements and sidewalks including all materials necessary for such restoration, testing, and all incidentals required to finish the work, complete in place and accepted by the Engineer. T.06.05.3 Conduit Overhead. The accepted quantities of "Rigid Steel Conduit - Overhead" and "PVC Plastic Conduit - Overhead" will be paid for at their respective contract unit prices per linear foot for the type or types as listed in the Proposal. The prices so-stated constitute full and complete compensation for furnishing all materials, equipment, tools and labor, including fittings, couplings, clamps and hangers, weatherhead, and all incidentals required to finish the work, complete in place and accepted by the Engineer.
Τ−13T.06.05.4 Rigid Steel or PVC Plastic Conduit In Structure. The accepted quantities of rigid steel or PVC plastic conduit in structure will be paid for at their respective contract unit prices per linear foot for the various types as listed in the Proposal. The prices so-stated constitute full and complete compensation for furnishing all materials, equipment, tools and labor, including fittings, couplings, and all incidentals necessary to satisfactorily fini sh the work, complete in place and accepted by the Engineer. T.06.05.5 Fiberglass Conduit On Structure. The accepted quantities of "Fiberglass Conduit On Structure" will be paid for at the contract unit prices per linear foot of conduit as listed in the Proposal. The price so-stated constitutes full and complete compensation for furnishing all materials, equipment, tools and labor, including fittings, hangers and support systems, expansion fittings, and all incidentals necessary to satisfactorily finish the work, complete in place and accepted by the Engineer.
T.06.05.6 Expansion Couplings. The accepted quantities of expansion couplings of various types will be paid for at the contract unit price per each as listed in the Proposal. The price so-stated constitutes full and complete compensation for furnishing all materials, equipment, tools and labor, and all incidentals necessary to satisfactorily finish the work, complete in place and accepted by the Engineer.
SECTION T.07
LUMINAIRES
T.07.01 DESCRIPTION . This work consists of furnishing and installing 250- or 400- watt high pressure sodium cutoff luminaires on appropriate lighting standards, and understructure luminaires, along with their supports and protective screens, at the locations indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. T.07.02 MATERIALS. Luminaires, understructure luminaires and photo-electric controls shall conform to Subsection M.15.05 , of these Specifications.
T.07.03 CONSTRUCTION METHODS. T.07.03.1 High Pressure Sodium Luminaires. The 250- or 400-watt high pressure sodium luminaires shall be installed as shown on the Plans or directed by the Engineer. Luminaires shall be securely attached to ends of arms and shall be accurately plumbed, with the luminaire reflector properly and accurately placed. Note: Luminaires installed on bridges must be secured with a belt through end of davit arm in addition to the manufacturer’s recommendation due to possible vibration of the bridge span. T.07.03.2 Understructure Luminaire with or without Protective Screen. Angle iron shall be drilled to accept wire mesh. Wire mesh ends shall be crimped at every end into holes in the angle iron. The protective screen shall be of the size indicated on the Plans and shall be secured to the bridge structure with galvanized "C" clamps located in each corner. The furnishing and installing of
Τ−14 supports for the understructure luminaires shall include 3/4-inch conduit installed between the luminaire and the junction box. The high-pressure understructure luminaire shall be furnished and installed as indicated on the Plans and/or as directed by the Engineer. Tunnel or underpass luminaries without protective screens shall be specified and ordered with tempered rated glass lens. T.07.04 METHOD OF MEASUREMENT. T.07.04.1 High Pressure Sodium Luminaires. "250-Watt High Pressure Sodium Luminaires" or “400-Watt High Pressure Sodium Luminaires" will be measured by the number of units of each type actually installed in accordance with the Plans and/or as directed by the Engineer. T.07.04.2 Understructure Luminaire with Protective Screen. "Understructure Luminaire with or without Protective Screen" will be measured by the number of units actually installed in accordance with the Plans and/or as directed by the Engineer. T.07.05 BASIS OF PAYMENT.
T.07.05.1 High Pressure Sodium Luminaires . The accepted quantities of "250-Watt High Pressure Sodium Luminaires" or “400-Watt High Pr essure Sodium Luminaires" will be paid for at the contract unit price per each as listed in the Proposal. The price so-stated constitutes full and complete compensation for all materials, equipment, tools and labor, including ballast, lamp and photo-electric control, and all incidentals required to finish the work, comple te in place and accepted by the Engineer. T.07.05.2 Understructure Luminaire with or without Protective Screen. The accepted quantities of "Understructure Luminaires with or without Protective Screens" will be paid for at the contract unit price per each as listed in the Proposal. The price so-stated constitutes full and complete compensation for all materials, including angle, mesh and clamps for the protective screen, luminaire support, luminaire, ballast, photo-electric cell (if needed), lamp and conduit, and all labor, tools, equipment and all incidentals required to finish the work, complete in place and accepted by the Engineer.
SECTION T.08
ALUMINUM LIGHTING STANDARDS AND FOUNDATIONS
T.08.01 DESCRIPTION. This work consists of furnishing and installing aluminum lighting standards, foundations, anchor bolts, in-line fused and unfused kits, and breakaway support couplings of the sizes and at the locations indicated on the Plans or as dire cted by the Engineer, all in accordance with these Specifications.
T.08.02 MATERIALS. T.08.02.1 Light Standards. Light Standards shall conform to Subsection M.15.06.1 of these Specifications.
Τ−15T.08.02.2 Light Standard Foundations. Light standard foundations shall conform to Subsection M.15.06.2 of these Specifications.
T.08.03 CONSTRUCTION METHODS. T.08.03.1 Light Standards. Lighting standards shall be securely bolted to foundations in a vertical position employing approved shims if necessary. Arms shall be securely attached to poles in such a manner as to develop the full design strength of the arm and shall be aligned perpendicular to centerline of roadway. The use of breakaway support couplings shall be limited to pole heights that provide luminaire mounting heights of 50 feet or less and a total pole, arm and luminaire weight of 600 pounds or less. T.08.03.2 Light Standard Foundations.
to the dimensions shown for the concrete foundation. All loose material shall be removed before the forms are installed. All conduits, ground rods, reinforcing steel and anchor bolts shall be installed rigidly in place before the concrete is placed. Anchor bolts shall be spaced by means of a template furnished by the pole manufacturer. Anchor bolts and conduit extending above the top of the base shall be wrapped with oiled burlap for protection until the post is mounted on the base. The concrete shall be placed in accordance with SECTION 808; CAST-IN-PLACE STRUCTURE CONCRETE MASONRY of these Specifications.
Grounding shall be accomplished through the ground rod in the associated handhole with a bare copper ground wire. If there is no associated handhole, and when called for in the Plans, a ground rod shall be installed in the light standard foundation. The ground rod shall extend 3 inches above the top of the base and shall be equipped with a copper clamp to secure the ground wire.
After the concrete foundation has been placed, finished level and cured, forms shall be removed. The area around the concrete base shall be backfilled and compacted in 6-inch uniform layers. Available stones in the area shall be used to chink the backfill to insure the concrete foundation remains in a stable vertical position.
The Contractor shall protect the foundation and anchor bolts until the system is fully accepted by the State. Foundations or anchor bolts damaged, prior to final acceptance, shall be replaced at no additional cost to the State. After backfilling, all pavement or surface treatment which has been disturbed by the construction operation shall be replaced with similar material in a manner satisfactory to the Engineer at no additional cost to the State. The site shall be neatly trimmed and left in a satisfactory condition. All excess materials shall be removed and disposed of by the Contractor in accordance with the applicable requirements of SECTION 202; EXCAVATION AND EMBANKMENT of these Specifications.
Τ−16 b. Precast Units. Precast foundation units shall be manufactured in accordance with the applicable provisions of SECTION 601 and SECTION 809; PORTLAND CEMENT CONCRETE and PRECAST/PRESTRESSED STRUCTURE CONCRETE MASONRY , respectively, of these Specifications.
the top of the unit.
with the applicable details indicated on the Plans. Dimension of units shall be accurate within the following tolerances. Dimension Tolerance ±
Greater than 0" to 12" 1/4" Greater than 12" to 24" 1/2" Greater than 24" to 72" 3/4"
manufacture and on the project site. Any units showing defects or damage shall be removed and replaced by the Contractor at no additional cost to the State.
with Subsections 302.03.1 and 302.03.2 of these Specifications.
and grades shown on the Plans. Care shall be exercised during hauling, storage, hoisting and handling of the units to prevent cracking or damage. No damaged units shall be installed. Units showing defects or damage shall be removed and replaced or repaired by the Contractor at no additional cost to the State. Foundations shall be installed such that no portion of the foundation or any non-breakaway portion of the installation extends more than 4-in ches above the finished grade. Measurement shall be made in accordance with Section 12.5.3; Additional Requirements of the AASHTO Standard Specifications for Structural Supports for Highway Signs and Traffic Signals.
T.08.03.3 Breakaway Support Couplings. The installation instructions shall be in strict conformance with the manufacturer's recommendations, using torque control nuts or galvanized steel hex nuts which yield at the load specified by the manufacturer. T.08.04 METHOD OF MEASUREMENT. T.08.04.1 Light Standards. "Light Standards" will be measured by the number of units actually furnished and installed in accordance with the Plans and/or as directed by the Engineer.
Τ−17T.08.04.2 Light Standard Foundation with Anchor Bolts . "Light Standard Foundations with Anchor Bolts" will be measured by the number of units actually furnished and installed in accordance with the Plans and/or as directed by the Engineer.
The 2-inch rigid steel conduit contained within the concrete base and the first 4 inches outside thereof will be considered as part of the foundation unit and will not be paid for separately. T.08.04.3 Breakaway Support Couplings .
measured separately for payment but will be included in the payment for "Light Standard Foundation with Anchor Bolts.”
be measured by the number of existing foundations on which a set of four such couplings are to be installed, all in accordance with the Plans and/or as directed by the Engineer. T.08.05 BASIS OF PAYMENT.
T.08.05.1 Light Standards. The accepted quantities of "Light Standards" will be paid for at the contract unit price per each as listed in the Proposal. The price so-stated constitutes full and complete compensation for all materials including poles, cast aluminum bases, ground wire, ground lugs, grounding bushings, in-line fused or unfused kits, No. 10 AWG cable between the luminaire and the in-line fused or unfused kits, and for all labor, tools, equipment and incidentals required to finish the work, complete in place and accepted by the Engineer.
T.08.05.2 Light Standard Foundations with Anchor Bolts. "Light Standard Foundations with Anchor Bolts" will be paid for at the contract unit price per each as listed in the Proposal. The price so-stated constitutes full and complete compensation for all materials, including anchor bolts, breakaway support couplings, ground rods, reinforcing steel, conduit, conduit couplings, washers and nuts, excavation, backfilling and compaction, repl acing flexible pavement, concrete, or other surface treatment, and for all labor, tools, equipment and incidentals required to finish the work, complete in place and accepted by the Engineer. Allowance for rock excavation shall be made for a distance of one foot outside the foundation and 6 inches below the bottom of the foundation, as constructed, and will be paid for as "Trench Excavation - Rock" under the applicable provisions of SECTION 205; TRENCH EXCAVATION, of these Specifications. T.08.05.3 Furnish and Install Breakaway Support Couplings on Existing Light Standard Foundations. "Furnish and Install Breakaway Support Couplings on Existing Light Standard Foundations" will be paid for at the contract unit price per each existing foundation as listed in the Proposal. The price so-stated constitutes full and complete compensation for all materials, labor, tools and equipment, including furnishing and installing breakaway support couplings on each existing light standard foundation anchor bolt, remo ving and resetting existing light standards on the existing foundations, extending existing conduit stubs, and all incidentals required to finish the work, complete in place and accepted by the Engineer.
Τ−18 SECTION T.09
SERVICE PEDESTAL T.09.01 DESCRIPTION . This work consists of furnishing and placing the service pedestal, the service riser, concrete mat, and anchor bolts at the locations indicated on the Plans or as directed by the Engineer, complete in every respect, fully wired, thoroughly tested and ready for use, all in accordance with these Specifications. Electric service shall be as specified on the Plans, and available at the indicated transformer. The Contractor shall provide the conductors of the size indicated. T.09.02 MATERIALS. All materials for this item of work shall conform to Subsection M.15.07; Service Pedestal , of these Specifications.
T.09.03 CONSTRUCTION METHODS. All work shall be performed in accordance with the National Electric Code and the National Electric Safety Code. The service pedestal shall be installed as shown on the Plans or as directed by the Engineer. The work under this item shall include all conduit contained within the concrete base. The pedestal shall be installed on the concrete mat as indicated on the Plans with the power distribution panel mounted inside. The concrete pad shall be placed on 12 inches of gravel subbase. The enclosure shall be made watertight. A bead of silicon sealer shall be applied to the base of the cabinet, inside and out. All electrical conductors within the cabinet shall be enclosed in PVC conduit. The electrical compo-nents shall be mounted with machine screws and wired as shown on the Plans or as directed. All rigid steel conduits in the service cabinet shall be bonded together and grounded to the cabinet with No. 6 AWG bare copper conductors. A ground grid system consisting of four (4) ground rods and #2 bare copper wire shall be installed around the foundation and as shown in the Standard Details. Foundation rebar and pedestal enclosure are to be bonded to the ground grid. The Contractor shall provide a shop drawing of the service pedestal foundation showing the location of all conduit.
T.09.04 METHOD OF MEASUREMENT . "Service Pedestal" will be measured by the number of units actually furnished and installed in accordance with the Plans and/or as directed by the Engineer. T.09.05 BASIS OF PAYMENT. The accepted quantities of "Service Pedestal" will be paid for at the contract unit price per each as listed in the Proposal. The price so-stated constitutes full and complete compensation for all material, labor and equipment, including furnishing and installing the service pedestal, anchor bolts, concrete foundation, grounding system, crushed stone, excavation and backfill, meter socket, contactor, panelboard, photo control, relays, neoprene gasket, grounding bushings and ground wire, and for all incidentals required to finish the work, complete in place and accepted by the Engineer.
Τ−19 SECTION T.10
TRAFFIC SIGNAL SYSTEMS T.10.01 DESCRIPTION. This work consists of furnishing and installing all necessary materials and equipment in order to complete the new traffic signal systems, at the locations designated on the Plans and/or as directed by the Engineer, all in accordance with these Specifications. Reference is made to the following Sections which are relevant to traffic signal systems. SECTION T.01; ELECTRICAL WORK SECTION T.03; GROUND RODS AND BARE GROUND WIRE SECTION T.04; WIRE AND CABLE SECTION T.05; HANDHOLES, MANHOLES AND PULL BOXES SECTION T.06; CONDUIT SECTION T.11; TRAFFIC SIGNAL STANDARDS AND POSTS SECTION T.12; TRAFFIC SIGNAL CONTROLLERS SECTION T.13; TRAFFIC SIGNAL DETECTORS AND RELAYS SECTION T.14; TRAFFIC SIGNAL HEADS T.10.02 MATERIALS. Signal heads, controllers, standards and posts, electrical conduits and fittings, wire and cable, detectors and relays, handholes, and pull boxes shall conform to the applicable requirements of SECTION M.15; TRAFFIC CONTROL SYSTEMS , of these Specifications, and the National Electric Code. Concrete for foundations shall be as specified in SECTION 601; PORTLAND CEMENT CONCRETE , of these Specifications.
Unless otherwise indicated on the Plans or specified, all materials shall be new. T.10.02.1 Warranties for Traffic Signal Systems.
each manufacturer on all electrical or mechanical equipment pertinent to the complete and satisfactory operation of traffic signal installations shall be turned over to the Department at the time of acceptance at no cost to the Department. Each warranty so furnished shall indicate its expiration date, and be in effect for a period equal to the customary trade practice.
operation of the mechanical and electrical equipment and related components for six months following the acceptance of the contract by the State. During this period, it will be the Contractor’s responsibility, when notified by t he Engineer, to repair or replace equipment or materials necessary to insure satisfactory operation of the system, and to correct malfunctions attributable to installation deficiencies. The Contractor, at his own expense, must install a temporary traffic controller and replace any auxiliary equipment in the control cabine t, as approved by the Engineer, when the approved traffic controller or auxiliary equipment must be removed from the job site for repairs in order that the traffic signal system is operating immediately after the Contractor has been notified of any breakdown or malfunction of any unit.
Τ−20 The Contractor, at his own expense, must install a new controller that meets the Plans and Specifications of the contract and the approval of the Engineer when the approved traffic controller cannot be repaired within 30 days after any breakdown or malfunction of any controller part. The new controller must conform to the Plans and these Specifications. The Contractor will be back-charged by the Maintenance Division of the Rhode Island Department of Transportation for all tools, workmanship, parts, equipment and all appurtenances necessary to repair or replace any controller part or auxiliary equipment in the control cabinet that malfunctions within the above guarantee period in order to maintain the traffic signal system in proper operating condition at all times as approved by the Engineer. All workmanship, parts, tools, equipment and all appurtenances necessary to correct malfunctions attributable to installation deficiencies are to be supplied by the Contractor at his own expense. Any labor necessary to comply with the requirements of the manufacturer’s and Contractor’s warranties will be compensated by force account. T.10.03 CONSTRUCTION METHODS . The applicable requirements of Subsections T.01.03, T.03.03, T.04.03, T.05.03, T.06.03, T.11.03, T.12.03, T.13.03 , and T.14.03 shall apply.
Poles, pedestals and controller cabinets shall be se curely bolted to foundations in a vertical position, employing approved shims if required. Push button assemblies shall be accurately positioned and securely fastened in place. Push button assemblies shall be installed on poles, pedestals, wrought iron pipe standards or on controller cabinets as shown on the Plans, to form the push button stations. Mast arm poles, span poles, controller cabinets, and signal heads shall be positioned as shown on the Plans or as directed by the Engineer. The final location shall be approved by the Engineer in the field prior to installation. All wiring shall be installed, and the bonding and grounding shall be performed in conformance with the Plans, the requirements of the National Electric Code, and requirements of Subsection T.01.03.2.
In addition, all splices made in wiring signals shall be made inside the signal heads at the provided terminal strips. Rigid steel conduits, poles, pedestals, detectors, controller cabinets, and pedestrian push button stations shall be effectively bonded and grounded. All improvements and equipment disturbed, damaged, or removed during foundation construction shall be removed and replaced or repaired to the satisfaction of the Engineer at no additional cost to the State. Incidental parts not shown on the Plans or specified, which are required to complete the traffic signal or other electrical systems, shall be furnished and installed as though such parts were shown on the Plans or specified, at no additional cost to the State. All systems shall be complete and in operation to the satisfaction of the Engineer at the time of completion of the work. All such incidental parts shall be approved by the Engineer prior to installation.
Τ−21T.10.04 METHOD OF MEASUREMENT. "Traffic Signal Systems" will not be measured separately but will be included in the measurements of specific items such as conduit, cable, controllers, signal heads, etc. Refer to SECTIONS T.04 through T.06 and T.11 through T.14 for specific methods of measurement. T.10.05 BASIS OF PAYMENT. "Traffic Signal Systems" will not be paid for separately but will be included in the price of specific items as outlined in Subsection T.10.04.
Full compensation for all additional materials and labor, not shown on the Plans or specified, which are necessary to complete the installation of the traffic signal systems, shall be considered as included in the prices bid for t he individual items, and no additional allowance will be made therefor.
SECTION T.11
TRAFFIC SIGNAL STANDARDS AND POSTS T.11.01 DESCRIPTION . This work consists of furnishing and installing Galvanized Steel Mast Arms and Poles with Foundations, Galvanized St eel Span Poles with Foundations, and Wood Span Poles at the locations indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. T.11.02 MATERIALS. T.11.02.1 Design. Traffic signal poles, mast arms, span poles, connections, clamps, anchor bolts, shoe bases and all other members shall be designed and fabricated in accordance with the require-ments of the latest edition (and interim specifications) of the AASHTO "Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals," and shall be designed to withstand the specified forces including those produced by a basic wind speed of 130 miles per hour. The span poles shall be designed to withstand a dead load cable sag of 5 percent of the span length and for a maximum allowable dead load pole deflection as specified in Subsection T.11.03.2 . The Engineer reserves the right to reject a pole design if the calculated deflection exceeds that specified therein. Vibration mitigation devices will not be allowed.
All traffic signal structures must comply with fatigue Category II requirements, including galloping, vortex shedding (if applicable), natural wind gusts, and truck induced gusts. The truck induced loading is based on 30 mph velocity. Cantilever traffic signal structures that have tapers of 0.14 inches per foot or greater are not susceptible to vortex shedding. Structure components and their connections shall be designed to resist the worst-case fatigue loading, upon evaluation of all applicable cases acting separately.
Τ−22 The design of anchor bolts shall result in a ductile steel failure prior to any sudden brittle failure of the concrete. When the clearance between the bottom of the leveling nuts and the top of the concrete is equal to or greater than one bolt diameter, bending stresses in the anchor bolts shall be considered in the design. The following notes shall be included on all plans and/or shop drawings in reference to anchor bolts: Pretensioning of all anchor nuts is required, and shall be accom-plished by tightening to 1/6 th turn beyond the snug-tight position.
The maximum clearance between the bottom of the leveling nuts and the top of the concrete is critical and shall not exceed the amount specified on the drawing. T.11.02.2 Manufacture. Traffic signal mast arms and poles and span poles shall be manufactured with high strength, galvanized steel. If the pole or mast arm is manufactured in two pieces, the sections shall be joined by an approved method. All materials for the structure, including anchor bolts, bolt covers, and hardware must meet the appr oval of the Engineer. The threaded ends of the anchor bolts and the nuts and lock washers shall be hot-dipped galvanized in accordance with ASTM A153 or A123. T.11.03 CONSTRUCTION METHODS. Standards and posts for traffic signals shall be installed as indicated on the Plans and shall conform to the following requirements: T11.03.1 Steel Poles.
fabrication shops.
section or tapered, and shall be capable of withstanding the applied load shown on the Plans with the maximum deflection as indicated above without the necessity of a back guy. Traffic signal poles shall be installed in accordance with the National Electric Safety Code. A maximum static deflection of 4 inches, without wind load, will be permitted for span poles not over 35 feet in height, and 4½-inches for span poles greater than 35 feet in height. Static deflection shall be measured by the Engineer with the span wires and signal heads in place. The span poles shall be raked back to allow for the anticipated dead load pole deflection as indicated in the Shop Drawings such that the final position of the poles under dead load is essentially vertical. The shop drawings shall indicate the theoretical dead load deflection.
T.01.03.1. The dimensions and reinforcing steel shall be in accordance with the requirements of the Plans. In the event that the design loads produce a base moment in excess of those indicated on the Plans, the Contractor will be required to pr ovide at its own expense, a foundation design by a
Τ−23Rhode Island Registered Professional Engineer in accordance with the AASHTO Standard Specifications and detailed similarly to the Plans. The use of grout under base plates is generally not be permitted. If specific conditions warrant its use, the grout shall not be considered load carrying. Loads shall be directly supported by the anchor bolts. Adequate drainage shall be provided. Headed cast-in-place anchor bolts shall be used in lieu of hooked anchor bolts.
The top 12 inches of the foundation shall be formed, and the remainder shall be cast against undisturbed earth. If adjacent earth is disturbed or removed beyond the neat lines of the foundation, it shall be replaced with concrete fill. This excavation shall be no larger than 1 foot greater than the dimension of the foundation, unless authorized by the Engineer. The top of foundation shall be set to finished grade and finished level. After curing, the forms shall be removed and backfilled with suitable material and compacted in 12-inch layers. T.11.03.2 Wood Poles . Wood poles used for span wire suspensions shall conform with the applicable requirements of Subsection M.15.07.6 , of these Specifications. The hole to receive the pole shall be 6 feet in depth and 28 inches to 32 inches in diameter. The pole, after being placed into position, shall be backfilled with a one-foot layer of crushed rock or coarse gravel and the remaining space shall be backfilled with earth, tamped down in 12-inch intervals until the hole is filled. Guy anchors required for wood poles shall be installed in accordance with the following: Contact Area of Anchor: Normal soil conditions: 192 sq. in. minimum Sandy or marshy conditions: 300 sq. in. minimum Minimum depth of anchor hole: 5.5 feet. Anchor rod: 5/8" x 7', double eye. Eye shall project above grade 4" to 6.” Dig channel for rod to line up guy. Fit anchor in hole with anchor rod laying in channel. Tamp crushed stone or coarse gravel between anchor face and undisturbed earth. Backfill all removed earth, compacted in 1-foot laye rs.
T.11.04 METHOD OF MEASUREMENT. "Galvanized Steel Mast Arms and Poles and Foundations," "Traffic Signal Standards - Galvanized Steel and Foundations," and "Traffic Signal Standards - Wood" will be measured by the number of units of each such type actually installed in accordance with the Plans or as directed by the Engineer. T.11.05 BASIS OF PAYMENT. The accepted quantity of "Galvani zed Steel Mast Arms and Poles and Foundations," "Traffic Signal Standards - Galvanized Steel and Foundations," and "Traffic Signal Standards - Wood" will be paid for at their respective contract unit prices per each such type as listed in the Proposal. The prices so-stated constitute full and complete compensation for all design, materials, labor, tools, equipment and all incidentals required to finish the work, complete in place and accepted by the Engineer.
Τ−24 SECTION T.12
TRAFFIC SIGNAL CONTROLLERS AND CABINETS T.12.01 DESCRIPTION . This work consists of supplying and installing a NEMA TS-2 Type 1 actuated traffic signal controller with internal time-base coordination and internal pre-emption capabilities at the locations indicated on the Plans or as directed by the Engineer, along with any necessary appurtenances, all in accordance with these Specifications. All controllers supplied for this project shall be identical models of current production and recent manufacture. Untried or prototype units shall not be acceptable. All software supplied shall be of the most recent revision. T.12.02 MATERIALS . Traffic Signal Controllers and Cabinets shall conform to the applicable requirements of Subsection M.15.13; Traffic Signal Controllers and Controller Cabinets of these Specifications. T.12.03 CONSTRUCTION METHODS. T.12.03.1 The New Installation . Controllers and cabinets shall be installed in strict accordance with the manufacturer’s recommendations and the latest edition of the NEMA Standards. T.12.03.2 Temporary Controllers . When traffic signal poles, signal heads, conduit conductor cable, detectors and other traffic signal appurtenances are installed, and if the specified controller is not available, the Contractor shall immediately pr ovide, at his own expense, a temporary controller capable of operating the installation as specified on the Plans. T.12.04 METHOD OF MEASUREMENT . “16-Phase Actuated Controllers, Cabinets and Foundations” will be measured by the number of units of the type or types actually installed in accordance with the Plans and/or as directed by the Engineer. T.12.05 BASIS OF PAYMENT . The accepted quantities of “16-Phase Actuated Controllers, Cabinets and Foundations” will be paid for at the contract unit price per each type or types as listed in the Proposal. The prices so-stated constitute full and complete compensation for all labor, materials, tools, and equipment, including mounting hardware, foundations, concrete work pad, ground wire, ground rod, malfunction management unit (MMU), bus interface unit (BIU), detector racks, programming and all required tests, and appurt enances, and all incidentals required to finish the work, complete and accepted by the Engineer. SECTION T.13
DETECTORS AND RELAYS T.13.01 DESCRIPTION . This work consists of furnishing and installing inductance loop vehicle detectors, loop detector relays, pedestrian detectors, and necessary wiring and appurtenances at
Τ−25the locations indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. T.13.02 MATERIALS . Loop detector wire, loop detector lead-in cable, loop detector relays, and pedestrian detectors shall conform to Subsections M.15.02.5, M.15.02.6, M.15.14 and M.15.17, respectively, of these Specifications. T.13.03 CONSTRUCTION METHODS. T.13.03.1 Scheduling Loop Detector Installations . The Contractor must schedule loop detector installations such that no roadway approach is without detection for more than 30 calendar days. Once a loop detector has been disconnected due to pavement removal, trench excavation for drainage or utility work, conduit installation, or any other construction activity, the Contractor must restore loop detection within 30 calendar days, unless otherwise authorized in writing by the Engineer.
T.13.03.2 Inductance Loop Detector Installation . Inductance loops shall be installed in accordance with the details specified on the Plans, or as directed by the Engineer. Loop dimensions shall be as specified on the Plans. Handholes, conduits and curb cuts shall be completed before beginning the loop installation. The loop shall be outlined on the pavement to conform to the specified configuration. A power saw shall be used to cut a slot in the pavement. The cut shall be of sufficient width (min. 3/8") to allow easy placement of loop wire (single or twisted pair) into the saw cut and have a depth which will place the last loop turn from 1½-i nches to 2½-inches below the final surface unless specified otherwise on the Plans. The corners shall be saw cut, cored, drilled or chipped out as indicated on the Plans. Sharp edges in the corners shall be smoothed. The intersection of saw cuts shall overlap so that the slots have full depth and a smooth bottom. Immediately after sawing, the slot and pavement shall be flushed with high pressure clean water to remove the saw slurry. Filtered compressed air shall be used to remove all dust and moisture from the slot. The installation shall not proceed until the slot is dry. Hot air may be used to dry the saw slot. To protect the loop wire at the edge of the pavement or curb, 1-inch minimum diameter flexible PVC or vinyl conduit(s) shall be installed between the pavement and handhole, in accordance with the details indicated on the Plans. The loop wire shall be installed starting at the roadside handhole, around the loop for the specified number of turns, and back to the handhole. Splices shall not be permitted outside the handhole. The wire shall be depressed in the slot without the use of sharp objects which might damage the wire insulation. The loop shall be held in place every 2 feet with 2-inch (approximate) strips of open-celled polyurethane backer rod as approved by the Engineer. These hold down strips shall be left in place when the slot is filled with roadway loop embedding sealer. Where the loop wire crosses pavement joints and cracks, the loop wires shall be further protected using the method specified on the Plans.
Τ−26 The ends of the vinyl or PVC tubing encasing the wire shall be given a waterproof seal immediately after placing the wire to prevent moisture from entering the tube. The tubing shall be of a continuous length from the curb to the handhole. The pair of loop wires between the edge of the loop and the splice to the shielded lead-in cable in the handhole shall be twisted together 3 to 5 turns per foot. The splice between the loop wires (twisted pair) and the shielded lead-in cable shall be moisture proof and shall have a dielectric strength at least equal to that of the original insulation. Moisture shall be excluded from the splice during the operation and the work shall be done in dry weather or under shelter. All parts of the splice and tools involved shall be clean and dry. Individual splices in each wire shall be staggered in a manner so as to minimize the outside diameter of the finished splice. The bared conductor ends shall be twisted and soldered and reinsulated using an electrical grade fast drying sealant and plastic polyvinyl chloride tape. The reinsulation shall extend approximately one inch onto the adjacent insulation at each end. Sufficient layers of tape shall be applied such that the thickness is one and one-half times that of the original insulation. Reinsulation of the outer jacket shall be accomplished in a similar manner except that the reinsulation shall extend approximately 4 inches onto the adjacent jacket at each end. The shielded lead-in cable shall be continued (no sp lices) from the splices to the loop wires, to the controller cabinet terminals only. The completed loop installation, including the shielded lead-in to the controller cabinet, shall have a minimum of 50 megohms leakage resistance to ground. This resistance shall be tested after the splice is made between the loop wires (twisted pair) and shielded lead-in. The Contractor, in addition to measuring the leakage to ground, shall, by test instruments capable of measuring electrical values of the in stalled loop wires and lead- ins, measure induced AC voltage, inductance in microhenries, high "Q" indication, and the resistance of the conductors in ohms. Upon measuring the loops, the Contract or shall report to the Engineer any unusual readings, or readings not in agreement with the calculated values. Testing of the loop may take place during or after the installation of the loop. When a loop is found to be not in accordance with calculated values, a new loop will be installed in its place at the Contractor's expense. The pavement temperatures shall be 40 OF and rising before the sealer is placed. All work involving the sealer shall be done in compliance with the manufacturer's specifications. When the loop embedding sealer has set sufficiently to open the loop to traffic, but the surface remains tacky, the loop may be dusted with cement to facilitate opening the loop to traffic. T.13.03.3 Pedestrian Detector Installation . Pedestrian pushbuttons shall be installed in accordance with Subsection T.10.03 of these Specifications. All pushbuttons, regardless of mounting type, shall be mounted at a height of 3 feet 6 inches. The measurement shall be made from the center of the pushbuttons to the finished sidewalk elevation. All pedestrian pushbutton detector housings shall be “Federal Yellow” in color unless the Contract calls for other signal equipment within the same intersection to be a different color. In the latter case, the color of the pushbutton detector housing shall match that of the other signal
Τ−27equipment.
Each Accessible Pedestrian Detector shall be tested in the field after initial installation in accordance with the manufacturer’s recommendations and with the Engineer present, as well as other representatives when so designated by the Contract. The programming and operation of audible speech messages, percussive tones, locator tones, and confirmation tones, as well as all other vibrotactile and visual features required, shall be tested and checked for conformance with these specifications. If any are not operating properly or to the satisfaction of the Engineer, they shall be corrected and the features re-tested until accepted by the Engineer. T.13.04 METHOD OF MEASUREMENT. T.13.04.1 Traffic Detector Loop. "Traffic Detector Loops" will be measured by the number of linear feet of saw cut actually made in accordance with the Plans and/or as directed by the Engineer. T.13.04.2 Traffic Detector Relays - Loop, 2 and 4 Channel. "Traffic Detector Relays - Loop, 2 and 4 Channel" will be measured by the number of units actually furnished and installed in accordance with the Plans and/or as directed by the Engineer. T.13.04.3 Pedestrian Detectors. “Pedestrian Detector-Pushbutton with Sign”, “Accessible Pedestrian Detector-Pushbutton with Sign”, and “Accessible Pedestrian Detector-Configuration Device” will be measured by the number of units ac tually furnished and installed in accordance with the Plans and/or as directed by the Engineer. T.13.05 BASIS OF PAYMENT. T.13.05.1 Traffic Detector Loop . The accepted quantities of "Traffic Detector - Loop" will be paid for at the contract unit price per linear foot of saw cut as listed in the Proposal. The price so-stated constitutes full and complete compensation for all materials, tools, labor and equipment, including saw cut, loop cable, flexible PVC or vinyl conduit under the curb, sealing compound, splicing and connecting, testing, and all incidentals required to finish the work, complete in place and accepted by the Engineer. When replacing existing loops, the cost of installing flexible conduit between the handhole and the curb shall be included in the cost of the loop. T.13.05.2 Traffic Detector Relays - Loop, 2 and 4 Channel. The accepted quantity of "Traffic Detector Relays - Loop, 2 and 4 Channel" will be paid for at their respective contract unit prices per each type or types as listed in the Proposal. The prices so-stated constitute full and complete compensation for all labor, materials, tools, and equipment, and all incidentals required to finish the work, complete in place and accepted by the Engineer. T.13.05.3 Pedestrian Detectors . The accepted quantity of “Pedestr ian Detectors –Pushbutton with Sign”, “Accessible Pedestrian Detector-Pushbutton with Sign”, and “Accessible Pedestrian Detector-Configuration Device” will be paid for at the contract unit price per each as listed in the Proposal. The price so-stated constitutes full and complete compensation for all labor, materials, tools and equipment, including ADA-compliant pushbuttons and housings, wiring, pedestrian signs, mounting and installation hardware, furnishing and installation of accessible pedestrian detector
Τ−28 control units, all programming, configuration, and testing required prior to and after installation of pedestrian detectors in the field, and all incidentals required to finish the work, complete in place and accepted by the Engineer. T.13.05.4 Failure to Comply. Subsection T.13.03.1 requires that no roadway approach may be without loop detection for more than 30 calendar days. If, in the judgement of the Engineer, the Contractor has failed to comply with this requirement, liquidated damages and penalties will be assessed. For each day the Engineer determines that the Contractor has failed to comply with the provisions of this Section, the daily charge set forth in Special Provision Code T.13.1000 will be deducted from monies then due the Contractor. SECTION T.14
TRAFFIC SIGNAL HEADS T.14.01 DESCRIPTION. This work consists of furnishing and installing Vehicular Signal Heads and Pedestrian Signal Heads as shown on the Plans or as directed by the Engineer, all in accordance with these Specifications. T.14.02 MATERIALS. Materials shall conform to the applicable requirements of SECTION M.15; TRAFFIC CONTROL SYSTEMS , of these Specifications. T.14.03 CONSTRUCTION METHODS. Vehicular signal heads are to be attached to mast arms and span wires with cast iron or steel signal head hanger assemblies and galvanized steel safety chains. The bottom of the signal head housing shall be mounted such that it is not less than 16 feet 3 inches above the roadway for a 3-section head or 15 feet above the roadway for a 4-section head. In no instance shall the bottom of the housing be more than 19 feet above the roadway. When mounted over a sidewalk, the bottom of a vehicular signal head shall be 10 feet above the sidewalk. Pedestrian signal heads shall be 8 feet above the finished sidewalk. The Contractor shall include 2 feet of slack in the cable to form a drip loop adjacent to the signal head. If within the duration of the Contract or before the installation has been accepted by t he State, t he signal heads are determined to be less than the minimum height, they shall be adjusted to meet the required clearance at no additional cost to the State. The signal heads shall be mounted such that the top of the assembly does not exceed the heights shown in Figure 4D-1 in the Manual of Uniform Traffic Control Devices, Millennium Edition. All new signal heads shall be supplied with red, yellow and green L.E.D. modules. The modules shall be installed in accordance with the manufacturer’s recommendations. When vehicular or pedestrian signal heads are bracket mounted to steel or aluminum poles, they shall be mounted to the pole using stainless steel straps. When vehi cular or pedestrian signal heads are mounted on wood poles, they shall be attached with bolts.
Τ−29At all new locations, work to make the system fully operational will be completed before the signal heads are installed. The heads will be installed and the system immediately put into the "flash" mode. At locations with existing signals, all new signal heads shall be covered with an opaque material upon erection, which, when in place, will assure passing motorists that the signal heads are not in operation. The covering is to remain in place until the new signal system is operational, at which time the existing signal heads shall be covered or removed. T.14.04 METHOD OF MEASUREMENT. "Vehicular and Pedestrian Signal Heads" will be measured by the number of units of the type or types actually installed in accordance with the Plans and/or as directed by the Engineer. T.14.05 BASIS OF PAYMENT. The accepted quantity of "Vehicular and Pedestrian Signal Heads" will be paid for at their respective contract unit prices per each type or types as listed in the Proposal. The prices so-stated constitute full and complete compensation for furnishing and installing all materials, tools, labor and equipment including mounting hardware, tethering hardware, safety chains, lamps, L.E.D. modules, and all incidentals required to finish the work, complete in place and accepted by the Engineer. SECTION T.15
DIRECTIONAL, REGULATORY, AND WARNING SIGNS T.15.01 DESCRIPTION. This work consists of furnishing and installing directional, regulatory, and warning signs on wood posts, square tubular steel posts, tubular steel posts, U-channels or traffic signal supports, and reflective sheeting, all in accor dance with these Specifications, at the locations indicated on the Plans and/or as directed by the Engineer. Also included is the removal and relocation of existing directional, regulatory, and warning signs. T.15.02 MATERIALS. Aluminum sheets, sign posts, reflective sheeting, and hardware shall conform to the applicable requirements of SECTION M.16; SIGNS AND SIGN SUPPORTS , of these Specifications. T.15.03 CONSTRUCTION METHODS. T.15.03.1 Preparation of Aluminum Sheets . Prior to application of reflective sheeting, the aluminum sign sheets shall be treated in strict accordance with the following procedure:
trichloroethylene. Trademark printing shall be removed with lacquer thinner or controlled alkaline cleaning system.
Τ−30 b. Preliminary cleaning shall be followed by a surface etch in a 6-to-8 percent phosphoric acid solution at 100OF followed by spraying with a cold-water rinse and immersion for one minute in circulating hot water at not less than 180OF. The surface etch shall provide a clean, non-shine or non-glare finish suitable for the application of sheeting.
cleaning and etching operations and the application of paint or reflective sheeting. There shall be no opportunity for metal to come in contact with grease, oils or other contaminants after cleaning and etching and prior to the application of paint or reflective sheeting. T.15.03.2 Sign Face. The design, color, type, size and dimensions of the sign faces shall conform to the Plans and to the applicable requirements of the latest edition and revisions of the "Manual on Uniform Traffic Control Devices. Alphabet designs of upper and lower-case letters and spacing of letters shall conform to the Standard Alphabets for Highway Signs, published by the U.S. Department of Transportation, Federal Highway Administration. The Engineer reserves the right to make any changes in sign texts prior to sign manufacture at no additional expense to the Stat e. Drawings showing dimensions, sizes, shapes and spacing of letters and arrows for all directional signs shall be submitted to the Engineer within 30 days following the award of the Contract. T.15.03.3 Application of Reflective Sheeting and Finish.
applicator method in accordance with the recommendations of the manufacturer.
not less than 3/16-inch. Heat-activated, adhesive-coated sheeting may be spliced with overlap not less than 3/16-inch or butted, gap not to exceed 1/32-inch. Only butt splices shall be permitted on signs screen processed with transparent color. Sheeting applied to extruded sections shall extend over top edges and down side legs a minimum of 1/16-inch.
coated with materials supplied and in accordance with the manufacturer's instructions. T.15.03.4 Locations. The approximate locations of the signs are shown on the Plans, but exact locations shall be determined in the field by the Engineer. Posts shall be erected plumb. Signs shall be erected to face 2 degrees away from the direction of approaching traffic so that there will be no specular glare from the reflective sheeting. Steet signs shall be mounted horizontally on the posts in accordance with standard commercial processes as approved by the Engineer. Side-of-road signs shall be mounted at locations indicated on the Plans. The height of the sign shall be determined in accordance with the Plans; the Manual on Uniform Traffic Control Devices; or as directed by the Engineer.
Τ−31T.15.03.5 Post Holes. Post holes shall be excavated to the depth and in the position shown on the Plans, or as indicated by the Engineer. A tolerance of plus or minus 3 inches will be permitted in the depth of the holes for wood posts. The exposed portions of the posts shall be set plumb and true to line and grade, and holes shall be backfilled with sound earth and tamped in 6-inch layers in such a way as not to displace the posts. Post holes to be excavated through an existing concrete or asphalt surface shall be backfilled with earth as prescribed above to within 4 inches of the original grade. After this is completed, 4 inches of concrete shall be placed in the hole and the surface leveled and finished with the original grade. When sign posts, except U-channels, are to be installed within areas where new concrete or asphalt pavement is to be placed, the following method shall be used. At the post location, a box form will be installed. The side dimension of the box form shall be 4 inches larger than the greatest dimension of the required post, but no less than 8 inches, and its depth shall be 6 inches. The box form shall be firmly anchored and shall be placed such that the top of the box is at the finished grade of the pavement. The pavement shall be in stalled around the box form. The required post hole shall then be excavated within the area of the box form, and the post will be installed, with the proper backfilling, as described above . All concrete box forms shall conform to Subsections
905.03.3(c), (d) and (g) of these Specifications
T.15.03.6 Remove and Relocate Signs. The sign panels and posts shall be relocated as a complete unit. If any hardware or posts are damaged or faulty, then posts and hardware shall be utilized from the sign assemblies removed and disposed. All costs for the replacement of damaged or faulty hardware and/or posts shall be included in this item of work. T.15.03.7 Street Signs. Street sign blade dimension, and text sizes, shall be as follows:
9-inch height and shall be used for highways with posted speeds of 40 mph or more, unless otherwise noted. All faces with 4-inch caps and 2-inch suffix c opy will trim to a 6-inch height and shall be used for highways with posted speeds of 35 mph or less, unless otherwise noted. All street signs mounted overhead will have 8-in ch caps and 5-inch suffix caps, and will be 18 inches in height, regardless of posted speed. All suffix copy shall be placed directly to t he upper right hand of the street name designation.
inch lengths for capital legend will be in accordance with the following guidelines: The majority of pre-screened faces will be 30 inc hes or 36 inches in length, and the legends shall be "D" series letters unless otherwise authorized by the Engineer. If legends in the "D" series letter size have a primary copy of 6 inches and are of such lengths as to require faces longer than 36 inches, the "C" series letter size shall be used, and the sign shall be made to the shortest of the allowable sizes (i.e., 36 inches, 42 inches, or 48 inches).
Τ−32 If legends in the "D" series letter size have a primary copy of 4 inches and are of such lengths as to require faces longer than 30 inches, the "C" series or "B" series letter size (the boldest which space allows) shall be used, and the sign sha ll be made to the shortest of the allowable sizes (i.e., 30 inches, 36 inches or 42 inches). Overhead mounted sign blades shall have a minimum length of 36 inches and a maximum length of 72 inches. Legend shall be series “D.” Spacing may be reduced by up to 25 percent if the text does not fit on the 72-inch sign blade. If the legend exceeds the 72-inch length with the reduction in spacing, then series “C” text may be us ed. Lateral spacing from the edge of the sign to the edge of the text shall not be less than 8 inches. T.15.03.8 Parking Signs.
sign is at an angle of not less that 30 degrees nor more than 45 degrees with a line parallel to the flow of traffic. The edge of the sign shall be 18 inches from the face of curb unless space does not permit, in which case the edge of sign shall be 12 inches from the face of curb. At no time will the sign be placed closer than 12 inches to the face of curb.
galvanized bolts with two 0.070 washers per bolt. T.15.03.9 Signs Mounted on Mast Arms. All signs attached to traffic signal mast arms shall include galvanized steel safety chains. The mounting bracket used for the overhead street signs will be held in place with stainless steel bands and must be adjustable such that the sign blade is perpendicular to the direction of traffic. The mounting shall hold the sign rigidly in place and resist movement in all directions. Sign blades 60 inches and greater in length shall be held in place with two brackets. T.15.04 METHOD OF MEASUREMENT. T.15.04.1. Directional, Regulatory, and Warning Signs. "Directional, Regulatory, and Warning Signs" will be measured by the number of square feet actually furnished and in stalled in accordance with the Plans and/or as directed by the Engineer. T.15.04.2 Remove and Relocate Signs. "Remove and Relocate Ground Mounted Signs" and "Remove and Relocate Directional, Regulatory and Warning Signs" will be measured by the number of units actually displaced and replaced in accordance with the Plans and/or as directed by the Engineer. T.15.04.3 Street Sign Assembly. "Street Sign Assembly" will be measured by the number of units actually furnished and installed in accordance with the Plans and/or as directed by the Engineer. T.15.04.4 Overhead Street Sign. “Overhead Street Sign” will be measured by the number of units actually furnished and installed in accordance with the Plans and/or as directed by the Engineer. T.15.04.5 Parking Signs. "Parking Signs" will be measured by the number of square feet actually furnished and installed in accordance with the Plans and/or as directed by the Engineer.
Τ−33 T.15.05 BASIS OF PAYMENT. T.15.05.1 Directional, Regulatory, and Warning Signs. The accepted quantities of "Directional, Regulatory and Warning Signs" will be paid for at the c ontract unit prices per square foot as listed in the Proposal. The price so-stated constitutes full and complete compensation for all labor, tools, materials and equipment, including posts, hardware, excavation and backfilling, and all incidentals required to finish the work, complete in place and accepted by the Engineer. T.15.05.2 Remove and Relocate Signs. The accepted quantity of "R emove and Relocate Ground Mounted Signs" and "Remove and Relocate Directional, Regulatory and Warning Signs" will be paid for at their respective contract unit prices per each as listed in the Proposal. The prices so-stated shall constitute full and complete compensation for all labor, tools, materials and equipment, including installing stockpiled materials as necessary, and all incidentals required to finish the work, complete in place and accepted by the Engineer. T.15.05.3 Street Sign Assembly. The accepted quantity of "Street Sign Assembly" will be paid for at the contract unit price per each as listed in the Proposal. The price so-stated shall constitute full and complete compensation for all labor, tools, materials and equipment, including post, sign blades (two or more as required), mounting brackets, straps, and all incidentals required to finish the work, complete in place and accepted by the Engineer.
T.15.05.4 Overhead Street Sign. The accepted quantity of “Over head Street Sign” will be paid for at the contract unit price per each as listed in the Proposal. The price so-stated shall constitute full and complete compensation for all labor, tools, materials and equipment, including sign blades, mounting hardware, galvanized steel safety chain, and all incidentals required to finish the work, complete, in place and accepted by the Engineer. T.15.05.5 Parking Signs. The accepted quantity of "Parking Signs" will be paid for at the contract unit price per square foot as listed in the Proposal. The price so-stated shall constitute full and complete compensation for all labor, materials and equipment, including posts, and hardware, and all incidentals required to finish the work, complete in place and accepted by the Engineer. SECTION T.16
GROUND MOUNTED PRIMARY DIRECTIONAL SIGNS T.16.01 DESCRIPTION. This work consists of ground mounted primary directional signs furnished and installed, including the necessary concrete bases for supporting posts, at the locations indicated on the Plans and/or as directed by the Engineer, all in accordance with these Specifications. The work also includes furnishing, fabricating, and erecting "Ground Mounted Primary Directional Sign Posts - Steel Breakaway" at locations indicated on the Plans and/or as directed by the Engineer, including all necessary foundations, breakaway couplings, and other required hardware, all in accordance with these Specifications. All work shall conform to the details shown
Τ−34 on the standard drawings entitled "Ground Mounted Primary Directional Sign Post on Breakaway Coupling." T.16.02 MATERIALS. Extruded aluminum sign panels, sign posts, reflective sheeting, text, borders, colors and hardware shall conform to the applicable requirements of SECTION M.16; SIGNS AND SIGN SUPPORTS , of these Specifications. T.16.03 CONSTRUCTION METHODS. T.16.03.1 Posts. The lengths of the posts may vary from the lengths indicated on the Plans to fit the final designated sign location and accommodate the method of setting. The Contractor is cautioned to take these contingencies into account. T.16.03.2 Foundations. Foundations shall be constructed of Class A(AE) cast-in-place concrete which conforms to the applicable requirements of SECTION 601; PORTLAND CEMENT CONCRETE , of these Specifications.
The Contractor's design for foundations founded on rock or otherwise unsuitable material shall conform to the applicable requirements contained in the most recently published edition of AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals. A 90-mph wind load shall be the design wind load. Oversized augured holes shall be filled with concrete to provide good bearing against existing soil or against newly compacted fill. If the wall along the neat lines of earth excavation collapses, the hole shall be filled in and compacted, and then re-excavated to the neat lines of the proposed footing at no additional cost to the State. T.16.03.3 Sign Panels. The requirements of Subsections T.15.03.1 through T.15.03.3 shall apply. Whenever each sign face comprises two or more pieces or panels of reflective sheeting, the sign face must be carefully matched for color at the time of fabrication in order to provide uniform appearance and brilliance during day and night. Alternate, successive width sections of either sheeting or panels must be reversed and consecutive to ensure that corresponding edges of reflective sheeting lie adjacent to each other on the finished sign. Non-conformance may result in non-uniform shading and an undesirable contrast between adjacent widths of applied sheeting which will not be acceptable. The method of attachment of the extruded aluminum panels to an overhead sign bracket assembly or a ground mounted assembly shall be as follows:
utilized in the bracket assembly.
0.8 of the cantilever overhand of the sign sheets above and below the sign stringers.
1 inch in length; and may be varied in increments of ½-inch length to develop proper strength.
Τ−35
Plans.
or more threaded aluminum studs welded to the aluminum sign sheets, and studs shall be provided with aluminum nuts to engage the locking tab as shown on the Plans.
shall be done by means of aluminum studs. T.16.03.4 Locations. The requirements of Subsection T.15.03.4 shall apply. T.16.03.5 Shop Drawings. The Contractor will be required to furnish drawings showing arrangements and spacing of texts and indicating colors of texts and reflective sheeting. Signs found not to conform strictly with the "Manual on Uniform Traffic Control Devices" shall be brought into conformance with said manual prior to acceptance at no additional cost to the State. The shop drawings will show cross sections of the highway in the areas involved, and the dimension, type and positioning of the signs to be mounted. Within 30 days after award of the Contract, and prior to fabrication, the Contractor shall furnish, in duplicate, for the approval of the Engineer, complete shop drawings or manufacturer's standard specifications and drawings showing the material and design of t he structure proposed to be erected, including details of bases and method of attaching signs to the structure. After investigating the site conditions, the Contractor shall develop shop drawings in accordance with Subsection 105.02; Plans and Shop Drawings , of these Specifications. Shop drawings shall be developed for the foundations and structural supports based on details indicated on the Plans. T.16.03.6 Sign Covering. The Contractor is to cover and keep covered all signs which have been erected until the message on the signs is pertinent to traffic operations at the time. The covering shall be No. 10 duck mildew-proof canvas. No. 2 spur grommets shall be provided on the periphery of the canvas, 9 inches from center to center of grommets, to receive manila rope, having a diameter of 1/4-inch to 5/16-inch, for fitting and a ttaching the canvas to t he sign panel. The canvas shall be dull green in color and have sufficient overlap on the back of sign to be cross-lashed with manila rope to prevent excessive movement and ripping by wind. T.16.04 METHOD OF MEASUREMENT. T.16.04.1 Ground Mounted Primary Directional Sign Panels - Extruded Aluminum. "Ground Mounted Primary Directional Sign Panels - Extruded Aluminum" will be measured by the number of square feet actually furnished and installed in accordance with the Plans and/or as directed by the Engineer. T.16.04.2 Ground Mounted Primary Directional Sign Post - Steel Breakaway. "Ground Mounted Primary Directional Sign Post - Steel Br eakaway" will be measured by the number of units actually furnished and installed in accordance with the Plans and/or as directed by the Engineer.
Τ−36 T.16.05 BASIS OF PAYMENT. T.16.05.1 Ground Mounted Primary Directional Sign Panels - Extruded Aluminum. The accepted quantity of "Ground Mounted Primary Dire ctional Sign Panels - Extruded Aluminum" will be paid for at the contract unit price per square foot as listed in the Proposal. The price so-stated shall constitute full and complete compensation for all labor, tools, materials and equipment, including application of reflective sheeting, exit sign panels, legends, borders, arrows, shields, hardware, sign coverings, and all incidentals required to finish the work, complete in place and accepted by the Engineer. T.16.05.2 Ground Mounted Primary Directional Sign Post - Steel Breakaway. The accepted quantities of "Ground Mounted Primary Directional Sign Post - Steel Breakaway" will be paid for at the contract unit price per each as listed in the Proposal. The price so-stated constitutes full and complete compensation for all labor, tools, materials and equipment, including foundations, breakaway couplings, the restoration of existing ground surfaces and all incidentals required to finish the work, complete in place and accepted by the Engineer. SECTION T.17
OVERHEAD SIGN PANELS AND SUPPORTS T.17.01 DESCRIPTION. This work consists of furnishing, fabricating, transporting, and erecting overhead signs and structures of the type and at the locations indicated on the Plans and/or as directed by the Engineer, all in accordance with these Specifications. The sign structure design shall be furnished by the Contractor with construction contingent upon approval of the Engineer. This work also includes steel overhead sign structures, including concrete bases for supporting columns, extruded aluminum overhead sign panels, and all necessary hardware and attachments required. T.17.02 MATERIALS. Extruded aluminum sign panels, structural sign supporting members and shapes, reflective sheeting, text, borders, colors, and hardware shall conform to the applicable requirements of SECTION M.16; SIGNS AND SIGN SUPPORTS , of these Specifications. Concrete for bases shall be Class A(AE) and shall conform to the applicable requirements of SECTION 601; PORTLAND CEMENT CONCRETE , of these Specifications. T.17.03 CONSTRUCTION METHODS. T.17.03.1 Sign Design. Each complete sign, which includes sign structure, sign panel, and sign panel supporting frame, shall be designed, fabricated and erected to withstand wind loadings and design stress values as set forth in the latest revision of AASHTO "Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals." T.17.03.2 Steel Overhead Sign Structure. Prior to the start of fabrication of the overhead sign supports, the Contractor shall, in the field, verify the location of the foundations and establish and verify all elevations, dimensions and longitudinal grades.
Τ−37All connections using high strength bolts shall conform to the applicable requirements of SECTION 824; STRUCTURAL STEEL CONSTRUCTION , of these Specifications.
Prior to assembly, the top and bottom surfaces of the base plate shall be planed, or else the plate shall be hot straightened. The post shall be faced at the bottom end. The top leveling nuts and the grout leveling template shall be removed prior to placing the base plate and post assembly upon the foundation. The Overhead Truss Sign Support shall not be painted except that any damaged galvanized areas shall be given two coats of zinc paint conforming to the requirements of the Federal Specification TT-P-641-b (2). T.17.03.3 Sign Panel. Signs shall be fabricated of extruded aluminum sign panels in accordance with the requirements of Subsection T.16.03.3 of these Specifications. T.17.03.4 Shop Drawings. The requirements of Subsection T.16.03.5 shall apply. T.17.04 METHOD OF MEASUREMENT. T.17.04.1 Overhead Sign Panels. "Overhead Sign Panels" will be measured by the number of square feet of panels actually furnished and installed in accordance with the Plans and/or as directed by the Engineer. T.17.04.2 Overhead Sign Structures. "Overhead Sign Structures" will be measured by the number of such units actually furnished and installed in accordance with the Plans and/or as directed by the Engineer. T.17.05 BASIS OF PAYMENT. T.17.05.1 Overhead Sign Panels. The accepted quantity of "Overhead Sign Panels" will be paid for at the contract unit price per square foot, as listed in the Proposal. The price so-stated shall constitute full and complete compensation for all labor, tools, materials and equipment, including reflective sheeting, legend, borders, arrows, exit sign panels, shields, har dware, and all incidentals required to finish the work, complete in place and accepted by the Engineer. T.17.05.2 Overhead Sign Structures. The accepted quantity of "Overhead Sign Structures" will be paid for at the contract unit price each as listed in the Proposal. The price so-stated shall constitute full and complete compensation for all labor, tools, materials and equipment, including foundations, hardware, and all incidentals required to finish the work, complete in place and accepted by the Engineer. Allowance for rock excavation shall be made for a distance of one foot outside the foundation and 6 inches below the bottom of the foundation, as constructed, and will be measured and paid for as "Trench Excavation - Rock" under the applicable requirements of SECTION 205; TRENCH EXCAVATION , of these Specifications.