606Metal Barrier, Cable Barrier and Concrete Wall Barrier

606.1 Description

This Work consists of constructing guardrail, permanent concret e wall barrier (CWB), temporary concrete wall barrier (TCWB), end treatments, transit ions, and protection systems.

606.2 Materials

606.2.1 Guardrail

The types of guardrail are as follows: 1. Single face W-beam guardrail; 2. Double faced W-beam guardrail; 3. Single face Thrie beam guardrail; and 4. Double faced Thrie beam guardrail. Each guardrail type shall have galvanized rail elements unless otherwise specified in the Contract. The Contractor shall use Materials for guardrail installations in accordance with the current edition of the AASHTO Task Force 13 Guide to Standardized Highway Barrier Hardware .

606.2.1 1 Rail Elements

606.2.1 1.1 Galvanized Guardrail

The Contractor shall provide guardrail elements with a corrugat ed beam in accordance with AASHTO M 180, Type 2, Class A. The Contractor shall galvanize steel rail elements before or af ter fabrication in accordance with AASHTO M 180 if necessary. The Contractor shall provide required hardware and fittings in accordance with AASHTO M 30 for the specified diameter and strength class.

606.2.1 1.2 Weathering Guardrail

The Contractor shall provide corrosion-resistant "weathering" g uardrail Materials if specified in the Contract. Weathering guardrail Materials shal l consist of A 606 Type 4 steel, be in accordance with AASHTO M 180, Class A, Type 4 stan dards, and shall ensure they have a corrosion resistance at least four (4) times that o f plain carbon steel.

606.2.1 1.3 Double Nested Guardrail

The Contractor shall provide a second rail element attached to each face as specified in the Contract. The second rail element shall have the same g alvanization or "weathering" properties as that of the exterior rail element.

606.2.1 2 Fasteners

Unless otherwise specified, the Contractor shall galvanize fast eners in accordance with AASHTO M 111 or ASTM A 153. The Contractor shall galvaniz e after fabrication. Section 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier Page 638 The Contractor shall provide bolts in accordance with ASTM A 30 7 and nuts in accordance with ASTM A 563, Gr ade A or better. The Contractor shall provide fasteners for weathering guardrail in accordance with AASHTO M 180 for Type 4 steel.

606.2.1 3 Posts

606.2.1 3.1 Reserved

606.2.1 3.2 Structural Shape Posts

The Contractor shall provide structural shape posts in accordan ce with ASTM A 36 and galvanize them in accordance with ASTM A 123. The Contract or shall not perform punching, drilling, or cutting after galvanizing. The Contract or shall provide posts for guardrail in accordance with NCHRP Report 350 Recommended Procedures for the Safety Performance Evaluation of Highway Features and the AASHTO Manual for Assess ing Safety Hardware (MASH).

606.2.1 4 Offset Blocks

606.2.1 4.1 Wood Offset Blocks

The Contractor shall provide wood offset blocks as specified fo r the guardrail and end treatment type. Wood offset b locks shall be S outhern Yello w Pine, Western Larch, Ponderosa Pine, Douglas Fir, or Lodgepole Pine and either rough sawn (unplaned) or S4S with nominal dimensions specified and with a stress grade of at least 1,200 psi. The size tolerance of rough-sa wn blocks in the direction of the bolt holes will be within ± 1/4 inch of specified dimensions. The Contractor shal l only use one (1) combination of post and block for any one (1) conti nuous length of barrier. The Contractor shall provide wood preservatives and treatment i n accordance with AASHTO M 133 or AWPA Standard U1, Commodity Standard B: Posts.

606.2.1 4.2 Plastic and Composite Offset Blocks

The Contractor shall provide pla stic or composite offset blocks as specified for the guardrail and end treatment type and in accor dance with the guardrail manufacture’s recommendations. The Contractor shall ensure Suppliers of plastic or composite b locks proposed for inclusion on the Department’s Approved Pr oducts List submit certification to the Project Manager for approval by the State Traffic Engineer.

606.2.2 Cable Barrier

606.2.2 1 General Requirements

TL4 is required when installed on slopes 6:1 or flatter. Syst ems shall meet TL-3 when installed on slopes between 4:1, and 6:1. End anchors shall me et TL-3. High tension post and cable barrier shall not be installed on slopes exceeding 4: 1. The system shall utilize four

606.2.2 3 Cost Breakdown

The Contractor shall submit a cost breakdown summary of all co mponents/Materials (i.e. part numbers) required for each completed permanent installatio n. The Contractor shall provide this cost breakdown summary to th e Project Manager at least three (3) weeks prior to the Pre-Construction Conference. A minimum of five (5) copies shall be provided to the Project Manager. The Contractor shall not be allowed to initiate any Work on th e Project until a cost breakdown summary has been prov ided, and is approved by the Pro ject Manager.

606.2.2 4 Materials

The Contractor shall provide Ma terials for post and cable barr ier certified to meet the testing requirements in accordance with NCHRP Report 350 or as indicated on the Plans. The Contractor shall use Materials of the manufacturer’s latest approved design. The Contractor shall use Materials of a uniform type, and from a si ngle manufacturer. The Contractor shall not mix component parts. The cable shall be ¾ inch, three (3) x seven (7), pre-stretche d galvanized wire rope meeting the requirements of AASHTO Designation M 30/ ASTM Desig nation A 741, Type 1, Class A coating, having a Modi fied Breaking Strength equal to 3 9,000 pounds. The cables shall be pre-stretched to a minimum wire rope modulus of elasti city of 19,000,000 psi in accordance with ISO 12076-202 Wire Rope Modulus of Elasticity “ Initial” (as manufactured), with no bedding (or pre-stretching) of the rope permitted in te sting . Samples for proof-testing will be required to assure that wire ropes and connections meet or exceed the minimum breaking load for the rope. The wire rope shall be pre-stretch ed during manufacturing to exhibit a minimum modulus of el asticity of 11,805,090 pounds/in ² after pre-stretching. Each cable shall be individually anchored. Only swaged fittings shall be pr ovided. Field-installed, galv anized-steel fittings (i.e., turnbuckles and splices) shall be one (1) inch diameter. Facto ry applied or stainless steel fittings shall be per the manufactu rer's Specifications. Fully fitted ropes shall develop a Minimum Breaking Load (MBL) of 36,800 pounds. Only threaded ends, swaged onto the cables shall be used for connecti ng the cables to the turnbuckl es. However, a maximum of Section 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier Page 640 two (2) field-installed connectors per wire rope per run may be used if needed for run length adjustment. These connectors, if used, shall utilize a threade d-end socket to secure the wedge by compression. Posts shall be installed in so cketed drivable or concrete foun dations utilizing a metal sleeve for insertion of the post. The vertical plumbness of th e posts shall be within one- quarter inch (1/4”). Low-density polyethylene post caps shall be placed on top of each post. Posts, end anchor components, metal socket sleeves, and inciden tals shall be galvanized to ASTM A-123 after fabrication. Retro-reflective sheeting providing at least ten (10) in² of r eflective area shall be attached to both sides of the last five (5) posts at each end of the end terminal, then throughout the remainder of the installation at a maximum spacing of 30 feet. The spacing shall be adjusted to 15 feet on curves having a radius less than 3500 feet. The sheeting shall be yellow the same color as the adjacent edge line. The Contractor shall att ach sheeting near the top of the post in a manner recommended by the manufacturer and to the sid e of the post from which vehicle impacts are most likely. For installations where impac ts are likely to occur from either side, the Contractor shall apply the sheeting to both sides of the post. Each post shall have a low-density polyethylene excluder gaske t, profiled to fit tightly around each post, placed so to prev ent debris from entering the socket, and at least one (1) reinforcing ring, together with other reinforcement as recommen ded by the manufacturer.

606.2.2 5 Concrete and Steel Reinforcement

The Contractor shall provide concrete and steel reinforcement in accordance with manufacturer’s recommendations and in accordance with Section 5 10, “Portland Cement Concrete” and Section 540, “Steel Reinforcement”.

606.2.2 6 Construction Requirements

The Contractor shall fabricate, assemble, and install post and cable barrier in accordance with these Specifications, m anufacturer's recommendations, and the approved shop drawings submittal. The Contractor shall perform all geotechnical investigations, which include all reports, and soil boring logs necessary f or completing the post and cabl e barrier design. No additional payment will be made to the Contractor for geotechnical investi gations or any other analysis required subsequent to the seal ed shop drawing submittal. Each post foundation shall be c onstructed to the size and shap e recommended by manufacturer based on soil and ground conditions, but minimum s ize shall be 12” diameter by 36” deep (12” x 36”). Excavated Materials shall not fall back into the hole. End anchor foundations shall be designed based on soil conditi ons to meet the manufacturer’s Specification. E xcavations shall be in natural, undisturbed ground; if over- excavation is unavoidable, the sides shall be vertical and addi tional concrete used to completely fill the excavated area. Alternatively, foundations may be formed and cast, then backfilled to a minimum 95% compacted density. At locations where the propos ed post and cable barrier does no t interfere with the functioning of the existing guardrail, the Contractor shall not remove the existing guardrail until the post and cable barrier system is fully functional. Once th e installation is fully functional, the Contractor shall remove existing guardrail within five (5) Working Days. Section 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier Page 641 606.2.2.7 Tensioning Tensioning of the cables shall be in accordance with the manuf acturer's instructions and Specifications. Tension charts shall have a minimum range of - 20º F to 180º F. Cable tension shall be deemed Acceptable when the following th ree (3) conditions are met: 1. The entire system is initially tensioned to full compliance in accordance with the manufacturer’s Specifications; 2. A minimum of 21 Days after the initial tensioning, a second tensioning shall be done with successive tension measurements at every turnbuckle on eac h cable being adjusted to the manufacture r’s Specifications; and 3. The manufacturer certifies that the full cable system has be en tensioned in accordance with their Specifications and complies with the manu facturer's tension requirements. The manufacturer shall provide a recommended tension chart for their system. The chart shall be indexed using cable temperature, in degrees Fahrenheit , as the independent variable and tension, in pounds (force), as the dependent variable. Ten sion measurements shall be taken in the vicinity of every turnbuckle on each cable within a segment as directed by the manufacturer. The Contractor shall maintain a tension log showing Project na me, time and date, weather conditions, segment termini, cable temperature, tension measurement location, stationing, mile marker, and actual tension reading. The perso n(s) performing the testing shall sign the tension log daily. The log, along with the manufactur er's recommended tension chart, shall be provided to the Projec t Manager prior to the cable bar rier Subcontractor leaving the Project. The Contractor shall obtain on-site assistance from the manufa cturer during installation, unless the Contractor can prove previous experience with the in stallation of the post and cable barrier system. The Contractor shall ensure a manufacturer’s r epresentative is present for Final Acceptance of the post and c able barrier installation.

606.2.3 Concrete Wall Barrier (CWB) and Temporary Concrete Wall Barrier (TCWB)

The types of CWB are as follows: 1. Slip-formed CWB; 2. Cast-in-place CWB; and 3. Precast CWB. CWB shall be installed by slip-f orming or cast-in-place. TCWB shall be precast. The Contractor shall use Class A concrete in accordance with Se ction 509, “Portland Cement Concrete Mix Designs.” The Contractor shall provide rei nforcing steel in accordance with Section 540, “Steel Reinforcement.” The Contra ctor shall provide preformed asphalt joint filler in accordance with AASHTO M 213. The Contractor shall provide penetrating water r epellent in accordance with Section 532, “Penetrating Water Rep ellent Treatment.” A 3/8” diameter, ASTM A416 Grade 270, AASHTO M 203M, uncoated s even (7)-wire steel strands may be substituted for the AASHTO M31, Grade 60 deforme d bars provided that the steel strands are uncoated, clean and fr ee from dirt, loose rust, oil , grease or other Deleterious Material, for Slip-formed CWB. Section 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier Page 642

606.2.3 1 CWB Steel Access Panel

The Contractor shall provide and install CWB steel access panel s in accordance with the Plans or as directed by the Project Manager. The Contractor shall contour the steel access panel to the shap e of and flush with the CWB. The Department will not allow the steel access panel to c ompromise the structural integrity and performance of the CWB assembly. The Contractor shall provide steel in accordance with AASHTO M 270, Grade 36. The Contractor shall c oat the steel access panel in accordance with Section 545, “Protective Coating of Mi scellaneous Structural Steel.”

606.2.4 End Treatments

The types of end treatments are as follows: 1. End Treatment – W-beam TL-3 end terminal (for all speeds); 2. End Treatment – W-beam TL-2 end terminal (for speeds of 40 m ph or less); 3. End Treatment – W-beam end anchor; 4. End Treatment – Thrie beam end anchor; and 5. End Treatment – W-beam driveway end anchor (for curved guard rail for minor approaches and driveways). The Contractor shall provide End Treatments on the Department's Approved Products List which are required to meet NCHRP Report 350 or the AASHTO Manua l for Assessing Safety Hardware (MASH). W-beam TL-3 End Terminals may be used for all posted speeds. W-beam TL-2 End Terminals may be used for posted speeds of 40 m ph or less. W-beam End Anchors shall be used on the downstream end of W-bea m guardrail runs w hen a crash-worthy TL-3 or TL- 2 terminal is not required. Thrie beam End Anchors shall be used on the downstream end of t hrie beam guardrail runs when a crash-worthy TL-3 or TL-2 end terminal is not required. Driveway End Anchors maybe used on curved W-beam guardrail installations at minor Roadway intersections such as driveways and low speed Roadway a pproaches to the mainline.

606.2.5 Transitions

Transition types may include the following or others as specifi ed in the Contract: 1. Transition from W-Beam to thrie beam; 2. Transition from guardrail to rigid barrier; or 3. Transition from existing guardrail to 31" guardrail.

606.2.6 Protection Systems

Protection Systems may include the following or others as speci fied in the Contract: 1. Median Protection System; or Section 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier Page 643 2. Drainage Structure Protection System. Each system is comprised of W-beam, thrie beam, and expansion/r educer sections working in conjunction to provide increased protection for Bridge piers, f ixed objects and drainage Structures. The minimum lengths required for each component of the system, as well as the required post spacing, shall be as indicated in the Contract.

606.2.7 Materials Certification

The Contractor shall provide MTRs and Certificates of Complianc e in accordance with Section 106.4 “Certificates of Compliance” to t he Project Manager, certifying that the Materials and fabrication are in accordance with these Specifications. Fabrication shall be done by an identifiable source. 606.2.8 Member Identification and Marking The Contractor shall ensure the manufacturer permanently stamps the specific type of guardrail end treatment at each location to corres pond with those shown on the shop drawings provided to the Project Manager, so that each is readi ly identifiable in the field.

606.2.9 Reflective Barrier Delineators

The Contractor shall provide amber-colored reflective barrier d elineators for median barriers and white reflectors for shoulder-side barriers in acc ordance with the Contract and Section 703, “Traffic Markers.” The Contractor shall place reflec tive barrier delineators back to back on median barriers.

606.3 Construction Requirements

During construction, the Contractor shall prevent exposed Steel or concrete barrier ends from creating a hazard to the traveling public.

606.3.1 Guardrail Installation

Installation of guardrail shall be done by personnel certified by the manufacturer. The Contractor shall provide certifications to the Project Manager prior to commencing Work. The Contractor shall position steel parts stored in transit, in open cars or trucks, or outside in yards or at job sites to allow free drainage and air circulation. The Contractor shall handle fabricated steel parts to avoid gouges, scratches, and dents. The Contractor shall keep the steel clean of Deleterious Materi al. If the Contract specifies a weathering guardrail, the Department will not consi der natural oxidation (mill scale) to be Deleterious Material and will not allow galvanizin g, blast cleaning, or pickling of weathering guardrail to remove the mill scale. The Contractor shall draw bolts tight (except adjustment bolts) . The Contractor shall use bolts that are long enough to extend beyond the nuts.

606.3.1 1 Steel Posts

The Contractor shall set posts plumb, in hand-dug or mechanical ly made holes, or by driving. If upward vertical adjustment of posts is necessar y, the Contractor shall remove and reinstall the post. Section 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier Page 644

606.3.1 1.1 Steel Posts in Asphalt

The Contractor shall construct a leave out for all W-beam locat ions in asphalt. The Contractor shall perform post drilling or driving operation s that does not cause bulging, distressing, or other disturbance of the asphalt surfa ce. If bulging or other distress of the asphalt surfacing occurs wh en drilling or driving steel posts, the Contractor shall remove and reinstall these posts us ing guide holes drilled through the asphalt surfacing. The Contractor shall make the g uide holes with a minimum eight (8) inch diameter. If after precutting or drilling the guide holes, bulging or oth er distress of the asphalt surfacing occurs or if posts c annot be driven to the specified depths, the Contractor shall cease the driving, remove the posts, and extend the guide holes as necessary or as directed by the Project Manager. The Contractor shall backfill and compact postholes with Accept able Department approved Material, such as Base Course or cold mix, placed in t hin layers, to within three

606.3.1 1.2 Steel Posts in Concrete

The Contractor shall construct a leave-out for all W-beam and t hrie-beam locations in concrete. The Contractor shall backfill and compact postholes with Accept able Material, such as Base Course or cold mix, placed in thin layers, to within th ree (3) inches of the surface grade. The Contractor shall place three (3) inches of Base Cou rse in accordance with Section 303, “Base Course.” The Contractor shall manually tamp and neatly level to surface grade. The Contractor shall apply an emulsion to the l eave out area within 24 hours of compaction as approved by the Project Manager.

606.3.1 1.3 Steel Posts in Rock

When W-beam posts are restrained by asphalt or concrete surfaci ng, a leaveout shall be constructed. The Contractor shall perform post drilling operations that does not cause bulging, distressing, or other disturbance of the asphalt surface. If bulging or other distress of the asphalt surfacing occurs wh en driving steel posts, the Contractor shall remove and reinstall these posts using guide h oles drilled through the asphalt surfacing. The Contractor shall make the guide holes w ith a minimum eight (8) inch diameter. If after precutting or drilling t he guide holes, if bulging or other distress of the asphalt surfacing occurs or if posts cannot be driven to the sp ecified depths, the Section 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier Page 645 Contractor shall cease the driving, remove the posts, and exten d the guide holes as necessary or as directed by the Project Manager. The Contractor shall backfill and compact postholes with Accept able Material, such as Base Course or cold mix, placed in thin layers, to within th ree (3) inches of the surface grade. The Contractor shall place three (3) inches of Base Cou rse in accordance with Section 303, “Base Course.” The Contractor shall manually tamp and neatly level to surface grade. The Contractor shall apply an emulsion to the l eave out area within 24 hours of compaction as approved by the Project Manager.

606.3.1 2 Thrie Beams and W-Beams

The Contractor shall erect smooth and continuous rail elements. The Contractor shall overlap rails in the same direction as the traffic flow o f the nearest lane. The Department will only a llow such drilling or cutting that is nec essary for special connections and for sampling in the field. The Contractor shall shop-fabric ate curved rails having a radiu s of 150 ft. or less to the appropriate curvature specified in the Plans.

606.3.1 3 Repair of Damaged Coating

If the galvanizing of guardrail or appurtenances is damaged, th e Contractor shall repair the coating by galvanizing or by coating with two (2) co ats of zinc dust-zinc oxide paint in accordance with Federal Specification TT-P-641 or Mili tary Specification ML-P-21035.

606.3.2 R eserved

606.3.3 Concrete Wall Barrier and Temporary Concrete Wall Barri er Installation

606.3.3 1 Concrete Wall Barrier and Temporary Concrete Wall Bar rier Fabrication

The Contractor shall fabricate CWB in accordance with Section 5 10, “Portland Cement Concrete,” and Section 511, “Concrete Structures.” The Contractor shall construct TCWB in accordance with the Plan s. The Contractor shall construct CWB in accordance with the Plans . The Contractor shall ensure that the top of the completed barrier does not deviate f rom the Plans more than ± 0.19 inches. The Contractor shall place reinforcement in accordance with Section 540, “Steel Reinforcement.” The Contractor shall give the CWB a Class 2, R ubbed Surface Finish, or Class 4, Special Surface Finish, in accordance with Section 511 .3.8, “Finishing.” The reinforcement shall be placed as shown on the approved draw ings. When substituting steel strands caution must be taken to prevent and avoid displacement from detailed orientation. If the manufacturer requires sandblasting, the Contractor shall not displace mortar used in the surface finish from the bubble pockets, pits, depre ssions, and honeycombs. The Contractor shall cure CWB in accordance with Section 511.3. 9, “Curing.” The Contractor shall treat the entire exposed surfaces of CWB w ith penetrating water- repellent treatment in accordance with Section 532, “Penetratin g Water Repellent Treatment.” Section 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier Page 646 When called for in the Contract, the Contractor shall apply pen etrating water repellent first, then the Special Surface Finish. The Department will not require fly ash in the PCC used to fabr icate TCWB.

606.3.3 2 Permanent Concrete Wall Barrier Joint Treatment

When sawing transverse weakened-plane joints, the Contractor sh all perform the sawing after the concrete has hardened enough to prevent raveli ng, crumbling, or shape deformation. The Contractor shall saw control joints at interv als designated in the Plans or as directed by the Project Manager. After completing the sawing o perations, the Contractor shall clean the sawed area of debris. The Contractor shall make a construction joint after the day’s permanent placement operations and at locations w hen concrete placement is interrupted for 30 minutes or more.

606.3.3 3 Permanent Concrete Wall Barrier Installation

The Contractor shall construct footings and foundations, and pr epare the Subgrade to 95% of maximum density in accordance with AASHTO T 180 (Modi fied Proctor), Method D (TTCP Modified) as necessary, before placing the CWB. The Contractor shall construct vertically offset (atypical) CWB as specified in the Plans.

606.3.3 3.1 Temporary Concrete Wall Barrier Requirements

The Contractor shall precast TCWB as specified in the Plans. T he Contractor shall not intermix CWB of different d esigns, shapes, or lengths. The Contractor shall set TCWB in accordance with the Contract and the approved traffic control P lan. The Contractor shall provide necessary loading, hau ling, and unloading at designated sites. The Contractor shall reset the TCWB during construction, as req uired by the Contract. After completing the project, the Contractor shall remove, load , haul, unload, and stockpile the Department retained or D epartment provided CWB at the locations required in the Contract or as directed by the Project Manager.

606.3.3 3.2 Temporary Concrete Wall Barrier (Retained by the Co ntractor)

If the Contract specifies TCWB retained by the Contractor, the Contractor shall provide new or used TCWB. TCWB retained by the Contractor w ill remain the property of the Contractor upon completion of the Project. The Contractor shall provide connecting hardware for the TCWB a ssembly.

606.3.3 3.3 Temporary Concrete Wall Barrier (Retained by the De partment)

If the Contract specifies TCWB retained by the Department, the Contractor shall provide new TCWB. TCWB retained by the Department, including shop drawings and co nnecting hardware, as approved by the Project Manager, will become the p roperty of the Department upon completion of the Project. Section 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier Page 647 The Contractor shall remove, dispose and replace Department ret ained TCWB that is not Accepted by the Project Manager.

606.3.3 3.4 Department-Furnished Temporary Concrete Wall Barrie r

If the Contract specifies Department-furnished TCWB, the Contra ctor shall load, haul, and unload Department-furnished TCWB from origins to dest inations. Department-furnished TCWB will remain the property of the Depar tment upon completion of the Project. If the Contract specifies Department-furnished TCWB, the Contra ctor shall provide connecting hardware for the TCWB assembly, if missing from the TCWB units.

606.3.4 End Terminal or End Anchorage Installation (End Treatme nt Systems)

The Contractor shall install end treatment systems in accordanc e with the manufacturer’s recommendations and approved shop drawings. Ins tallations shall be performed by certified personnel.

606.3.5 Transition Installation

The Contractor shall install transitions in accordance with the Contract and approved shop drawings.

606.3.6 Protection System Installation

The Contractor shall install Protection Systems in accordance w ith the Contract and approved drawings. Assembly and installation of each component of the Protection S ystem shall be supervised at all times by the Contractor's representative cert ified by the manufacturer.

606.3.7 Embankment Grading Requirements

The Contractor shall compact Embankment Material to 95% of maxi mum density in accordance with AASHTO T 180 (Modified Proctor), Method D (TTCP Modified). Unless otherwise specified in the Contract, the ground surface between the edge of the should er and the hinge point of the slope behind the guardrail shall be graded at 10:1 (H:V) or flatter. The Contractor shall warp all grade transitions to create smooth surface contours.

606.3.8 Drainage Requirements

The Contractor shall provide guardrail drainage components as s pecified in the Contract. Unless otherwise specified, a min imum thickness of 1 ½ inches o f hot/warm mix asphalt shall be placed and compacted beneath the guardrail area. Asphalt curb or concrete curb may be used to direct surface run off as specified in the Contract. Metal curbs are not allowed. For Transitions from guardrail to rigid barrier, the Contractor shall not extend the asphalt curb or concrete curb beyond the thrie b eam to W-beam reducer element. If additional curb length is needed, then the Contrac tor shall extend the curb through the entire Transition and add 12.5 ft. of nested W-beam adjacent to and upstream of the thrie beam to W-beam reducer element. All asphalt curb or concrete c urb shall be placed below the guardrail offset block with the face of the curb aligned with t he face of the guardrail. Section 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier Page 648

606.3.9 Vegetation Management Requirements

The Contractor shall provide vegetation management as specified in the Contract. Vegetation management may consist of asphalt paving, concrete paving, or a pplication of an approved herbicide.

606.4 Method of Measurement

606.4.1 Guardrail Measurement

Guardrail will be measured and paid in linear feet of guardrail that has been s a t i s f a c t o r i l y c o m p l e t e d a n d A c c e p t e d , e x c l u s i v e o f t h a t l e n g t h of guardrail that is within the pay limits of e n d treatments, transitions and linear feet o f protection system as specified. Measurement will be m ade along the centerline of the barrier. Weathering Guardrail will be measured and paid in linear feet of guardrail that has b e e n s a t i s f a c t o r i l y c o m p l e t e d a n d A c c e p t e d , e x c l u s i v e o f t h a t l ength of guardrail that is w i t h i n t h e p a y l i m i t s o f end treatments and transitions, transitions and linear feet of protection system. Measurement will be m ade along the centerline of the barrier. Curved Guardrail will be measured and paid as linear feet of standard Guardrail or thrie beam.

606.4.2 Cable Barrier Measurement

The Department will measure the post and cable barrier install ation along the face of the barrier from end to end for each section. End anchors will be paid by the each.

606.4.3 Concrete Wall Barrier Measurement

CWB and TCWB w ill be measured along the centerline of the barrier. CWB flare within CWB Transition Section will be measured as CWB.

606.4.4 End Terminal or End Anchor (End Treatment System) Measu rement

End Treatment Systems will be measured and paid in units of eac h completed and Accepted, inclusive of integral transiti on sections connecting the End Tr eatment to the corresponding guardrail or concrete wall barrier. Each End Treatment is incl usive of all necessary posts, blocks, connections, anchorage, fasteners, grading, drainage el ements, vegetation management components and leave-outs.

606.4.5 Transition Measurement

Transitions will be paid by each for transitions that have been satisfactorily completed and Accepted. Measurement will be made along the transition ce nterline and exclusive of that length of barrier that is within the pay limits of end tre atments or the corresponding guardrail or concrete wall barrier. Transitions that are integ ral to the end treatment system shall be considered to be part of the end treatment system and shall not be measured or paid separately. Each Transition is i nclusive of all necessary anch orage fasteners, grading, drainage elements, and vegetation management components.

606.4.6 Protection System Measurement

Protection Systems will be measured and paid in units of linear feet of t h e protec tion system that has been satisfactorily completed and Accepted. Me asurement will be made Section 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier Page 649 along the protection system cent erline and exclusive of that le ngth of barrier that is within the pay limits of end treatments. Each Protection System is inclus ive of all necessary anchorage, fasteners, grading, drainage elements, vegetation ma nagement components and leave-outs.

606.4.7 Removal and Reinstall Guardrail

Remove and Reinstall Guardrail will be measured and paid in lin ear feet of guardrail that has been satisfactorily removed, replaced, and Accepted exclusive o f end treatments and transitions. Measurement will be made along the railing face center to cente r of the outermost post in the length of guardrail being measured.

606.5 BASIS OF PAYMENT Pay Item Pay Unit

Guardrail Linear Foot Weathering Guardrail Linear Foot End Terminals Each End Anchors Each Transitions Each Protection Systems Linear Foot Remove and Reinstall Guardrail Linear Foot Post and Cable Barrier Linear Foot Post and Cable Barrier End Anchor Each Concrete Wall Barrier Linear Foot TCWB Retained by the Department (___ ft) Linear Foot Resetting of TCWB (___ ft) Linear Foot Department-Furnished TCWB (___ ft) Linear Foot TCWB Retained by the Contractor (___ ft) Linear Foot Concrete Wall Barrier (Modified) Linear Foot Concrete Wall Barrier (Half Section) Linear Foot

606.5.1 Work Included in Payment

The following Work and items will be considered as included in the payment for the main item(s) and will not be measured or paid for separately: 1. All loading, hauling, unloading, stockpiling, or disposal; 2. Moving or removal of temporary barrier; 3. Footings and foundations; 4. Offset Blocks; 5. Reflective sheeting and reflectors installed on guardrail, e nd treatments, and transitions; 6. End treatment posts, sleeves , anchors, barrier rail and impa ct head; 7. Backfilling and compacting of holes created by removal and i nstallation of posts; 8. Embankment Material, placement, and grading; 9. Placement and compaction of asphalt Material; 10. Construction of surfacing; Section 606: Metal Barrier, Cable Barrier and Concrete Wall Barrier Page 650 11. Construction of post leaveouts; 12. Construction of asphalt curbs; 13. Patching Material at posts; 14. All connecting hardware; 15. Manufacturers’ certificates, literature, and shop drawings (Professional Engineer submittal); 16. When required; Assistance from the manufacturer during inst allation and manufacturer’s representative presence for Pre-Construction meeting; 17. Manufacturer’s representative presence for Final Acceptance ; 18. End Anchorage treatments; all connecting hardware; wire rop e; 19. Design of post foundations per manufacturers recommendation s; 20. Concrete, reinforcing steel, excavation, backfill, and any Work or Materials required for post foundation construction per ma nufacturers recommendations; 21. Patching Material to existing Hot Mix Asphalt, Base Course and Open- Graded Friction Course; 22. Installing all posts w ith caps; reflectors; 23. All labor; Equipment; tools; 24. Replacement of damaged posts during construction; 25. All Quality Control (QC), inc ludes all sampling and testing by the Contractor; 26. All geotechnical investigations (reports and soil boring lo gs); 27. Modifications to the cable ba rrier system subsequent to the shop drawing submittal; 28. Reflective barrier delineators installed on CWB and TCWB; 29. Curing of CWB and application of penetrating water-repellen t treatment; 30. Connection pins and anchors for TCWB; 31. Concrete wall barrier access panel; 32. Reinforcing Steel; 33. Transitions that are integral to end treatment systems; 34. Replacement of unacceptable Department retained TCWB due to Contractor mishandling; and 35. Guardrail post installation in rock. Section 607: Fence Page 651