Effective with the December 2018 Letting 350 2019 Standard Spec ifications Section 614 Semi-rigid Barrier Systems and End Treatments
614.1 Description
1.This section describes providi ng steel guardrail systems inclu ding rail, terminal and transition treatments, other roadside energy absorbing safety devices, and earthwork for barri er systems. This section also describes providing and removing temporary guardra il, adjusting existing guardrail, salvaging materials from existing installations.
614.2 Materials
614.2.1 General
1.Furnish materials conforming to the following: Asphaltic s urface ............................................. ............................................................................................ 465.2 Non-bituminous joint sealer ................................... ...................................................................................... 502.2 Structural steel and miscellaneous metals ................................................................................................... 506.2 Steel reinforcement ...................................................................................................................................... 505.2 Wood posts and o ffset blo cks .................................. .................................................................................... 507.2 Emulsified asphalt ........................................................................................................................................ 604.2
2.Furnish grade A, A-FA, A-S, A-T , A-IS, A-IP, or A-IT concrete conforming to 501 as modified in 716, except under the Crash Cushions Temporary bid item the contract or may use SHES concrete as specified for SHES concrete repair and replacement in 416.2 . Provide QMP for class II ancillary concrete as specified in 716. If crash cushion manufacturer det ails specify c oncrete streng th for pads or blocks, provide QMP for class I structure concrete as specif ied in 715. Define class I structure sublots for each crash cushion location, apply the small quanti ty exceptions specified in 715.1.1.2 , base acceptance on individual sublot average strength, and adju st pay under 715.5.3 as specified for lots with less than 4 sublots.
3.Furnish zinc dust/zinc oxide paint conforming to Federal specification TT-P-641.
4.Furnish steel nuts conforming to ASTM A563, washers conforming to ASTM F436, grade 1, and bolts conforming to ASTM A307. Ensure that the nuts, washers, and bolts are either hot-dip c oated according to AASHTO M232 class C or mechanically coated accordi ng to ASTM B695 class 50.
5.Furnish zinc coated wire rope and fitting conforming to the pl ans and galvanized according to ASTM A741.
6.Before installation store galv anized components above ground l evel and away from surface run off. The department may reject materia l if the zinc coating is physically damaged or oxidized.
7.Provide manufacturer's drawing s, and installation and maintena nce instructions when providing proprietary systems.
8.Furnish shop-applied type F reflective sheeting from the depar tment's APL.
9.Furnish object markers conformi ng to the type 3 object marking pattern shown in the WMUTCD. Add 614.2.1(10) to specify off set block-mounted guardrail reflectors from the department's approved products list. This change was implemented in ASP 6 effective with the December 2017 letting.
10.Furnish guardrail reflectors from the department's APL.
614.2.2 Controlled Low-Strength Backfill
1.Provide controlled lo w-strength ba ckfill consisting of a contr actor-designed cementitious mixture of fine aggregate, fly ash, cement, water , and optional admixtures. Ens ure that the resulting mixture hardens with 24 hours to the degree tha t it will support foot traffic a nd conforms to the following: TEST METHOD VALUE Strength ASTM D4832 40-80 psi in 28 days
2.Submit design mix along with s trength test results to the engi neer at least 10 business days before placing material. 614.2.3 Steel Rail and Fittings
1.Furnish galvanized steel rail conforming to AASHTO M180 class A, type II beam using the single-spot test coating requirements. Furnish steel for retrofit assemblies, anchor post assemblies, plates, anchor plates, post mounting brackets, and other structural steel comp onents conforming to 506.2.2.1 and hot-dip galvanized according to ASTM A123.
2.For rail requiring bends with a radius less than 150 feet, ens ure that the required bends are made in the manufacturer's fabrication shop. Effective with the December 2018 Letting 351 2019 Standard Spec ifications (3) Furnish steel tubes for brea kaway posts conforming to ASTM A500, grade B and hot-dip galvanized according to AASHTO M111.
4.Furnish anchor assemblies fabr icated as the bridge parapet det ails show. Over-tap threaded inserts according to ASTM A563 and electro-galvanize the entire assembly according to ASTM B633 after fabrication. Furnish cap screws hot-dip galvanized as the parap et details show.
614.2.4 Energy Absorbing Terminal
1.Furnish energy absorbing termi nals (EAT's) and EAT marker post s from the department's APL. Furnish reflective sheeting panels constructed from sheet alumi num with shop-applied reflective sheeting conforming to the plan details and 637.3.2 .
614.2.5 Posts and Offset Blocks
614.2.5 1 Wood Posts and Offset Blocks
1.Furnish sawed posts and offse t blocks of one of the following species: Douglas fir Southern pine Ponder osa pine Jack pine White pine Red pine Western hemlock We stern larch Hem-fir Oak
2.Ensure that posts are the size the plans show and conform to t he nominal and minimum dimensions tabulated in 507.2.2.3 . The contractor does not have to surface the posts. Provide posts of the net length the plans show after setting and cut off.
3.Use stress graded posts rated at 1200 psi f b or higher. Determine the stress grade rating for douglas fir, western larch, and sou thern pine as specified in 507.2.2.4 .
4.For hem-fir, hemlock, red pine , white pine, jack pine, pondero sa pine, and oak conform to the following: TABLE 614-1 PROPERTIES FOR WOOD POSTS AND BLOCKS SPECIES WESTERN HEMLOCK, HEM-FIR, RED PINE, WHITE PINE, JACK PINE, PONDEROSA PINE OAK MAXIMUM SLOPE OF GRAIN 1 in 15 1 in 12 NOMINAL WIDTH OF FACE 6" 8" 6" 8" SHAKES, CHECKS, AND SPLITS GREEN 1" 1 3/8" 2 3/8" 3 1/8" SEASONED 1 1/2" 2" 2 5/8" 3 1/2" MAXIMUM WANE 1" 1 3/8" 1 1/8" 1 5/8" MAXIMUM ALLOWABLE KNOTS NARROW FACE MIDDLE 1/3 OF LENGTH 1 3/8" 1 5/8" 2 1/8" 2 3/8" END[1] 2 3/4" 3 1/4" 4 1/4" 4 3/4" SUM IN MIDDLE 1/2 OF LENGTH[2] 11" 13" 17" 19 WIDE FACE EDGE KNOT N MIDDLE 1/3 OF LENGTH 1 3/8" 1 5/8" EDGE KNOT AT END[1] 2 3/4" 7 3 1/4" CENTERLINE 1 3/8" 1 7/8" 2 1/4" 2 7/8" SUM IN MIDDLE 1/2 OF LENGTH 5 1/2" 7 1/2" 9" 11 1/2" [1] But do not exceed the maximum allowable knot on the centerline of the wide face o f the same piece. [2] But do not exceed 4 times the ma ximum allowable knot on the ce nterline of the wide face of the same piece.
5.Pressure treat posts and offs et blocks as specified in 507.2.2.6 . Use one of the oil-soluble preservatives or chromated c opper arsenate conforming to 507.2.3 . Use the same material for offset blocks and posts and treat material used in each continuous ins tallation with the same type of preservative. 614.2.5.2 Steel Posts
1.Furnish steel posts conforming to AASHTO M270 Grade 36 and gal vanized according to AASTHO M111. Effective with the December 2018 Letting 352 2019 Standard Spec ifications 614.2.5.3 Plastic Offset Blocks
1.Furnish plastic offset blo cks from the department's APL.
614.2.6 Sand Barrel Arrays
1.Furnish sand barrels from the department's APL. Use sand conforming to 501.3.6.3 mixed with sodium chloride conforming to AASHTO M 143. Apply an object marker to f ront-most barrel in the array.
614.2.7 Crash Cushions
1.Furnish permanent and temporary crash cushions from the department's APL. Use cushions as wide or wider than the plan back-width. Submit details of the object being shielded and orientation of traffic to the crash cushion manufacturer. The crash cushion manufacturer is responsible for providing design details for each installati on that include their crash c ushions as well as connections and transitions to the object being shielded. Ensure that the crash cushion manufacturer's design details are signed and sealed by a professional engineer registered in the state of Wisconsin.
2.Furnish transitions and connections conforming to the crash cu shion manufacturer's design and specifications. Ensure that the transition and connection desig n includes required modifications to the object being shielded. Submit a copy of the manufacturer's crash cushion, connection, and transition design details to the engineer before installation. Modificatio ns to the object being shielded require the engineer's approval before installation.
3.Apply an object marker to the nose of the crash cushion of the color and pattern the WMUTCD shows for work zones or permanent installations.
614.2.8 Adhesive Anchors
1.Furnish adhesive for concrete anchors conforming to ICC-ES AC3 08 and capable of resisting the bond strength the plans show. Provide the adhesive manufacturer’s in stallation instructions to the engineer before installing anchors.
614.3 Construction
614.3.1 General
1.Paint the ends of cut-off galvanized posts, rail, bolts, cut o r drilled surfaces of gal vanized components, and areas of damaged zinc coating with 2 coats of zinc dust/zin c oxide paint. Cl ean and deburr the damaged and adjacent areas thor oughly before applying paint.
2.Apply 2 coats of wood preservati ve to cut surfaces of wood com ponents. Use the same preservative originally used to treat that component or use copper naphthena te solution containing 2 percent or more copper metal conforming to AWPA P34.
3.Anchor barrier systems as the plans show or as manufacturer de tails show. For anc horing to concrete, clean holes and install according to the adhesive manufacturer' s recommendations.
614.3.2 Guardrail
614.3.2 1 Installing Posts
1.Set posts at the required plan lo cations with the front faces in a straight line or, if on a curve, at a uniform distance from the center line. Ensure that they are inst alled plumb, to the required depth, and with adequate lateral stability . The contractor may drive posts or set them in excavated post holes. If rock is encountered, install as the plans show.
2.If the required plan de pth cannot be achiev ed by driving, set posts in excavated holes. Replace posts damaged during driving. Ensure driving does not damage the shou lders and adjacent slopes.
3.If installing posts in excavated post holes, excavate to the p lan depth and compact the bottom of the holes to provide a stable foundation. Set posts to firm bearing and backfill with e ngineer-approved material compacted in layers. Revise 614.3.2.1(4) to clarify that th e contractor must verify the post length and embedment before cutting post tops and to provide for department verification of installed guardrail post depths even after installation.
4.Ensure that posts are at least the minimum length and minimum e mbedment the plan s show before cutting post tops to the finished elevation. After installation , the engineer may direct the contractor to remove and re-install up to 5% o f the posts to verify they were placed to the required plan depth. If a post is embedded less than the r equired plan depth, the enginee r may direct additional sampling. Re- install sampled posts at the lo cations and to the depths the pl ans show. Replace posts and other components that are damaged during sampling. Add 614.3.2.1(5) to specify spacing for offset block-mounted guardrail refl ectors in the plan gene ral notes. This change was implemented in ASP 6 effective with the December 2017 letting.
5.Provide offset block-mounted reflectors as the plans show. Effective with the December 2018 Letting 353 2019 Standard Spec ifications 614.3.2.2 Installing Rail
1.Install rail with lap splices in the direction of traffic. Ens ure that the number and dimensions of holes and bolts conforms to the plan details for new splices. Place the round head of bolts on the traffic side.
2.Cut rails to length by shearing or sawing; do not use cutting torches. Drill bolt holes and punch slots; ensure that they are burr free. After installation, cut anchor bolts that project more than on e inch from the nut to 1/2 inch from the nu t; deburr the threaded end of cu t bolts.
614.3.2 3 Guardrail Terminals and Transitions
1.Attach rail ends to cast in plac e concrete anc horages, energy absorbing terminals (EAT's) or other terminal types, or transition between rail types at structure a pproaches as the contract requires for each guardrail system installation.
2.If concrete anchorages are specified, place concrete without forms filling the entire excavation with concrete to the elevation the plans show. Ensure that steel rei nforcement and the rail are secured at their plan locations before placing concrete. Do not apply forces to the rail element embedded in the concrete anchor until after the concrete develops adequate stre ngth to open it to service under
415.3.15 .
3.If anchoring to structures, atta ch guardrail to the parapets o f structures using anchor assemblies cast into the parapets or drill through the parapet whichever the pl an details show. Plug anchor assemblies not receiving beam guard using cap screws with anti-seize compo und applied to their threads.
4.Install EAT's according to the manufacturer's instructions and as the plans show. Attach reflective panels to the EAT head with stainle ss steel self-tapping screws and install EAT markers as the plans show.
614.3.2 4 Mow Strips
1.Provide mow strips with blockout s for guardrail posts as the plans show. Construct concrete as specified for concrete sidewalk under 602. Construct asphalt as specifie d for asphaltic surface under 465. Backfill post blockouts after po st installation with controll ed low-strengt h backfill.
2.Apply emulsified asphalt to finished aggregate shoulders follo wing the asphalt manufacturer's recommended procedures. Minimize run-off and overspray during a pplication and remove excessive run-off and over spray from adjacent areas immediately after ap plication.
614.3.2 5 Grading, Shaping, and Fi nishing for Barrier Systems
1.Grade, shape, and finish embankm ent slopes for barrier systems at the locations the plans show. Furnish materials and construct as the plans show and engineer directs conforming to the following: Common excavation and material disposal ....................... ............................................................................. 205 Borrow ........................................................ .................................................................................................... 208 Topsoil ....................................................... ..................................................................................................... 625 Mulching ...................................................... ................................................................................................... 627 Fertiliz er .................................................... ...................................................................................................... 629 Seeding ....................................................... ................................................................................................... 630 Construction Staking ....................................................................................................................................... 650
614.3.2 6 Temporary Guardrail
1.Provide and maintain temporary guardrail and associated terminals and transitions conforming to the requirements for permanent installations except the contractor may furnish used ma terials. Replace guardrail components damaged during construction immediately. Remove and dispose of temporary guardrail components wh en no longer needed.
614.3.3 Sand Barrel Arrays
1.Provide sand barrel arrays and foundation at each location the plans show. Have the sand barrel manufacturer design the barrel array layout and determine the s and weights for each individual barrel. Ensure that the manufacturer's de sign at each plan location con forms to the design speed, shields the required obstruction width, and is appropriate for the traffic direction. Submit a copy of the manufacturer's design details sta mped and sealed by a professional engineer registere d in the state of Wisconsin to the engineer before installation.
2.Fill the barrels with a homogeneou s mixture of 3 parts dry san d to one part granular sodium chloride by volume. Do not use pre-packaged sand. Do not place the mixture into the barrels in a wet condition. Revise 614.3.3(3) to require ID plaques for permanent sa nd barrel arrays instead of information painted on the pad.
3.Construct concrete foundation pads as specified for concrete s idewalk under 602 conforming to dimensions the sand barrel manufacturer specifies. For permanent installations, provide an engineer- Effective with the December 2018 Letting 354 2019 Standard Spec ifications approved non-reflective aluminum plaque that identifies the man ufacturer, barrel locations and weights, traffic direction, and the installation date. Coordina te with the engineer to determine location- specific size and material requirements. Attach the plaque to t he object being shielded at an engineer- directed height above the grade and secured as the engineer dir ects.
614.3.4 Crash Cushions
1.Provide and maintain permanent crash cushions and transitions at the locations the plans show. Conform to the contract design criteria and to manufacturer's s pecifications. Certify that the installation was done according to manufactu rer's recommendat ions. Install o bject markers with reflective sheeting to the crash cushion nose piece before opening to publ ic traffic. Replace parts of crash cushions damaged during construction immediately.
2.Provide and maintain temporary crash cushions and transitions conforming to the requirements for permanent installations except the contractor may furnish used materials. Remove and dispose of crash cushions when no longer needed.
3.Provide concrete backup blocks and either concrete or asphalt foundation pads conforming to the crash cushion manufacturer's design. Construct concrete compone nts as specified for concrete sidewalk under 602.3 and construct asphalt components as specified for asphaltic surface under 465. Add 614.3.4(4) to require ID plaques for permanent crash cushions.
4.For permanent crash cushions, provide an engineer-approved non- reflective aluminum plaque that identifies the crash cushion manufacturer, model designation, and the installation date. Coordinate with the engineer to determine location-specific size and mater ial requirements. Attach the plaque to the object being shielded at an engineer-directed height above the grade and secur ed as the engineer directs.
614.3.5 Adjusting Guardrail
1.Adjust existing guardrail to t he plan height. The contractor m ay raise offset blocks up to 3 inches, and only if that is not sufficient to reach the plan elevation, may raise posts an additional 3 inches if the engineer deems that stability is not compromised. Adjustments o ver 6 inches require placing new posts and backfilling with foundation backfill conforming to 520.2 .
2.Use the existing serviceable guardrail beam, bolts, posts, and offset blocks. Rep lace existing rail components that are either unserviceable or missing. Straighten existing posts out-of-plumb by 6 inches or more. Straighten existi ng blocks and reinstall the ga lvanized nail as the plans show. Replace unstable or deteriorated posts and blocks. 614.3.6 Thrie Beam Structure Approach Retro Fits
1.Reinforce existing thrie beam by installing thrie beam retrofi t assemblies or posts of the type the bid item indicates and as the plans s how. Modify existing work conf licting with retrofitting as the plans show or engineer directs.
2.Install posts, drill holes int o existing thrie beam, and repai r damaged galvanization on thrie beam conforming to 614.3.2 .
614.3.7 Anchor Post Assemblies
1.Before drilling into concrete, adjust beam guard post location s to avoid placement conflicts. do not relocate post more than 1 foot from the plan location without t he engineer's written approval. Set anchor post assemblies with the front faces in a straight line or, if on a curve, at a uniform distance from the centerline.
614.3.8 Replacing Material
1.Remove and replace unserviceabl e posts, blocks, rail, rail har dware , and guardrail reflectors at locations within existing guardrail systems where the contract or engineer designates. Take care to avoid damage to adjacent materials remaining in place.
614.3.9 Salvaging Material
1.Dismantle and remove the rail, guardrail end treatment, or oth er component the salvaged bid item indicates from the locations t he contract designates. Minimize damage to reusable materials. Do not cut material that would be other wise reusable. Replace contract or-damaged materials that are to remain in place. Remove and dispose of all wooden component parts and unwanted or damaged materials. Restore the site.
2.Sort by component part and load reusable materials onto separa te pallets for each component part. The contractor may place hardwar e and smaller parts in clearly labeled crates or plastic buckets. Stockpile reusable material i n engineer-approved locations on t he project. Effective with the December 2018 Letting 355 2019 Standard Spec ifications (3) The contractor may use salvaged materials for temporary instal lations under the contract.
614.4 Measurement
1.The department will measure the EACH bid items under this sect ion as each individual unit acceptably completed except as follows: - The department will measure terminals as everything required within the system length the plan details show; for type 2 termi nals the department will measure rail under the linear foot r ail bid items. - The department will measure Steel Thrie Beam Structure Approach Retrofit as each individual assembly or retrofit post. - The department will measure Sand Barrel Arrays as each indivi dual sand barrel array, including foundation, measured individuall y for each required plan locati on. - The department will measure Salvaged Sand Barrels as each ind ividual barrel. - The department will measure Repl acing Guardrail Posts and Blo cks as each individual post/block unit whether the post, block, or both are replaced. - The department will measure Barrier System Grading Shaping Fi nishing as each individual plan location acceptably completed. - The department will measure Anchor Post Assemblies as each in dividual post.
2.The department will measure the LF bid items und er this sectio n by the linear foot acceptably completed, measured along the face of the rail element except: - The department will measure Steel Plate Beam Median Guard alo ng the centerline of the completed installation. - The department will measure the Short Radius bid items as the length along the curved rail only.
3.The department will measure the mo w strip bid items by the squ are yard acceptably completed, measured without reduction for the area of the post blockouts.
614.5 Payment
1.The department will pay for measured quantities at the contrac t unit price under the following bid items: ITEM NUMBER DESCRIPTION UNIT 614.0010 Barrier System Grading Shaping Finishing EACH 614.0115 - 0149 Anchorages for Steel Plate Beam Guard (type) EACH 614.0150 Anchor Assemblies for Steel Plate Beam Guard EACH 614.0200 Steel Thrie Beam Structure Approach LF 614.0210 - 0219 Steel Thrie Beam Structure Approach Retrofit (t ype) EACH 614.0220 Steel Thrie Beam Bullnose Terminal EACH 614.0230 Steel Thrie Beam LF 614.0250 Steel Thrie Beam Structure Approach Temporary LF 614.0300 - 0339 Steel Plate Beam Guard (class) LF 614.0340 Steel Plate Beam Guard Over Low-Fill Culverts Class A LF 614.0345 Steel Plate Beam Guard Short Radius LF 614.0355 Steel Plate Beam Median Guard LF 614.0360 Steel Plate Beam Guard Temporary LF 614.0370 Steel Plate Beam Guard Energy Absorbing Terminal EACH 614.0380 Steel Plate Beam Guard Energy Absorbing Terminal Tempo rary EACH 614.0390 Steel Plate Beam Guard Short Radius Terminal EACH 614.0395 - 0399 Guardrail Mow Strip (material) SY 614.0400 Adjusting Steel Plate Beam Guard LF 614.0500 - 0599 Guardra il Stiffened (type) LF 614.0700 Sand Barrel Arrays EACH 614.0800 Crash Cushions Permanent EACH 614.0805 Crash Cushions Permanent Low Maintenance EACH 614.0905 Crash Cushions Temporary EACH 614.0920 Salvaged Rail LF 614.0925 Salvaged Guardrail End Treatments EACH 614.0930 - 0939 Salvaged (component) EACH 614.0950 Replacing Guardrail Posts and Blocks EACH Effective with the December 2018 Letting 356 2019 Standard Spec ifications 614.0951 Replacing Guardrail Rail and Hardware LF Revise 614.5(1) to add a bid item for replacing guardrail reflectors. 614.0952 Replacing Guardrail Reflectors EACH 614.1000 MGS Guardrail Temporary LF 614.1100 MGS Guardrail Temporary Thrie Beam Transition LF 614.1200 MGS Guardrail Temporary Terminal EAT EACH 614.2300 MGS Guardrail 3 LF 614.2310 MGS Guardrail 3 HS LF 614.2320 MGS Guardrail 3 QS LF 614.2330 MGS Guardrail 3 K LF 614.2340 MGS Guardrail 3 L LF 614.2350 MGS Guardrail Short Radius LF 614.2500 MGS Thrie Beam Transition LF 614.2610 MGS Guardrail Terminal EAT EACH 614.2620 MGS Guardrail Terminal Type 2 EACH 614.2630 MGS Guardrail Short Radius Terminal EACH 614.8010 - 8019 Anchor Post Assemblies (type) EACH
2.Payment for the Anchorages for Steel Plate Beam Guard bid item s is full compensation for providing concrete anchorages, including concrete and reinforcement; and for excavating, backfilling, and disposing of excess material.
3.Payment for Anchor Assemblies for Steel Plate Beam Guard is fu ll compensation for providing anchors in parapet walls. Revise 614.5(4) to specify that removing and re-installing posts to verify embedment is incidental to the contract. Also revise 614.5(4) to specify that offset block-mounted guardrail reflectors are incidental; this change was implemented in ASP 6 effective with the December 2017 letting.
4.Payment for the Steel Thrie Beam, Steel Plate Beam Guard, Guar drail Stiffened, MGS Guardrail, Short Radius, and various transition bid items is full compensa tion for providing guardrail and transitions; for removing and re-installing posts as required under 614.3.2.1(4) to verify embedment depth; for offset block-mounted reflectors ; for repairing damaged zinc c oatings; and for excavating, backfilling, and disposing of surplus material.
5.Payment for the Steel Thrie Beam Structure Approach Retrofit bid items is full compensation for providing retrofit a ssemblies or posts; for required modificati ons to existing work; and for drilling and repairing damaged galvanized coated thrie beam.
6.Payment for the terminal bid i tems is full compensation for pr oviding terminals required under the selected system; for EAT reflect ive sheeting panel s and marker posts; for railing, except the department will pay separately for railing within type 2 terminals under the MGS Guardrail bid items; and for excavating, backfilling, and disposing of surplus mater ial.
7.Payment for the Guardrail Mow Strip bid items is full compensa tion for providing the paved strip adjacent to the guardrail installa tion; for concrete, asphaltic surface material, or emulsified asphalt; and for controlled low-strength backf ill including mix design a nd testing.
8.Payment for Adjusting Steel Plate Beam Guard is full compensat ion for adjusting existing guardrail including backfilling. The department will pay separately for r eplacing unserviceable posts, blocks, rail, and rail hardware under the replacing guardrail bid items.
9.Payment for Sand Barrel Arrays i s full compensation for provid ing manufacturer design details for each sand barrel array; for the foundation pad; for providing e ach system at the plan location including barrels, sand, and sodium chloride; and for ID plaques .
10.Payment for the Crash Cushions bid items is full compensation for providing cras h cushions; for the foundation pads, transition s, and backup blocks; and for ID plaques .
11.In addition to the work elements enumerated for the various pe rmanent bid items, payment for the temporary bid items also inclu des removing and disposing of mat erials when no longer needed.
12.Payment for the salvaged bid items is full compensation for di smantling and stockpiling reusable rail, guardrail end treatments, or system elements; for replacing con tractor-damaged material remaining in place; for removing and disposi ng of wooden comp onents and unwa nted or damaged materials; and for restoring the site. Effective with the December 2018 Letting 357 2019 Standard Spec ifications (13) Payment for Replacing Guardra il Posts and Blocks is full compe nsation for replacing posts and blocks; and for excavating, backfilling, and disposing of surplus mater ial.
14.Payment for Replacing Guardra il Rail and Hardwa re is full comp ensation for replacing rail and associated hardware. Add 614.5(15) to specify payment for the Replacing Guardrail Reflectors bid item.
15.Payment for Replacing Guardrail Reflectors is full compensation for replacing offset block-mounted reflectors.
16.Payment for Barrier System Gr ading Shaping Finishing is full c ompensation for providing embankment at each barrier system plan loca tion including required constru ction staking, excavation, borrow, topsoil, mulch, fertilizer, and seeding when the barrier system is outside the contract grading limits. If the work specified in 614.3.2.5 falls within the contract grading limits, the department will pay separately for that work under the construction staking, excava tion, borrow, topsoil, mulch, fertilizer, and seeding bid items.
17.Payment for the Anchor Post Assem blies bid items is full compe nsation for providing anchor post assemblies. Effective with the December 2018 Letting 358 2019 Standard Spec ifications Section 615 Treated Rustic Timber Items and Historical Markers
615.1 Description
1.This section describes constru cting timber rail guard fence, t reated timber curbs, ti mber guard posts, rustic marker posts, and historical markers, appropriate for us e in rest areas or waysides.
615.2 Materials
615.2.1 General
1.Furnish materials conforming to the following: Lumber and timber .......................................................................................................................................... 507 Paint ......................................................... ...................................................................................................... 517 Wood preser vatives ............................................ ...................................................................................... 507.2.3 Structural steel .............................................. ............................................................................................... 506.2 Miscellaneous metals .......................................... ........................................................................................ 506.2 Reinforc ement ................................................. ............................................................................................... 505
2.Furnish grade A, A-FA, A-S, A-T , A-IS, A-IP, or A-IT concrete conforming to 501 as modified in 716. Provide QMP for class III ancilla ry concrete as specified in 716.
615.2.2 Sawed Posts and Timber Curbs
1.Furnish timber posts and curbs as specified in 614.2.5 for wood posts and offset blocks.
2.The contractor may use shims fo r timber curbs that are one of the following: treated, cold-dip treated, or painted with 2 coats of the pr eservative used for the curbs.
615.2.3 Round Posts
1.Conform to the requirements for wooden posts in 616.2.2.6 . Treat round posts as specified on the plans or in the contract. Peel , trim, shave, and cut posts to l ength before treatment.
615.2.4 Timber Rails
1.Furnish sawed rails from one of the species listed in 614.2.5 for wood posts and offset blocks.
2.Furnish untreated sawed rails, unless required otherwise on the plans, conforming to the grade the plans specify. Grade sawed rails according to the grading rules and requirements specified in 507.2.2 . Furnish unsurfaced sawed rails, or surfaced on all 4 sides (S4S ), as the plans specify.
615.2.5 Furnishing Posts
1.Furnish treated, untreated, or cold-dip treated posts, as the plans, or contract specifies.
2.If treated posts are specified, then treat posts by the pressu re process according to the methods, requirements, and minimum retent ion and penetration of preservative specified for preservative treatment in 507.2.2.6 . Except, do not use creosote-coal tar or pentachlorophenol for treatment.
3.If the plans or contract speci fies cold-dip treatment, then tr eat posts in the manner specified below in
615.2.6 .
615.2.6 Cold-Dip Treatment
1.This method of preservative tr eatment consists of immersing th e wood in a solution composed of 5 percent pentachlorop henol and a suitable pet roleum solvent. All ow the wood to soak in the solution. Ensure the pentachlorophenol and petroleum solvent conforms to the requirements of 507.2.3. Unless directed otherwise, use heavy petroleum solvent. The contractor may use the solution at atmospheric temperatures. The contractor may treat both round wood posts and sawed timber. Remove both the outer and inner bark from round wood. Use sufficiently seasoned material for treatment that allows ready absorption of the preservative solut ion. Allow wood expos ed to moisture to dry before treating.
2.The soaking period for both roun d wood and sawed timber is dep endent on the type of wood, hardwood or softwood , and if using sawed ti mber, varies accordi ng to the thickness of its least dimension. Unless specified otherwise, adhere to following soak ing periods: - For round hardwood posts: 40 to 48 hours.[1] - For round softwood posts: 20 to 24 hours.[1] [1] Depending on the tendency and sp eed of the wood to absorb the oil.
3.Soak sawed hardwood timber for 5 hours per inch of thickness, with a maximum of 48 hours.
4.Soak sawed softwood timber 1/2 the time of saw ed hardwood timb er.
5.Treat posts for their full length unless th e drawings or speci al provisions specify butt treatment.
6.Before using, stack and dry all treated wood after removing fr om the solution.
Referenced in this section
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Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 359–366 of 601. View official source ↗