2564Traffic Signs and Devices

2564.1DESCRIPTION

This Work consists of fabricating, providing, and installing traffic signs and devices. A Definitions For the purpose of the Work specified in section 2564, “Traffic Signs and Devices,” the Department defines: Extruded Panel Extruded aluminum panels that, when bolted together, form an extruded sign panel. Extruded Sign Panel Extruded panels bolted together to form an extruded sign panel. Mounting Hardware Rivets, bolts, washers, nuts, post clips, and/or banding. These are used to attach Sign Panels or Extruded Sign Panels to structures and to attach Sign Panel Overlays to Extruded Sign Panels or Sign Panels. Sign Panel Sheet aluminum overlaid with sign sheeting materials. Sign Panel Overlay Sign Panel that is attached to Extruded Sign Panels or other Sign Panels.

2564.2MATERIALS

2564.3CONSTRUCTION REQUIREMENTS

A General Fabricate and install traffic signs and devices in accordance with the MN MUTCD and the AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals . Sign locations and sign structure posts lengths indicated in the Contract are approximate. Locate and stake final sign and delineator/marker locations. Obtain approval of locations by the Engineer. Determine the final post lengths for signs and delineator/markers in accordance with the offsets, mounting heights, and clearances detailed in the Contract and field verification of the proposed or in- place ground slopes. Obtain approval of the final required post lengths for I -Beam, Monotube, and Overhead Signs prior to starting fabrication of the posts. Provide shop drawings for I -Beam, Monotube, and Overhead signs in accordance with 2471.3C, “Shop Drawings.” When repairing signs with legends that are pertinent to traffic, do not extend the down- time for the sign beyond the 8-hour period from 8:00 a.m. to 4:00 p.m., unless providing a replacement sign at no additional cost to the Department. When the legend on a Sign Panel is not pertinent to existing traffic, delay installation of the Sign Panel until the legend becomes pertinent or install the sign and place an effective cover over the non-pertinent legend. Covered legend shall be uncovered when legend becomes pertinent. Provide opaque covers that do not hold moisture against the sign face. The Department does not approve burlap as an effective cover for retroreflective signs. There is no additional cost to the Department for the Contractor to cover, maintain, and uncover legends on Sign Panels. Replace topsoil, sodded, and seeded areas disturbed by the Work and dispose of excess excavated Materials as approved by the Engineer. A.1 Sign Fabrication Fabricate Sign Panels in accordance with 3352 “Signs.”

Use sheet aluminum sign base material for Sign Panels. Provide extruded panels in accordance with 3352.2A.2, “Extruded Aluminum, Bolted Type,” and assemble extruded sign panel. Mount sign panel overlay to extruded sign panel with 3/16 inch stainless steel pull-through rivets as fasteners to attach the sign panel overlay to the extruded sign panel. Tightly butt the sign panel overlay sections a nd rivet to the extruded sign panel on centers no greater than 12 inches vertically and horizontally. Do not mount sign panel overlay sections with horizontal butt joints for extruded sign panels less than 144 inches tall. Rivet the edges and corners of each sign panel overlay section. Do not place rivets within 1 inch of the extruded sign panel joints. The sign panel overlay must be flat after attaching to the extruded sign panel. Provide fluorescent yellow retroreflective sheeting for all yellow signs, yellow markers, yellow delineators, and yellow background on Sign Panel Overlays. Provide fluorescent yellow - green retroreflective sheeting on warning signs and their supplemental p laques associated with pedestrians, bicyclists, playgrounds, schools. Provide non-reflectorized black sign face Material and fluorescent yellow retroreflective sheeting for sign legend for OM1-2 Type 1 Object Markers. Provide non-reflectorized black sign face Material and red retroreflective sheeting for sign legend for OM4-2 Type 4 Object Markers. When warning sign plaques are mounted on the same Structure as a warning sign, match the plaque color and sheeting type with the primary warning sign color and sheeting type. A.2 Temporary Traffic Control Provide signs for temporary traffic control meeting the requirements of the Standard Signs and Markings Manual, MN MUTCD, and the Contract. Provide barricades meeting the requirements of Standard Plate 8000. Install nylon washer spacers between the temporary traffic construction Sign Panels and the in-place Sign Panels. Install temporary traffic control devices before beginning Work. Maintain temporary traffic control devices while in place and remove them if not required. A.3 Scheduling of Work Schedule Work in accordance with the following requirements:

directional sign for each exit that is in service at all times

approval for removing an existing sign is contingent upon compliance with Items 1 and 2 above and upon completion of a constructed, functional replacement sign

replacement signs are installed the same workday that the in-place signs are removed on roads open to traffic.

B Modify Post Do not splice I-Beam sign post sections below the friction fuse. Extend I-Beam sign posts or panel mounting posts by bolt splicing as required by the contract and in accordance with 2471, “Structural Metals.” Galvanize post extensions and repair galvanized areas marred by cutting in accordance with 2471, “Structural Metals.” C Install Extruded Sign Panel Install a salvaged or Department provided extruded sign panel as required by the contract. Use new post clips, Type 304 stainless-steel post clip bolts, stainless-steel washers and nylon insert stainless-steel locknut to attach extruded panel to posts. Torque each stainless steel post clip bolt to 21 foot lbf using a wrench with torque number when attaching extruded sign panel to posts. Lubricate the faying surface between the washer and nut with either Bridge Grease under Bridge products or Electrolytic Corrosion inhibitor Lubricant under Lighting products from the APL before tightening the nut. Calibrate tools prior to tightening nuts. Nuts are not to be overtightened. D Install Sign Panel Install a salvaged or Department provided sign panel with new mounting hardware to sign structure. Field Punch salvaged sign panels as needed based on the Punching Guides found in MnDOT’s Standard Signs and Markings Manual website: http://www.dot.state.mn.us/trafficeng/publ/signsmanual/index.html E Extend Walkway Support Extend each walkway support on existing overhead sign structures as required by the contract. Galvanize support extensions and repair galvanized areas marred by cutting or welding in accordance with 2471, “Structural Metals.” F Friction Fuse Provide and install a friction fuse on each existing I-Beam sign post as required by the Contract and the following:

and in-place Mounting Hardware, and dispose of these items in accordance with 2104, “Removing Pavement and Miscellaneous Structures”

plate. Provide Mounting Hardware as required by the Contract

G Keeper Plate Provide and install a keeper plate on each existing I-Beam sign post as required by the Contract. Verify sign post dimensions in the field. Immediately before installing keeper plates, clean the base connection plate to remove grit, dirt, and deleterious Material. Reinstall the post in accordance with base connection bolting procedures shown in the Contract. Replace missing, damaged, or rusty hardware.

H Infiltration Area Marker Provide infiltration area marker panel as required by the contract. Provide and install the three-wall base square tube sign structure and attach the infiltration area marker panel with new mounting hardware required by the contract. I Overhead Sign Structure Repair Repair an existing overhead sign Structure in accordance with the 2123, “Equipment Rental,” and the following: Contact the Department's Structural Metals Inspection Unit (DSMIU) to schedule inspection of sign Structures. Perform the inspection before removing the sign Structure from storage, or after salvaging the Structure. Correct the following conditions, if encountered, as determined by the DSMIU:

Perform repairs in accordance with 2471, “Structural Metals.” Verify that each locking pin fits completely into the locking pin hole in the handrail hinge, while the handrail is in the raised position. For locking pins that do not fit, drill out the handrail hinge to make a proper fit. Repair damage to galvanized surfaces in accordance with 2471.3L.1, “Galvanizing.” After completing the repairs and before installation, obtain reinspection by the DSMIU. J Install Sign Provide and install new sign structure. Install salvaged or Department provided sign panel(s) with new stringers and mounting hardware to riser post. Install sign structure plumb. Remove and replace bases that do not produce a plumb post. Field Punch salvaged sign panels as needed based on the Punching Guides found in the Standard Signs and Markings Manual website: http://www.dot.state.mn.us/trafficeng/publ/signsmanual/index.html K Install Delineator/Marker Panel Install a salvaged or Department provided delineator/marker panel with new mounting hardware to sign structure. Field Punch salvaged delineator/marker panels as needed based on the Punching Guides found in the Standard Signs and Markings Manual website: http://www.dot.state.mn.us/trafficeng/publ/signsmanual/index.html

L Install Delineator/Marker Install new sign structure. Install salvaged or Department provided delineator/marker with new mounting hardware. Install sign structure plumb. Remove and replace bases that do not produce a plumb post. M Foundation Special OH For the Foundation Special OH work on Signs designated for repair in the Plans: Remove the top 6” of concrete surrounding the anchor rods. Clean all debris and grease at the top concrete surface and anchor rods after removal. No separate payment will be made for removal of grout and concrete. Installation of Coupling Nuts and Threaded Anchor Rods: The surfaces of the anchor rods shall be free of concrete, grease or other debris. Saw- cut the corroded part of inplace anchor rods and, if necessary, tap -thread the remaining part of the anchor rods with the length that meets the coupling nut manufacturer’s minimum required length. Clean the anchor rods and concrete of any debris and oil due to the thread- tapping. Thread coupling nut over the anchor rod to have equal amounts of threading of the existing and new anchor rods inside the coupling. This above mentioned work shall be inspected by a qualified and certified third party inspector from independent testing agencies that are accepted by the Engineer. Submit the inspection report to MnDOT for review and filing. The top of all extended anchor rods shall be at the elevations as shown in the Plan. Install the PVC conduit extension to project 1” above the foundation design elevation. Provide a template for anchor rod placement and keep the template in place until the concrete has set. Apply anti-seize compound to all threads with a brush. Use an approved bridge grease found on the APL, Bridge. Construct footing extensions in accordance with 2401, “Concrete Bridge Construction.” Apply bonding grout to the in-place concrete immediately before placing the new concrete against it. Use an approved epoxy bonding agent found on the APL,Concrete, Epoxies (non-bridge applications). N Install I-Beam Sign Provide and install new footings and posts. Attach the posts with new keeper plates and friction fuses to the new footings. Attach the salvaged extruded panel to the posts with new post clips, Type 304 stainless -steel post clip bolts, stainless-steel washers, and nylon insert stainless-steel locknut. Torque each stainless steel post clip bolt to 21 foot lbf using a wrench with torque number when attaching extruded sign panel to posts. Lubricate the faying surface between the washer and nut with either Bridge Grease under Bridge products or Electrolytic Corrosion inhibitor Lubricant under Lighting products from the APL before tightening the nut. Calibrate tools prior to tightening nuts. Nuts are not to be overtightened.

Installations shall be in accordance with the contract and details shown on the plans. Repair damaged galvanized surfaces in accordance with 2471.3L.1, “Galvanizing.” O Install Monotube Sign Install salvaged or Department provided monotube structure on new concrete footings. Obtain Engineer’s approval of the wrench used for tightening the anchor rod nuts and provide proof of calibration performed within the last 12 months from an accredited calibration service before installing the post. Tighten anchor rods in accordance with the MnDOT Anchor Rod Tightening Handbook - New Installation Procedures (https://edocs- public.dot.state.mn.us/edocs_public/DMResultSet/download?docId=11138998). Complete a MnDOT Anchor Rod Tightening Form (https://edocs- public.dot.state.mn.us/edocs_public/DMResultSet/download?docId=11116678) and submit the completed form to the Engineer. Install salvaged or Department provided sign panels and stringers to the monotube structure with new mounting hardware. Repair damaged galvanized surfaces in accordance with 2471.3L.1, “Galvanizing.” P Install Overhead Sign Install salvaged or Department provided overhead sign structure on new concrete footings. Obtain Engineer’s approval of the wrench used for tightening the anchor rod nuts and provide proof of calibration performed within the last 12 months from an accredited calibration service before installing the post. Tighten anchor rods in accordance with the MnDOT Anchor Rod Tightening Handbook - New Installation Procedures (https://edocs- public.dot.state.mn.us/edocs_public/DMResultSet/download?docId=11138998). Complete a MnDOT Anchor Rod Tightening Form (https://edocs- public.dot.state.mn.us/edocs_public/DMResultSet/download?docId=11116678) and submit the completed form to the Engineer. Install salvaged or Department provided extruded sign panels and panel mounting posts with new post clips, Type 304 stainless-steel post clip bolt, stainless-steel washer and nylon insert stainless- steel locknut as required by the contract. Torque each stainless steel post clip bolt to 21 foot•lbs using a wrench with torque number when attaching extruded sign panel to posts. Lubricate the faying surface between the washer and nut with either Bridge Grease under Bridge products or Electrolytic Corrosion inhibitor Lubricant under Lighting products from the APL before tightening the nut. Calibrate tools prior to tightening nuts. Nuts are not to be overtightened. Repair damaged galvanized surfaces in accordance with 2471.3L.1, “Galvanizing.” Q Install Overhead Bridge Mounted Sign Install salvaged or Department provided extruded sign panels with new post clips, Type 304 stainless-steel post clip bolts, stainless steel washers, and nylon insert stainless -steel locknuts on new bridge mount sign structures as required by the contract.

Torque each stainless steel post clip bolt to 21 foot pounds using a wrench with torque number when attaching extruded sign panel to posts. Lubricate the faying surface between the washer and nut with either Bridge Grease under Bridge products or Electrolytic Corrosion inhibitor Lubricant under Lighting products from the APL before tightening the nut. Calibrate tools prior to tightening nuts. Nuts are not to be overtightened. Repair damaged galvanized surfaces in accordance with 2471.3L.1, “Galvanizing.” R Delineator/Marker Provide delineator/marker panel as required by the contract. Provide and install the sign structure and attach the delineator/marker panel with new mounting hardware required by the contract. Install sign structure plumb. Remove and replace bases that do not produce a plumb post. Affix a Department-provided warning sticker to the backside of each marker panel directly above the fabrication sticker. Warning stickers are available at the Department's Transportation District Office specified in the Contract. Provide thirty calendar days advance notice before picking up the stickers. S Delineator/Marker Panel Provide delineator/marker panel as required by the contract. Attach the delineator/marker panel with new mounting hardware required by the contract. Affix a Department-provided warning sticker to the backside of each marker panel directly above the fabrication sticker. Warning stickers are available at the Department's Transportation District Office specified in the Contract. Provide thirty calendar days advance notice before picking up the stickers. T Median Barrier Footing (Shaft) Obtain and review the soils information and foundation recommendation(s) found within the project specific foundations report located on the Department’s Foundations Unit’s Foundations Reports website: http://www.dot.state.mn.us/materials/borings.html Excavate for footing and construct footing as shown in the contract. After footing has cured, backfill to proposed ground elevation. Replace any removed pavement and dispose of excess excavation. Construct footings as required by the contract and in accordance with 2401.3, “Concrete Bridge Construction: Construction Requirements.” The Department will only pay for the planned design quantity for each footing at the contract unit price. If the shaft embedment depth cannot be achieved, the Contractor shall coordinate with the Department’s Foundations Unit and the Engineer to determine a suitable alternative footing. Concrete footing will be paid in accordance with 1402.2, “Differing Site Conditions.” The Contractor may use undisturbed earth to form concrete placement if the soil is stable enough to allow concrete placement as determined by the Engineer and the Contractor takes precautions to prevent contamination of the concrete. Provide non-metallic conduit and fittings to connect to the non metallic conduit in adjacent median barrier as detailed in the contract.

Mark both ends of anchor rods in the anchor rod assembly in accordance with ASTM F1554 , Standard Specification for Anchor Bolts, Steel, 36, 55, and 105-ksi Yield Strength supplementary requirement S3. The markings required are die stamped grade identification and color. The color shall be: Blue for Grade 36 Yellow for Grade 55 Red for Grade 105. Provide a surface finish and color that matches the adjacent median barrier. Ensure concrete has cured for a minimum of seven days prior to installing sign post on concrete footings. U Median Barrier Footing (Spread) Obtain and review the soils information and foundation recommendation(s) found within the project specific foundations report located on the Department’s Foundations Unit’s Foundations Reports website: http://www.dot.state.mn.us/materials/borings.html Excavate for footing and construct footing as shown in the contract. After footing has cured, backfill to proposed ground elevation. Replace any removed pavement and dispose of excess excavation. Construct footings as required by the contract and in accordance with 2401.3, “Concrete Bridge Construction: Construction Requirements.” The Contractor may use undisturbed earth to form concrete placement if the soil is stable enough to allow concrete placement as determined by the Engineer and the Contractor takes precautions to prevent contamination of the concrete. Provide non-metallic conduit and fittings to connect to the non metallic conduit in adjacent median barrier as detailed in the contract. Mark both ends of anchor rods in the anchor rod assembly in accordance with ASTM F1554, Standard Specification for Anchor Bolts, Steel, 36, 55, and 105-ksi Yield Strength supplementary requirement S3. The markings required are die stamped grade identification and color. The color shall be: Blue for Grade 36 Yellow for Grade 55 Red for Grade 105. Provide a surface finish and color that matches the adjacent median barrier. Ensure concrete has cured for a minimum of seven days prior to installing sign post on concrete footings. V Concrete Footing (I-Beam) Obtain and review the soils information and foundation recommendation(s) found within the project specific foundations report located on the Department’s Foundations Unit’s Foundations Reports website:

http://www.dot.state.mn.us/materials/borings.html Excavate for footing and construct footing as shown in the contract. After footing has cured, backfill to proposed ground elevation. Replace any removed pavement and dispose of excess excavation. Construct footings as required by the contract and in accordance with 2401.3, “Concrete Bridge Construction: Construction Requirements.” The Department will only pay for the planned design quantity for each footing at the contract unit price. If the footing embedment depth cannot be achieved, the Contractor shall coordinate with MnDOT Foundations Unit and the Engineer to determine a suitable alternative footing. Concrete footing will be paid in accordance with 1402.2, “Differing Site Conditions.” The Contractor may use undisturbed earth to form concrete placement if the soil is stable enough to allow concrete placement as determined by the Engineer and the Contractor takes precautions to prevent contamination of the concrete. Provide a rubbed-surface finish on exposed concrete surfaces. Ensure concrete has cured for a minimum of seven days prior to installing sign post on concrete footings. W Concrete Footing (Overhead Shaft) Obtain and review the soils information and foundation recommendation(s) found within the project specific foundations report located on the Department’s Foundations Unit’s Foundations Reports website: http://www.dot.state.mn.us/materials/borings.html Excavate for footing and construct footing as shown in the contract. After footing has cured, backfill to proposed ground elevation. Replace any removed pavement and dispose of excess excavation. Construct footings as required by the contract and in accordance with 2401.3, “Concrete Bridge Construction: Construction Requirements.” The Department will only pay for the planned design quantity for each footing at the contract unit price. If the shaft embedment depth cannot be achieved, the Contractor shall coordinate with the Department’s Foundations Unit and the Engineer to determine a suitable alternative footing. Concrete footing will be paid in accordance with 1402.2, “Differing Site Conditions.” The Contractor may submit an alternate design for approval by the Engineer with the understanding that, if approved, the Department will not adjust the contract quantities or unit prices. If the Engineer approves the alternate design, the Contractor may proceed. Provide design details for alternate drilled shaft footing designs in accordance with any one of the following:

the column base plate. Use the planned longitudinal reinforcement bars without bending. Use either spiral reinforcement or tie bars spaced at 6 inch centers for the ful l length of the shaft.

about 6 feet below the top. Before placing new concrete above the construction joint, coat the surface of the in-place concrete with a Department-approved bonding agent.

Lap vertical reinforcement bars a length equal to 40 times the diameter of the reinforcement bar used. The Contractor may use undisturbed earth to form concrete placement if the soil is stable enough to allow concrete placement as determined by the Engineer and the Contractor takes precautions to prevent contamination of the concrete. Mark both ends of anchor rods in the anchor rod assembly in accordance with ASTM F1554, Standard Specification for Anchor Bolts, Steel, 36, 55, and 105-ksi Yield Strength supplementary requirement S3. The markings required are die stamped grade identification and color. The color shall be: Blue for Grade 36 Yellow for Grade 55 Red for Grade 105. Provide a rubbed-surface finish on exposed concrete surfaces. Ensure concrete has cured for a minimum of seven days prior to installing sign post on concrete footings. X Concrete Footing (Overhead Spread) Obtain and review the soils information and foundation recommendation(s) found within the project specific foundations report located on the Department’s Foundations Unit’s Foundations Reports website: http://www.dot.state.mn.us/materials/borings.html Excavate for footing and construct footing as shown in the contract. After footing has cured, backfill to proposed ground elevation. Replace any removed pavement and dispose of excess excavation. Construct footings as required by the contract and in accordance with 2401.3, “Concrete Bridge Construction: Construction Requirements.” The Contractor may use undisturbed earth to form concrete placement if the soil is stable enough to allow concrete placement as determined by the Engineer and the Contractor takes precautions to prevent contamination of the concrete. Mark both ends of anchor rods in the anchor rod assembly in accordance with ASTM F1554, Standard Specification for Anchor Bolts, Steel, 36, 55, and 105-ksi Yield Strength supplementary requirement S3. The markings required are die stamped grade identification and color. The color shall be: Blue for Grade 36 Yellow for Grade 55 Red for Grade 105. Provide a rubbed-surface finish on exposed concrete surfaces. Ensure concrete has cured for a minimum of seven days prior to installing sign post on concrete footings.

Y Concrete Footing (Monotube) Obtain and review the soils information and foundation recommendation(s) found within the project specific foundations report located on the Department’s Foundations Unit’s Foundations Reports website: http://www.dot.state.mn.us/materials/borings.html Excavate for footing and construct footing as shown in the contract. After footing has cured, backfill to proposed ground elevation. Replace any removed pavement and dispose of excess excavation. Construct footings as required by the contract and in accordance with 2401.3, “Concrete Bridge Construction: Construction Requirements.” The Department will only pay for the planned design quantity for each footing at the contract unit price. If the shaft embedment depth cannot be achieved, the Contractor shall coordinate with the Department’s Foundations Unit and the Engineer to determine a suitable alternative footing. Concrete footing will be paid in accordance with 1402.2, “Differing Site Conditions.” The Contractor may use undisturbed earth to form concrete placement if the soil is stable enough to allow concrete placement as determined by the Engineer and the Contractor takes precautions to prevent contamination of the concrete. Mark both ends of anchor rods in the anchor rod assembly in accordance with ASTM F1554, Standard Specification for Anchor Bolts, Steel, 36, 55, and 105-ksi Yield Strength supplementary requirement S3. The markings required are die stamped grade identification and color. The color shall be: Blue for Grade 36 Yellow for Grade 55 Red for Grade 105. Provide a rubbed-surface finish on exposed concrete surfaces. Ensure concrete has cured for a minimum of seven days prior to installing sign post on concrete footings. Z Structural Steel – I-Beam Sign Manufacture and fabricate structural steel in accordance with 2471, “Structural Metals,” and the following additional requirements. Provide shop drawings for I-beam supported sign structures in accordance with 2471.3C, “Shop Drawings.” Unless otherwise required by the contract, provide and install galvanized structural steel footing posts for I-beam supported signs in accordance with 2452, “Piling,” 2471, “Structural Metals,” and the following:

minimum embedment cannot be achieved, contact the Engineer for alternate foundation details.

before back filling.

AA Structural Steel – Overhead Sign Post Manufacture and fabricate structural steel in accordance with 2471, “ Structural Metals,” and the following additional requirements. Provide shop drawings for overhead sign structures in accordance with 2471.3C , “Shop Drawings.” Assemble the posts in the shop before galvanizing. Check posts for straightness, alignment and dimensions and correct any variations. Correct warpage from galvanizing before installing structural steel. Correct warpage that will interfere with fit-up from hot-dip galvanizing before installing structural steel. Drill or mechanically cut overhead sign post base plate anchor rod holes. Install posts for overhead signs. Obtain Engineer’s approval of the wrench used for tightening the anchor rod nuts and provide proof of calibration performed within the last 12 months from an accredited calibration service before installing the post. Tighten anchor rods in accordance with the MnDOT Anchor Rod Tightening Handbook - New Installation Procedures (https://edocs- public.dot.state.mn.us/edocs_public/DMResultSet/download?docId=11138998). Complete a MnDOT Anchor Rod Tightening Form (https://edocs- public.dot.state.mn.us/edocs_public/DMResultSet/download?docId=11116678) and submit the completed form to the Engineer. BB Structural Steel – Overhead Sign Truss Manufacture and fabricate structural steel in accordance with 2471, “ Structural Metals,” and the following additional requirements. Provide shop drawings for overhead sign structures in accordance with 2471.3C , “Shop Drawings.” Assemble the truss sections in the shop before galvanizing. Check truss sections for straightness, alignment and dimensions and correct any variations. Correct warpage from galvanizing before installing structural steel. Correct warpage that will interfere with fit-up from hot-dip galvanizing before installing structural steel. Ensure main chord angles for overhead sign structures that are at least 1/2 inch thick, meet a Charpy V notch impact strength requirement of 15 ft lbf at 40 °F. CC Structural Steel – Overhead Walkway Manufacture and fabricate structural steel in accordance with 2471, “ Structural Metals,” and the following additional requirements. Provide shop drawings for overhead sign structures in accordance with 2471.3C , “Shop Drawings.” Assemble the walkway sections in the shop before galvanizing. Check walkway sections for straightness, alignment and dimensions and correct any variations. Correct warpage from galvanizing before installing structural steel. DD Structural Steel – Monotube Sign Manufacture and fabricate structural steel in accordance with 2471, “ Structural Metals,” and the following additional requirements.

Provide shop drawings for monotube sign structures in accordance with 2471.3C , “Shop Drawings.” Assemble the posts and beams in the shop before galvanizing. Check posts and beams for straightness, alignment and dimensions and correct any variations. Correct warpage from galvanizing before installing structural steel. Correct warpage that will interfere with fit-up from hot-dip galvanizing before installing structural steel. Drill or mechanically cut monotube sign post base plate anchor rod holes. Install posts for monotube signs. Obtain Engineer’s approval of the wrench used for tightening the anchor rod nuts and provide proof of calibration performed within the last 12 months from an accredited calibration service before installing the post. Tighten anchor rods in accordance with the MnDOT Anchor Rod Tightening Handbook - New Installation Procedures (https://edocs- public.dot.state.mn.us/edocs_public/DMResultSet/download?docId=11138998). Complete a MnDOT Anchor Rod Tightening Form (https://edocs- public.dot.state.mn.us/edocs_public/DMResultSet/download?docId=11116678) and submit the completed form to the Engineer. EE Structural Steel – Bridge Mounted Truss Manufacture and fabricate structural steel in accordance with 2471, “ Structural Metals,” and the following additional requirements. Provide shop drawings for bridge mounted truss structures in accordance with 2471.3.C, “Shop Detail Drawings.” Assemble the truss sections in the shop before galvanizing. Check truss sections for straightness, alignment and dimensions and correct any variations. Correct warpage from galvanizing before installing structural steel. Correct warpage that will interfere with fit-up from hot-dip galvanizing before installing structural steel. Ensure main chord angles for bridge mounted truss structures that are at least 1/2 inch thick, meet a Charpy V notch impact strength requirement of 15 ft lbf at 40 °F. FF Structural Steel – Panel Mounting Post Manufacture and fabricate structural steel in accordance with 2471, “ Structural Metals,” and the following additional requirements. Assemble the panel mounting post in the shop before galvanizing. Check panel mounting post for straightness, alignment and dimensions and correct any variations. Correct warpage from galvanizing before installing structural steel. GG Sign Fabricate the sign panels in accordance with 3352, “Signs.” Package, deliver, store, and install sign panels in accordance with 1607, “ Handling Materials,” 3352, “Signs,” and the retroreflective sheeting manufacturer's recommendations. Provide and install new sign structure in accordance with the plans and attach new sign panels with new stringers as needed and mounting hardware. Install sign structure plumb. Remove and replace bases that do not produce a plumb post.

Affix a Department-provided warning sticker to the backside of each sign panel directly above the fabrication sticker. Warning stickers are available at the Department's Transportation District Office specified in the Contract. Give the Transportation District’s contact person thirty calendar days advance notice before picking up the stickers. HH Sign Panel Fabricate the sign panel in accordance with 3352, “Signs.” Package, deliver, store, and install sign panels in accordance with 1607, “ Handling Materials,” 3352, “Signs,” and the retroreflective sheeting manufacturer's recommendations. Attach new panel to support structure using new stringers as needed and mounting hardware. Affix a Department-provided warning sticker to the backside of each sign panel directly above the fabrication sticker. Warning stickers are available at the Department's Transportation District Office specified in the Contract. Give the Transportation Dist rict’s contact person thirty calendar days advance notice before picking up the stickers. II Sign Panel Overlay Fabricate the sign panel overlay in accordance with 3352, “Signs.” Package, deliver, store, and install sign panel overlays in accordance with 1607, “ Handling Materials,” 3352, “Signs,” and the retroreflective sheeting manufacturer's recommendations. Remove all existing post clips and dispose of them in accordance with 2104, “ Removing Pavement and Miscellaneous Structures.” Reattach extruded sign panels to sign posts or panel mounting posts with new post clips, Type 304 stainless-steel post clip bolts, stainless-steel washers and nylon insert stainless-steel locknut. Torque each stainless steel post clip bolt to 21 foot lbf using a wrench with torque number. Lubricate the faying surface between the washer and nut with either Bridge Grease under Bridge products or Electrolytic Corrosion inhibitor Lubricant under Lighting products from the APL before tightening the nut. Calibrate tools prior to tightening nuts. Nuts are not to be overtightened. Remove any inplace sign panel overlays and dispose of them in accordance with 2104, “Removing Pavement and Miscellaneous Structures.” Remove or saw existing extruded panel sections to match new sign panel overlay size. Saw panel mounting posts as needed for reduced extruded panel height. Dispose of removed materials in accordance with 2104, “Removing Pavement and Miscellaneous Structures.” For partial sign panel overlays do not replace post clips, remove sign panel overlay or remove sign panel. Attach partial sign panel overlay to existing sign panel overlay or sign panel. Attach the sign panel overlay to the extruded sign panel or sign panel with 3/16 inch stainless steel rivets. Rivet sign panel overlay on 12 inch vertical and horizontal centers. Rivet the edges and corners of each sign panel overlay. Tightly butt the sign panel overlays vertically. Do not mount sign panel overlay sections with horizontal butt joints for extruded sign panels less than 144 inches tall. Do not mount sign panel overlay sections with horizontal butt joints for extruded sign panels less than 1 44 inches tall. Do not place rivets within 1 inch of extruded sign panel joints. Sign panel overlays must be flat after attaching to extruded sign panels or sign panels. JJ Extruded Panel Fabricate the extruded panel in accordance with 3352, “Signs” and assemble to form extruded sign panels in accordance with 2564.3A.1, “Sign Fabrication.”

Attach extruded sign panels to I-Beam sign posts or panel mounting posts with new post clips, Type 304 stainless-steel post clip bolt, stainless steel washers, and nylon insert stainless -steel locknut. Torque each stainless steel post clip bolt to 21 foot lbf using a wrench with torque number. Lubricate the faying surface between the washer and nut with either Bridge Grease under Bridge products or Electrolytic Corrosion Inhibitor Lubricant under Lighting products from the APL before tightening the nut. Calibrate tools prior to tightening nuts. Nuts are not to be overtightened.

2564.4METHOD OF MEASUREMENT

The Engineer will measure Median barrier footing as a complete unit, including excavation, concrete installation, metal reinforcement, anchorage assemblies, conduit, and backfill. The Engineer will measure Sign support as a complete unit, including excavation, concrete footings, metal reinforcement, anchorage assemblies, conduit, metal sign Structure, overhead identification plate, and backfill. A Modify Post The Engineer will measure modify post using either structural steel – I-beam sign or structural steel – panel mounting post pay items. These items include providing posts and splice plates. The Engineer will base the computed weight on the quantity tables in the contract. B Install Extruded Sign Panel The Engineer will measure install extruded sign panel as a complete unit, including new mounting hardware used to install salvaged or Department provided extruded sign panel. C Install Sign Panel The Engineer will measure install sign panel as a complete unit, including new mounting hardware and stringers used to install salvaged or Department provided sign panel. D Extend Walkway Support The Engineer will measure Extend walkway support as a complete unit, including adding walkway support extensions as shown in the Contract. E Friction Fuse The Engineer will measure Friction fuse as a complete unit, including removing in -place Friction fuse and installing new friction plate, hinge plate, and hardware. F Keeper Plate The Engineer will measure Keeper plate as a complete unit, including removing in -place keeper plate and installing new keeper plate. G Infiltration Area Marker The Engineer will measure infiltration area marker as a complete unit, including new post, new mounting hardware, and new infiltration area marker panel. H Overhead Sign Structure Repair The Engineer will measure Overhead sign Structure repair by the number of hours required to complete the repair, including use and operation of Equipment, travel time inside the Project limits, and Work and Materials involved. Overhead sign Structure repair is exempt from 1903, “Compensation for Altered Quantities.” I Install Sign The Engineer will measure install sign as a complete unit, including new sign structure, new stringers, and new mounting hardware used to install salvaged or Department provided sign panel(s).

J Install Delineator/Marker Panel The Engineer will measure install delineator/marker panel as a complete unit, including new mounting hardware and stringers used to install salvaged or Department provided delineator/marker panel K Install Delineator/Marker The Engineer will measure install delineator/marker as a complete unit, including new sign structure, and salvaged or Department provided delineator/marker attached with new mounting hardware. L Foundation Special OH The Engineer will measure foundation special OH as a complete unit, including removal of concrete, cutting and threading anchor rods, new anchor rod extensions, and new concrete. M Install I-Beam Sign The Engineer will measure install I-Beam sign as a complete unit, including new footings, new posts, new friction fuse, salvaged or Department provided extruded sign panel, and new mounting hardware. N Install Monotube Sign The Engineer will measure install monotube sign as a complete unit, including installing salvaged or Department provided structure, sign panels and stringers with new mounting hardware. O Install Overhead Sign The Engineer will measure install overhead sign as a complete unit, including installing salvaged or Department provided structure, extruded sign panels, and panel mounting posts with new post clips. P Install Overhead Bridge Mounted Sign The Engineer will measure install overhead bridge mounted sign as a complete unit, including new bridge mount structure, and installing salvaged or Department provided extruded sign panels using new post clips. Q Delineator/Marker The Engineer will measure delineator/marker as a complete unit, including new post, new mounting hardware, and new delineator/marker panel. R Delineator/Marker Panel The Engineer will measure delineator/marker panel as a complete unit, including new delineator/marker panel and new mounting hardware. S Median Barrier Footing (Shaft) The Engineer will measure median barrier footing (shaft) by the cubic yard of concrete based on the dimensions required by the contract, including footing construction, metal reinforcement, anchorage assemblies, conduit, excavation, and backfill. T Median Barrier Footing (Spread) The Engineer will measure median barrier footing (spread) by the cubic yard of concrete based on the dimensions required by the contract, including footing construction, metal reinforcement, anchorage assemblies, conduit, excavation, and backfill. U Concrete Footing (I-Beam) The Engineer will measure concrete footing (I-Beam) by the cubic yard of concrete based on the dimensions required by the contract, including footing construction, metal reinforcement, anchorage assemblies, excavation, and backfill.

V Concrete Footing (Overhead Shaft) The Engineer will measure concrete footing (overhead shaft) by the cubic yard of concrete based on the dimensions required by the contract, including footing construction, metal reinforcement, anchorage assemblies, excavation, and backfill. W Concrete Footing (Overhead Spread) The Engineer will measure concrete footing (overhead spread) by the cubic yard of concrete based on the dimensions required by the contract, including footing construction, metal reinforcement, anchorage assemblies, excavation, and backfill. X Concrete Footing (Monotube) The Engineer will measure concrete footing (monotube) by the cubic yard of concrete based on the dimensions required by the contract, including footing construction, metal reinforcement, anchorage assemblies, excavation, and backfill. Y Structural Steel – I-Beam Sign The Engineer will measure structural steel – I-beam sign separately by the computed weight of structural steel incorporated in accordance with the measurement provisions of 2402.4A, “ Weight.” The Engineer will not measure bolts, nuts, rivets, washers, and shims used in the fabrication and erection of signs, and will not apply the provisions of 2402.4A, “Weight,” that provide a percent increase in weight. The Engineer will measure structural steel – I-beam sign by the pound, including providing and erecting posts, keeper plate, friction fuse, and H-piles. The Engineer will base the computed weight on the quantity tables in the contract. Z Structural Steel – Overhead Sign Post The Engineer will measure structural steel – overhead sign post separately by the computed weight of structural steel incorporated in accordance with the measurement provisions of 2402.4A, “Weight.” The Engineer will not measure bolts, nuts, rivets, washers, and shims used in the fabrication and erection of signs, and will not apply the provisions of 2402.4A, “Weight,” that provide a percent increase in weight. The Engineer will measure structural steel – overhead sign post by the pound, including providing and erecting posts, truss connection plates, and baseplate. The Engineer will base the computed weight on the quantity tables in the contract. AA Structural Steel – Overhead Sign Truss The Engineer will measure structural steel – overhead sign truss separately by the computed weight of structural steel incorporated in accordance with the measurement provisions of 2402.4A, “Weight.” The Engineer will not measure bolts, nuts, rivets, washers, and shims used in the fabrication and erection of signs, and will not apply the provisions of 2402.4A, “Weight,” that provide a percent increase in weight. The Engineer will measure structural steel – overhead sign truss by the pound, including providing and erecting truss members. The Engineer will base the computed weight on the quantity tables in the contract. BB Structural Steel – Overhead Walkway The Engineer will measure structural steel – overhead walkway separately by the computed weight of structural steel incorporated in accordance with the measurement provisions of 2402.4A, “Weight.” The Engineer will not measure bolts, nuts, rivets, washers, and shims used in the fabrication and erection of signs, and will not apply the provisions of 2402.4A, “Weight,” that provide a percent increase in weight.

The Engineer will measure structural steel – overhead walkway by the pound, including providing and erecting walkway supports and grating. The Engineer will base the computed weight on the quantity tables in the contract. CC Structural Steel – Monotube Sign The Engineer will measure structural steel – monotube sign separately by the computed weight of structural steel incorporated in accordance with the measurement provisions of 2402.4A, “ Weight.” The Engineer will not measure bolts, nuts, rivets, washers, and shims used in the fabrication and erection of signs, and will not apply the provisions of 2402.4A, “Weight,” that provide a percent increase in weight. The Engineer will measure structural steel – monotube sign by the pound, including providing and erecting posts, beams, post-beam connection plates, and baseplate. The Engineer will base the computed weight on the quantity tables in the contract. DD Structural Steel – Bridge Mounted Truss The Engineer will measure structural steel – bridge mounted truss separately by the computed weight of structural steel incorporated in accordance with the measurement provisions of 2402.4A, “Weight.” The Engineer will not measure bolts, nuts, rivets, washers, and shims used in the fabrication and erection of signs, and will not apply the provisions of 2402.4A, “Weight,” that provide a percent increase in weight. The Engineer will measure structural steel – bridge mounted truss by the pound, including providing and erecting truss members, and fixture mounting channels. The Engineer will base the computed weight on the quantity tables in the contract. EE Structural Steel – Panel Mounting Post The Engineer will measure structural steel – panel mounting post separately by the computed weight of structural steel incorporated in accordance with the measurement provisions of 2402.4A, “Weight.” The Engineer will not measure bolts, nuts, rivets, washers, and shims used in the fabrication and erection of signs, and will not apply the provisions of 2402.4A, “Weight,” that provide a percent increase in weight. The Engineer will measure structural steel – panel mounting post by the pound, including providing and erecting panel mounting posts. The Engineer will base the computed weight on the quantity tables in the contract. FF Sign The Engineer will measure sign by square foot based on the nominal dimensions of the sign panels. Sign panels are considered rectangular for the purpose of measurement except that the Engineer will measure triangular shaped sign panels as the actual area of the triangle. The Engineer will not make deductions for rounded corners. Sign includes new sign panels, new sign structure, new stringers, and new mounting hardware. GG Sign Panel The Engineer will measure sign panel by square foot based on the nominal dimensions of the sign panel. Sign panel is considered rectangular for the purpose of measurement except that the Engineer will measure a triangular shaped sign panel as the actual area of the triangle. The Engineer will not make deductions for rounded corners. Sign panel includes new sign panel, new stringers, and new mounting hardware. HH Sign Panel Overlay The Engineer will measure sign panel overlay by the square foot based on the nominal dimensions of the sign panel overlay. Sign panel overlays are considered rectangular for the purpose of measurement. The Engineer will not make deductions for rounded corners. Sign panel overlay includes

removing any existing sign panel overlays, removing existing extruded panel sections (if needed), sawing existing panel sections (if needed), sawing panel mounting posts (if needed), new mounting hardware, and providing and attaching new sign panel overlay. II Extruded Panel The Engineer will measure extruded panel by square foot, including new extruded panels bolted together or new extruded panels bolted to existing extruded panels to form an extruded sign panel and attached to the sign structure with new mounting hardware.

2564.5BASIS OF PAYMENT

The Department will pay for traffic signs and devices at the Contract Unit Price per unit of measure. Removal and replacement of existing guardrail for the convenience of the Contractor is included in the Pay Item. Replacement of topsoil, sodding, and seeding for sign installation or removal Work is included in the Pay Item. Disposal of excess excavated Materials from sign installation Work is included in the Pay Item. The Department will pay for traffic signs and devices on the basis of the following schedule: Item No. Item Unit

2564.502 Median Barrier Footing each

2 Sign Support ___ each

2 Modify Post each

2 Install Delineator each

2 Install Marker each

2 Install Reference Location Sign each

2 Install Sign Panel Type ___ each

2 Install Sign Type ___ each

2 Overhead Sign Identification Plate each

2 Extend Walkway Support each

2 Friction Fuse each

2 Keeper Plate each

2 Delineator each

2 Bridge Number Marker each

2 Infiltration Area Marker each

2 Reference Location Sign each

2 Object Marker each

7 Concrete Footings (Type ___) cubic yard

8 Structural Steel pound

2564.510 Overhead Sign Structure Repair hour

8 Sign Panels Type ___ square foot

8 Sign Panel Overlay Type ___ square foot