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| − | ==617.5.1 Maintenance Planning Guidelines for Replacing Concrete Traffic Barriers==
| + | See [[:Category:170 Maintenance Activity Planning Guidelines#R227 Roadway & Bridge Safety Features|Maintenance Planning Guideline for Replacing Concrete Traffic Barriers]] and [[:Category:170 Maintenance Activity Planning Guidelines#R227 Roadway & Bridge Safety Features|Maintenance Planning Guideline for Repairing Concrete Traffic Barriers]]. |
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| − | These Maintenance planning guidelines apply to both [http://epg.modot.mo.gov/files/7/72/232_Major_Highways_Map.pdf major] and minor roads.
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| − | {|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="160px" align="right"
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| − | |'''Code:''' R227
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| − | |}
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| − | '''Definition'''
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| − | The time and expenses incurred for installing and maintaining fences along the roadway, guardrails and end treatments, guardcable and impact attenuator devices for roadside obstacles as well as all costs to maintain concrete traffic barriers, sidewalks and bicycle paths and raised pavement markers.
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| − | '''Purpose'''
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| − | To replace damaged and/or displaced concrete traffic barrier sections.
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| − | '''Scheduling'''
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| − | Replace the first possible normal working day.
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| − | '''Recommended Equipment'''
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| − | :* Boom truck and/or loader
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| − | :* Dump truck or flatbed truck
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| − | :* Air compressor/drill
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| − | :* Traffic Control Equipment, refer to [[616.23 Traffic Control for Field Operations|Traffic Control for Field Operations]].
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| − | '''Recommended Material'''
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| − | :* 10 ft. precast barrier sections
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| − | '''Recommended Procedure'''
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| − | 1. Place traffic control devices as needed.
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| − | 2. Remove damaged sections and straighten, remove or cut off dowel bars.
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| − | 3. Place new barrier and secure by either cable or pins.
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| − | 4. Clean area and load debris.
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| − | 5. Remove traffic control devices.
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| − | '''Safety'''
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| − | Care should be used in handling the heavy barrier sections. Wear all appropriate Personal Protection Equip (PPE). Refer to [http://lnapp1/RI/RIManual.NSF/SHToC?OpenView Safety Policies, Rules & Regulations-Employee Handbook] .
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| − | '''Other Considerations'''
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| − | None.
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| − | '''Reference'''
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| − | [http://www.modot.mo.gov/business/standards_and_specs/Sec0617.pdf Sec 617]
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| − | | |
| − | ==617.5.2 Maintenance Planning Guidelines for Repairing Concrete Traffic Barriers==
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| − | | |
| − | These Maintenance planning guidelines apply to both [http://epg.modot.mo.gov/files/7/72/232_Major_Highways_Map.pdf major] and minor roads.
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| − | {|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="160px" align="right"
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| − | |-
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| − | |'''Code:''' R227
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| − | |}
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| − | | |
| − | '''Definition'''
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| − | The time and expenses incurred for installing and maintaining fences along the roadway, guardrails and end treatments, guardcable and impact attenuator devices for roadside obstacles as well as all costs to maintain concrete traffic barriers, sidewalks and bicycle paths and raised pavement markers.
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| − | '''Purpose'''
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| − | To repair cast-in-place concrete traffic barrier.
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| − | | |
| − | '''Scheduling'''
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| − | Minor damaged areas may be scheduled in groups. Extensively damaged sections should be repaired the first normal working day with temperatures above 40oF.
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| − | | |
| − | '''Recommended Equipment'''
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| − | :* Boom truck and/or loader
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| − | :* Dump truck
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| − | :* Air compressor/drill
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| − | :* Concrete mobile
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| − | :* Concrete mixer
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| − | :* Concrete saw
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| − | :* Chop saw
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| − | :* Cutting torch
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| − | :* Traffic Control Equipment, as needed.
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| − | '''Recommended Material'''
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| − | :* Paraffin oil (paraffin base)
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| − | :* Bonding compound
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| − | :* Cement, sand, rock, water
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| − | :* Curing compound
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| − | :* Concrete accelerator
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| − | :* Ready-mix concrete
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| − | '''Recommended Procedure'''
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| − | 1. Place traffic control devices as needed.
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| − | 2. Clean broken concrete surface or use concrete saw to square up the broken area.
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| − | 3. Replace damaged rebar.
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| − | 4. Oil and set forms.
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| − | 5. Apply bonding compound to existing surface of old concrete.
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| − | 6. Mix and place 7-sack mix of concrete. Do not use Duracal.
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| − | 7. Finish and apply curing compound.
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| − | 8. Clean work area.
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| − | 9. Remove traffic control devices.
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| − | 10. Remove forms after 4 days or when desired strength is reached.
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| − | '''Safety'''
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| − | Watch for traffic in adjacent lanes. Wear all appropriate Personal Protection Equip (PPE). Refer to [http://lnapp1/RI/RIManual.NSF/SHToC?OpenView Safety Policies, Rules & Regulations-Employee Handbook].
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| − | '''Other Considerations'''
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| − | Replace any damaged or missing traffic control devices.
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| − | '''Reference'''
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| − | [http://www.modot.mo.gov/business/standards_and_specs/Sec0617.pdf Sec 617]
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| | + | Index of all [[:Category:170 Maintenance Activity Planning Guidelines#Index of Printable Planning Guides|Maintenance Planning Guidelines]]. |
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| | [[Category:617 Traffic Barrier]] | | [[Category:617 Traffic Barrier]] |
