3831 Minnesota 2020 Standard Specifications 983 3821.2 REQUIREMENTS Provide splice vaults listed on Approved/Qualified Products List under “Traffic management systems/ITS.” Emboss “MnDOT Signals” on the cover for traffic control signal Projects . Emboss “MnDOT Lighting” on the cover for lighting Projects . Emboss “MnDOT TMS” on the cover for ITS Projects . Emboss “MnDOT Anti -Icing” on the cover for anti -icing Projects .
3821.3SAMPLING AND TESTING — BLANK
ARM POLES , MAST ARMS , LUMINAIRE POLE EXTENSIONS , AND LUMINAIRES
3831.1SCOPE
Provide mast arm poles in accordance with Standard Plates 8121, 8123, and 8133 and as shown on the Plans for supporting mast arm mounted and pole mounted vehicle and pedestrian signal heads, and supporting luminaires, as part of a traffic control signal system.
3831.2REQUIREMENTS
A Mast Arm Poles Use mast arm poles of the type specified in the Contract including the following:
Use mast arm poles designed and constructed in accordance with AASHTO’s 2015 LRFD Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals. B Transformer Base Use square transformer -type bases with an access hole that provides an opening, as specified in the Contract, on one side of the base. Provide a cover for the access hole with a positive closure and locking mechanism that is an integral part of the d oor. C Mast Arm Use a 3/4 inch half-coupling and plug on the top side of the traffic control signal mast arm at the location specified in the Contract. If specified in the Contract, provide swing -away hinges with the traffic control signal mast arm. Obtain t he Engineer’s approval before installation. Install the swing -away hinges so the traffic control signal mast arm swings away from the Intersection .
984 Minnesota 2020 Standard Specifications C.1 Mast Arm Signal Head Mounts Mount vehicle signal heads on the extended end of traffic control signal mast ar ms using high -strength cast aluminum angle or straight plumbizer mounts and threaded hub and flange adaptors. Only use threaded hub and flange pole adaptors listed on Approved/Qualified Products List under “Signals.” If specified in the Contract, mount vehicle signal heads mid -arm on traffic control signal mast arms using straight plumbizer mounts as specified in this section. Only use straight mount plumbizers listed on Approved/Qualified Products List under “Signals.” Mount vehicle signal heads o n the end of the mast arm using angle mounts as specified in this section. Only use angle mount plumbizers listed on Approved/Qualified Products List under “Signals.” C.2 Two -way Mast Arm Signal Head Mounts Mount two -way vehicle signal heads on the extended en d of traffic control signal mast arms as specified in the Contract, using high -strength cast aluminum, two -way plumbizer mounts. Only use two way mount plumbizers listed on Approved/Qualified Products List under “Signals.” C.3 Vertical Pole Signal Head Mounts Mount vehicle and pedestrian signal heads on the vertical pole using high -strength cast aluminum angle plumbizer mounts and threaded hub and flange adaptors. Only use threaded hub and flange pole adaptors listed on Approved/Qualified Products List under “S ignals.” If specified in the Contract, mount vehicle cluster head (dog house) style signal head assemblies on the vertical pole using angle plumbizer mounts with extended threaded pole adaptors. Only use angle mount plumbizers listed on Approved/Qualified Products List under “Signals.” Only use extended threaded pole adaptors listed on Approved/Qualified Products List under “Signals.” D Luminaire Pole Extension Provide luminaire pole extensions for luminaires atop mast arm pole standards as specified in the Contract and meeting the following:
3832 Minnesota 2020 Standard Specifications 985 D.1 Luminaires Provide LED Roadway Luminaires (40 foot mounting height) in accordance with 3810 , “Luminaires,” and as shown on the Plans. D.2 Luminaire Wire Holder Provide wire holders listed on Approved/Qualified Products List under “Signals.”
3831.3SAMPLING AND TESTING
Submit four complete sets of shop drawings of the mast arm pole standard, anchor rods, in accordance with 2471.3C.1