810 - Permanent Traffic Signs and Supports
GENERAL DESCRIPTION
Roadway signage is a critical safety feature and construction staff should ensure all signage is properly constructed & installed correctly in the proper location. Misplaced or irregular signs can create a critical hazard to traffic.
Modern signs/supports can be quite large and will require close cooperation between all forces on highway construction projects so the roadway is signed properly when opened to traffic.
Any sign that is erected on a section of roadway not immediately applicable to traffic shall be covered in accordance with Standard Specifications for Construction Sections 812.03.D and 922.02.D until the appropriate time for uncovering it. It is essential that signs with conflicting messages not be displayed.
MATERIALS
All materials for installation on permanent signing projects must meet the requirements of the MDOT Sign Support Standards and in accordance with Section 919 of the Standard Specifications for Construction.
Materials incorporated into MDOT signing projects which are not listed on the Qualified Product List must be accounted for by the Engineer who completes and submit a Materials Source list form to initiate appropriate action for basis of acceptance. This form shall be complete and cover all materials which are identified on the plans or in the specifications. The Materials source list and documentations shall be in accordance to the Materials Source Guide and supplemental Manuals.
EQUIPMENT
A large selection of tools, supplies and heavy machinery are necessary for the installation of ground mounted and overhead signs and their supports. Below are a just a few examples of items that may be applicable for construction of permanent signing projects.
Trucks/Machinery:
- Truck mounted Cranes, Augers & Hydraulic Post drivers
- Truck mounted booms
- Light towers (for nighttime installation activities)
- Backhoe
Survey:
- Lasers & Levels (4 foot levels for checking plumb of Posts and/or Uprights) - Stakes, Flagging tape, marking utensils - Upside-down paint (for staking/marking posts) - Survey Rods - Transit levels 3.1.3 Tools: • Concrete finishing tools: Used to mold and shape post foundations after pour • Sawzalls: Used( for cutting off old Wood posts near it’s foundation • Sledgehammers • Torch cutters: Used for cutting off anchor rod/bolts of End supports from concrete bases • Torque wrench, Hydraulic wrench, hand wrench • Torque Drills, Drill bits & Hex Sockets • Air Compressors, Air Hammers • Angle Grinders • Post Hole Concrete core drills & cutters 3.1.4 Measuring Devices: • Measuring Tapes • Measuring Wheels • Carpenters folding ruler: Used for measuring sign dimensions, base plate standoff. • Laser Distance Measuring tool: Used for measuring Clearances and Span Lengths 3.1.5 Miscellaneous: • Nylon straps, slings and hooks • Sand bags • Stencils for Sign Support Structure ID’s on uprights • Spray paint: Used for painting structure numbers to vertical supports/poles of structures. • Calipers: Used for measuring diameter or thickness of smaller structure components such as anchor bolts, base plate connections or component section losses.
Work safety during use of equipment and tools is of the utmost importance in signing projects. The Contractor must agree to provide the labor and supervision machinery, tools, apparatus and other means of construction; do all the work in manner of safety for their crews and the motorist; furnish all necessary resources and take any steps as may be needed to complete project in strict accordance with contract plans and the proposal to the satisfaction of the Department.
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MATERIALS
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CONSTRUCTION
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MEASUREMENT AND PAYMENT
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