7-159 Section 714. Temporary Structures a nd Approaches
714.01 Description
This work consists of designing, constructing, maintaining, removing, and disposing of temporary structures an d approaches.
714.02 Materials
None specified.
714.03 Construction
A.Location . The Engineer will direct clearing of obstructions to vision along temporary roadways . Locate construction materials, equipment, and buildings to prevent interference with clear vision.
B.Construction . Design, construct, and maintain temporary structures to carry legal loads allowed on highways in accordance with Michigan state statutes and AASHTO Standard Specifications for Highway Bridges , 17th edition. A Professional Engineer licensed in the State of Michigan must seal the design . Submit the design to the Engineer for approval. Fabricate structural steel in accordance with section 707, except that shop cleaning and coating or galvanizing are not required. Fabricate structural prestressed concrete in accordance with section 708. Construct deck surfaces within a tolerance of ¼ inch, as measured with a 10-foot straightedge. Construct deck surfaces of concrete, asphalt, or timber . Level high spots or depressions using methods approved by the Engineer. Provide two -way structures unless otherwise shown on the plans or directed by the E ngineer.
1.One-Way Structure. Provide a clear roadway at least 12 feet wide, measured between inside curb faces at right angles to the roadway centerline. Provide at least 13 feet between bridge railing inside faces.
2.Two-Way Structure. Provide a clear roadwa y at least 20 feet wide, measured between inside curb faces at right angles to the roadway centerline. Provide at least 21 feet between bridge railing inside faces. MDOT Standard Specifications for Construction Section 714 7-160 C. Maintenance. Maintain temporary structures and approaches in accordance with subsection 104.07 until contract completion or new structures are opened to traffic. Protect traffic and the work in accordance with section 812. Maintain temporary structures and approaches, including replacement for partial or complete failures. The Department reserves the right to provide labor, materials, and supervision to restore movement of traffic if the Contractor delays or makes inadequate progress in the repair or replacement of a temporary structure or approach, at no additional cost to the Department.
D.Remova l and Disposal . Take ownership of material from temporary structures and remove from the project before contract completion. Dispose of embankment and surface of temporary approaches in accordance with subsection 205.03.P, except if the work requires this material to be incorporate d as shown on the plans or as directed by the Engineer . Remove pilings or other supports in accordance with subsection
706.03 O.
714.04 Measurement and Payment
Pay Item Pay Unit Structures, Temp (Structure Identification) ....................................... Lump Sum Structures, Temp, Rem (Structure Identification) ............................. Lump Sum The Engineer will measure Structures, Temp by grouping material included in the structure and measuring as a unit . The unit price for Structures, Temp includes the cost of designing, constr ucting, and maintaining temporary structures. The unit price for Structures, Temp, Rem includes the cost of removing and disposing of temporary structures. The Department will pay for approaches at the unit prices for applicable pay items . Payment for appr oaches includes constructing and maintaining approaches. The Engineer will measure, and the Department will pay for , removing and disposing of temporary approaches as Obliterating Roadway in accordance with subsection 207.04.
Source: Michigan Standard Specifications for Construction, 2020 Edition. Pages 523–524 of 1,146.