Division 600 — Division 600
Division 600 — Incidental Construction
600.01 General . Unless otherwise specified, all testing of hydraulic cement concrete in
Division 600 — shall be in accordance with the requirements of Subsection 601.02.1.
SECTION 601 - STRUCTURAL CONCRETE
601.01 Description . This work consists of furnishing and placing hydraulic cement
concrete for specified structures in accordan ce with these specificatio ns and in reasonably close conformity with the lines, grades, and dimensions shown on the plans or established by the Engineer. Structural concrete will be divided into two groups. One group will be designated as Structural Concrete. The other group will be designated as Structural Concrete, Minor Structures. Unless otherwise specified in the contract, Structural Concrete, Minor Structures, will include inlets, catch basins, junction boxes, pipe headwalls, and pipe collars, regardless of the concrete quantity re quired for each of these structures; and other small structures containing less than 3.00 cubic yards of concrete each.
601.02 Materials .
601.02.1 General . Materials for structural concrete and their use, care, and handling shall
be in accordance with Subsection 804.02. Sa mpling and testing will be in accordance with TMD-20-04-00-000 or TMD-20-05-00-000, as applicable.
601.02.2 Classification of Concrete . Concrete for this work shall be the class specified
on the plans or in the bid schedule of the cont ract. Classes of concrete are identified in Subsection 804.02.6.
601.02.3 Precast Units . Design standards normally contem plate that structural concrete
will be cast in place. However, the Contractor may request approval from the Engineer to furnish and install precast units in lieu of cast-in-place units. The request shall be accompanied by detailed drawings of the pr ecast units and design data certified by a registered Professional Engineer as to structural and functional adequacy. The foundation for precast units shall be carefu lly shaped to the precise contour and grade of the bottom of the unit before the unit is placed. Precast units which are to be joined to other units shall be designed and manufactured with proper and adequate joints. Joints shall be sealed with a joint material meeting the applicable requirements of Section 707. MDOT Drawing Sheet Nos. PCU-1 and PCU-2 address Department’s approved precast drainage units. The Contractor must make a request to the Project Engineer for approval to use precast units other than the ones show n on Drawing Sheet No . PCU-1 or PCU-2. Precast drainage unit tops are only allowed on units shown on Drawing Sheet No. PCU-1. Cast-In-Place drainage unit tops are required on units shown on Drawing Sheet No. PCU-2. No additional payment will be allowed for precast units approved for use. Pay items and quantities will be as in cast in place in accordance with design standards.