(A) Concrete strength requirements.
(1) Concrete curb and gutter. Concrete curb and gutter shall be constructed of a concrete batch design, providing a seven day flexural beam strength of 5-0 p.s.i.
(2) Reinforced concrete pavements and monolithic curb. Concrete pavement and monolithic curb properly and continuously reinforced shall be constructed of a concrete batch design, providing a seven day flexural beam strength of 525 p.s.i.
(B) Pavement thickness requirements.
(1) Residential street and alley construction.
(a) Residential streets and alleys shall be designed and constructed with adequate thickness, based on State Highway Department triaxial design criteria, to provide for unlimited repetitions of 5,000 pound wheel load and a maximum of 7,000 repetitions of 18,000 pound axle load.
(b) A six-inch thickness of 3,000 p.s.i. reinforced concrete pavement shall be deemed to meet or exceed the loading requirements outlined above. The six-inch thickness will be acceptable without performing additional soils investigation of design calculations, except that stabilization of the subgrade will be required if a plasticity index of 15 or more is found.
(2) Collector street and commercial or industrial alley construction. Collector streets shall be designed and constructed with adequate thickness, based on State Highway Department triaxial design criteria, to provide for unlimited repetitions of 8,000 pound wheel load and a minimum of 70,000 repetitions of 18,000 pound axle loads. A six-inch thickness of 3,500 p.s.i. reinforced concrete pavement with a stabilized subbase of not less than six inches shall be deemed to meet or exceed these load requirements, except that stabilization will not be required where subbase material has a plasticity index of less than 12. The six-inch thickness and subbase stabilization will be acceptable without performing additional soils investigation or design calculations.
(C) Paving width requirements.
(1) Residential and collector streets and alleys. The subdivider shall, at his or her own cost and expense, pay for constructing all residential streets and alleys and all collector streets up to 44 feet wide measured between the face of curbs.
(2) Minor and principle arterials.
(a) In areas as shown on the Thoroughfare Plan where no existing road exists the subdivider shall be required to construct a 22-foot wide street section on each side of a designated thoroughfare measured between the face of curbs with eight inches of reinforced concrete pavement (or equivalent) and a stabilized subgrade, if required.
(b) In areas shown on the Thoroughfare Plan where asphalt roadway exists, the developer with a special permit from the City Commission may reconstruct the existing surface and subgrade as subgrade, stabilized with 6% hydrated lime and constructing a three-inch asphalt concrete surface 22 feet wide.
(Ord. 459, passed 12-17-1985)