The minimum acceptable standards for sidewalks constructed as required by this subchapter shall be as follows:
(A) Width: four feet.
(B) Length: it shall be placed along the entire length of developed street frontage on both open ditch and curb and gutter sections.
(C) Reinforcing:
(1) Material: open hearth new billet steel.
(2) Yield strength: 60,000 pounds per square inch minimum.
(3) Splices: 24 bar diameters.
(4) Bar size and spacing: No. 3 bars at 18-inch centers, each way.
(5) Bar support: metal or plastic “chairs” shall be used to hold bars in position during placement of concrete.
(D) Concrete mixture:
(1) Flexural strength: 650 pounds per square inch minimum modulus of rupture at 28 days (American Society of Testing and Materials, C-78, 3d point loading).
(2) Slump: four inches maximum.
(3) Cement factor: five bags per cubic yard, minimum.
(E) Cement: Type I (normal) Portland cement, or with engineer’s approval, Type III (high early strength).
(F) Aggregate: course and fine aggregate shall meet the requirements of State Highway Department Standard Specification Item 360 for concrete pavement.
(G) Jointing:
(1) Depth of contraction joints: one-fourth of slab thickness.
(2) Transverse spacing: 20 feet.
(3) Expansion joints: at intersections.
(4) Wood joints: Sound Heart Redwood.
(5) Joint seal: ASTM 0920, Type S, Grade P or NS.
(H) Curing: curing method shall retain at least 97% of moisture at 24 hours, at least 95% at three days and at least 91% at seven days. American Society of Testing and Materials Procedure C-5.
(I) Tests: flexural strength, three molds per 200 linear feet
(J) Placement: concrete shall not be placed on frozen subgrade; when air temperature is 38°F or below; when air temperature is below 42°F declining; when finishing cannot be completed during natural daylight.
(K) ADA requirements: at the junction of the sidewalk with each driveway and street, the sidewalk must be transitioned to meet any requirements of the Americans With Disabilities Act (ADA).
(Ord. 103-01, passed 5-15-01)