Sidewalks within the confines of the right-of-way shall be of portland cement concrete, of monolithic construction, located a variable distance back of the curb and shall have a width of four feet unless a different width shall be provided by Council ordering sidewalk construction, and shall be constructed as hereinafter set forth. Unless Council has specified the location of sidewalks in its legislation ordering their construction, Council may authorize the construction of sidewalks more than five feet from the curb, but not nearer the property line than one foot, upon determination that such location will not detract from the utility or appearance of such sidewalk, or be objectionable in other respects.
(A) Thickness. All concrete walks shall have a minimum thickness of four inches except within the limits of driveways where the minimum thickness shall be six inches.
(B) Grade. Sidewalks shall be graded in conformance with the standard drawings on file with the Municipal Engineer. The slope may be varied as directed by the Municipal Engineer if necessary to conform to existing structures or grades.
(C) Expansion joints. Expansion joints one-half inch thick of suitable asphaltic felt or joint materials shall be provided in all instances where sidewalk meets curb, structures, poles, boxes or where joining existing walks or concrete structures and at intervals of approximately 16 feet across walks.
(D) Preparation of subgrade. The subgrade shall be prepared per Item 204, Subgrade Compaction and Proof Rolling / Test Rolling, in the City of Columbus Construction and Material Specifications.
(E) Structures encountered. The contractor shall adjust main line or hydrant valve boxes, water or gas service boxes and manholes in the area of the walks to conform to the finished grade.
(F) Aggregate base. Four inches of compacted aggregate base material shall be placed under sidewalks. The material shall conform to Item 304, Aggregate Base, in the City of Columbus, Construction and Material Specifications, or Number 57 stone.
(G) Forms. Forms for concrete sidewalk shall be of wood not less than two inches nominal thickness or of steel of equal rigidity. Flexible strips shall be used on curves. The forms shall be set true to line and grade and be securely staked and held.
(H) Material. Concrete for sidewalks shall be concrete as described under “Item 608, Walks, Curb Ramps, and Steps” in the City of Columbus, Construction and Material Specifications.
(I) Placing and finishing. The subgrade shall be adequately moistened just before the concrete is placed. The concrete shall be deposited and compacted in a single layer. It shall be struck off with a template and smoothed with a float to produce a sandy texture. The edges shall be rounded to ¼ inch radius. The surface of the sidewalk shall be divided into blocks by the use of a grooving tool. The grooves shall be spaced equally at four-foot intervals to divide the walk into square blocks. Additional grooves shall be placed over roof drains, at changes in walk thickness, and at other places as directed by the Municipal Engineer. A true expansion joint extending through the entire thickness and filled with expansion joint material s hall be placed at every fourth joint or at intervals of approximately every 16 feet.
(J) Curing and protection. After finishing, the concrete shall be sealed by spraying thereon a membrane curing material in such a manner as to provide a continuous, uniform water-impermeable film without marring the surface of the concrete. A minimum of one gallon of material shall be used per 200 square feet of surface treated. The curing material shall be of such a nature that it is distinctly visible for at least four hours after application but shall produce no permanent discoloration of the concrete. Sidewalks shall not be laid on frozen ground or at a time when freezing temperatures prevail. The contractor shall protect all concrete placed at such times as freezing temperature may be encountered.
(K) Clean-up. As the walk is completed and forms removed the contractor shall immediately backfill the excavation, remove all surplus material and leave the walk and sod strip entirely free from any objects or material that may endanger the public to the satisfaction of the Municipal Engineer.
(L) Roof drain replacement. Existing roof drains passing through the sidewalk area shall be protected when they are at such a grade that the top of the pipe barrel is at least three inches below the top of the sidewalk or finished grade of the sod strip. Drains having less than three-inch cover shall be lowered or replaced for such length as necessary to get cover and to meet the existing pipe grade in the lawn. Pipe used for replacement shall be four-inch nominal diameter standard strength vitrified clay pipe; “D” quality asbestos cement pipe; or “C” quality rigid plastic pipe or standard strength cast iron soil pipe. In all cases the joints between sections shall be sealed by method appropriate for the pipe being used. Where the replacement pipe is of different type from the existing pipe the joint between the two shall be made watertight and mechanically secure. If the replacement pipe is carried through the curb, the curb opening shall be cleaned out and mortared up in a manner satisfactory to the Municipal Engineer after the replacement pipe is installed.
('80 Code, § 1317.06) (Ord. 7-75, passed 2-17-75; Am. Ord. 24-07, passed 5-21-07) Penalty, see § 150.999