(A) General. All streets and alleys shall be improved solely at the expense of the developer in accordance with the requirements set forth herein. Existing streets that adjoin the development on one side only will be improved to meet the current street standards, and this cost will be shared equally between the city and the developer. Existing streets that join the development on both sides shall be improved at the developer’s expense. The extent of the improvement of existing streets will be determined by the city and the developer during improvement plan approval process.
(B) Pavement structures. All streets and alleys shall be paved across the entire surface width specified in § 154.044(A) of this chapter. The structural composition of the pavement shall conform to the minimum requirements set forth in Table 154.045 of this section. Design requirements for both rigid and flexible pavements are set forth hereinafter.
(1) Flexible pavements. Flexible pavements are to be constructed as multi-layered structures combining hot mix bituminous concrete/bituminous base/crushed stone base/subbase. Each layer of material is to be constructed in lifts not to exceed the maximum lift thickness (compacted) specified in Table 154.045. The minimum width of any single pass for any lift/layer of bituminous mixture shall be ten feet. There are alternate designs for either deep-strength asphalt or bituminous concrete on a crushed stone base/subbase.
(2) Rigid pavements. Rigid pavements are specified as either reinforced or unreinforced portland cement concrete to be constructed either on the earth subgrade or on a crushed stone subbase or underlayment. Alternate designs are shown for two of the seven street classifications. The underlayment is to be one-fourth inch thick fabric, such as “Bidim” or “Petromat” or equal.
(a) 1. Contraction joints are to be provided at the spacings shown in Table 154.045 for each of the various alternates. These transverse joints are to be sawed joints that are one-eighth-inch to one-fourth-inch wide with a depth equal to one-fourth of the pavement thickness. Sawed construction joints are to be sawed within 24 hours of placement on the concrete. All contraction joints are to be doweled with the exception of the alleys and land access residential streets. Dowel sizes and spacing shall comply with the following requirements:
Pavement Thickness | Minimum Dowel Diameter | Maximum Dowel Diameter | Minimum Dowel Spacing |
6 | 5/8 | 12 | 12 |
7 | 3/4 | 15 | 15 |
8 | 1 | 15 | 12 |
2. The dowel units are to be smooth, plain round bars placed at mid-height of the pavement with an expansion cap on one end. The bars, or assemblies, shall be placed so that the bars are parallel to the centerline and to the pavement surface and shall be treated to prevent bonding of the concrete.
(b) Longitudinal joints. Longitudinal joints shall be constructed no closer than eight feet and no farther apart than 15 feet. The longitudinal joints may be either constructions joints or sawed joints. In either case, there shall be transverse #4 reformed tie bars, 30 inches long, spaced at 30-inch centers along all longitudinal joints. This includes the joint between the pavement and curb/gutter if the curb/gutter is not constructed integral with the pavement. As an option to tie bars, either a half-round or trapezoidal performed keyway meeting the following dimensions may be used on longitudinal joints excluding the gutter joint:
Street Classification | Flexible Pavements | Rigid Pavements | ||
Alt. #1 | Alt. #2 | Alt. #1 | Alt. #2 | |
Street Classification | Flexible Pavements | Rigid Pavements | ||
Alt. #1 | Alt. #2 | Alt. #1 | Alt. #2 | |
Collector commercial and industrial | 6 BAM 2-1/2 I-11 Bind. 1-1/2 I-11 Surf. | 8 Cr. St. 4 BAM 1-1/2 I-11 Bind. 1-1/2 I-11 Surf. | 7 SRPCC (40 Dowel Jts.) 4 Cr. St./UL | — |
Collector residential | 4 BAM 2-1/2 I-11 Bind. 2 I-11 Surf. | 8 Cr. St. 3 BAM 1-1/2 I-11 Surf. | 6 SRPCC (40 Dowel Jts.) | 6 PCC 4 Cr. St./UL (15 Dowel Jts.) |
Local commercial and industrial | 4 BAM 2 I-11 Bind. 1-1/2 I-11 Surf. | 8 Cr. St. 3 BAM 2 I-11 Surf. | 6 SRPCC (40 Dowel Jts.) | 6 PCC 4 Cr. St./UL (15 Dowel Jts.) |
Local residential | 5 BAM 2 I-11 Surf. | 8 Cr. St. 2 I-11 Bind. 1-1/2 I-11 Surf. | 6 PCC (15 Plain Jts.) | — |
Marginal land access residential | 4 BAM 2 I-11 Surf. | 8 Cr. St. 1-1/2 I-11 Bind. 1-1/2 I-111 Surf. | 6 PCC (15 Plain Jts.) | — |
Note: Equivalent pavements in addition to those shown above shall be determined by the City Engineer. Should the total pavement thickness exceed eight inches the granular base/subbase shall extend under the curb/gutter. Abbreviations: Cr. St. = Crushed Stone BAM = Bituminous Aggregate Mixture UL = Underlayment PCC = Unreinforced Portland Cement Concrete SRPCC = Standard Reinforced Portland Cement Concrete Maximum lift thicknesses: Crushed Stone = 8 I-11 Binder = 2-1/2 BAM = 6 I-11 Surface = 2 | ||||
Pavement Thickness | Half-Round Diameter | Trapezoidal | ||
Edge Ht. | Depth | Inside Ht. | ||
6 | 2 | 2 | 1 | 1 |
7 | 2 | 2-1/4 | 1 | 1-1/4 |
8 | 2-1/2 | 2-1/2 | 1 | 1-1/2 |
Sawed longitudinal joints shall be sawed within ten days of concrete placement and prior to any traffic or vehicles traveling on the surface. | ||||
(c) Transverse construction joints.
1. Transverse construction joints shall be constructed at the end of each day’s run or at locations where a “cold” joint will occur due to a delay or interruption in placement operations. All transverse construction joints shall be “tied” with #4 reformed bars, 36 inches long, spaced at 12-inch centers.
2. Construction joints must be at least five feet from a contraction joint.
(d) Pavement reinforcement.
1. Pavement reinforcement shall be used in all rigid pavements designated as SRPCC in Table 154.045. Reinforcement shall be welded wire fabric (6 inches × 12 inches) with W 4 wire transversely and W 5.5 wire longitudinally weighing approximately 54 pounds per 100 square feet. The fabric shall be lapped 12 inches on transverse laps and six inches on longitudinal laps. Reinforcement shall be placed on the subgrade and supported by proper chairs and spacers, prior to paving, at the heights specified below:
Pavement Thickness | Depth Below Pavement Surface | |
Minimum | Maximum | |
6 | 2 | 3 |
7 | 2½ | 3½ |
8 | 3 | 4 |
2. Should the Building Inspector and/or city’s Engineer determine that the minimal standards are not adequate for a given condition (such as traffic volume, size of loads, subgrade support, drainage and the like), the required pavement design shall be determined on the basis of current pavement design procedures subject to the approval of the Building Inspector and/or the city’s Engineer.
(C) Curb and gutter.
(1) All streets, except alleys and collector commercial, local commercial, arterial or industrial, shall be constructed with vertical curb and gutter in accordance with the construction methods, materials, dimensions and specifications.
(2) Curb and/or gutter may be constructed either integrally or separately in conjunction with portland cement concrete pavement. If constructed separately, the gutter flag shall be tied to PCC pavement with 30-inch long #4 reinforcing bars spaced at 30-inch centers.
(D) Maintenance responsibility.
(1) Subsequent to completion of street construction by the subdivider, the Building Inspector and/or Administrator shall make a final inspection of all streets to ascertain the acceptability of structural condition, earth slopes, drainage structures and the like. If the inspection indicates no deficient items, the city shall take formal action to accept the completed streets for maintenance.
(2) Should any item need correction or repair, the subdivider will be notified in writing of the deficiency. No streets will be accepted in a subdivision until all streets comply with the city’s requirements to the satisfaction of the Building Inspector and/or Administrator.
(1994 Code, § 154.35) (Ord. 434, passed 4-26-1993)