§ 126-641. Standards.

(a)

Generally. All subdivision streets will be reinforced concrete pavement on a compacted stabilized subgrade. Concrete pavement shall be provided with either an integral curb poured with the pavement or a separate curb constructed on top of and doweled to the concrete pavement.

(b)

Grade. Gutter gradients shall be a minimum of one-quarter of one percent. Crown sections shall slope not less than one-eighth-inch per foot. The minimum drop around curb return will be one-tenth of one foot. All gutter grades shall be above the design water surface of ditches and storm sewers. All grade changes with algebraic differences of one percent or more shall be connected with a vertical curve.

(c)

Width. The minimum width back-to-back of curbs of streets and rights-of-way shall be as follows:

	Street Width (feet)	Right-of-Way Width (feet)
Principal arterials and minor arterials	61	80—100
Collector streets	40	60
Local streets	28	50

 

(d)

Pavement design. Pavement design shall conform to the city engineer's specifications.

(e)

Concrete pavement.

(1)

Standards generally. Concrete pavement shall conform to the requirements of Harris County standard specifications and the city engineer's specifications. Concrete pavement shall conform to the minimum standards of the pavement design table, which is as follows:

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Pavement Design Table
Class	Thickness	Longitudinal Steel #4 bars	Transverse Steel #4 bars
Local	6″	20.5″	36″
Collector	7″	18″	36″
Collector in LI or HI zoning district*	8″	16″	30″
Minor arterial	8″	16″	30″
Principal arterial	Specialized design	Specialized design	Specialized design
Major thoroughfare	Specialized design	Specialized design	Specialized design

 

* If trucking volumes are anticipated to exceed 2,500 equivalent single axle loads per week, pavement design shall be by a geotechnical engineer licensed in the state to provide a 25-year minimum pavement design life, as approved by the city engineer.

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(2)

Subgrade. All subgrades for concrete pavement shall be at least six inches in depth and compacted to or meet the requirements of 95 percent standard proctor density. The subgrade shall be lime stabilized when the plasticity index of the subgrade exceeds 19. The rate of application of lime shall be in accordance with the owner's geotechnical report as prepared by or under the supervision of a licensed engineer in the state. Compaction shall be accomplished by the use of approved and acceptable compacting equipment, and testing shall be performed by a testing laboratory as approved by the city engineer.

(f)

Barrier curb and gutter. The barrier curb and combination barrier curb and gutter shall be constructed of reinforced concrete. Barrier curbs are required in the curb radius of street intersections and for all esplanades, islands, stormwater inlets and non-residential streets. Residential streets may be constructed with either barrier or mountable curbs.

(g)

Mountable curbs. Mountable curbs shall be constructed of reinforced concrete and are permitted to be constructed on residential streets unless barrier curbs are required as specified in subsection (f) of this section. The transition between barrier and mountable curbs shall be accomplished in accordance with the standards on file with the city engineer.

(Code 1967, § 27-71; Ord. No. 3655, § 3, 7-28-83; Ord. No. 7904, § 1, 2-27-97; Ord. No. 8296, § 1, 5-28-98; Ord. No. 8852, § 1, 3-9-00; Ord. No. 9053, §§ 2, 3, 12-14-00; Ord. No. 10,770, § 1, 12-13-07; Ord. No. 11,866, § 26, 2-23-12)