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ORDINANCE NO. 516
BE IT ORDAINED by the City Council of the City of North Richland Hills,
Texas, that Ordinance No. 351, adopted November 8,1971, adopting Rules,
Regulations, Policies, and Procedures for the City of North Richland Hills
Water and Sewer System, be amended so that the following amendments to the
said Rules, Regulations, Policies and Procedures be and they are hereby
made as follows:
I.
Section 4.3 of the Appendix Section "C", City Standard Construction
Specifications for Water Distribution System on page 63 shall be deleted,
both as originally approved and as amended on October 23, 1972, and the
following shall be substituted therefor:
"4.3 Asbestos Cement Pipe shall conform to AWWA C400-64T as herein
excepted or further clarified. An affidavit of compliance shall be furnished
in accordance with Section 5 of AWWA standard. Pipe class shall be for a
working pressure not less than 200 p.s.i. for 6" pipe and be in standard
10 ft. or 13 ft. lengths. 8" and larger pipe shall be for a working pressure
not less than 150 p.s.i. and be in standard 13 ft. lengths with 10%
permissible shorter random lengths allowed as per AWWA standards.
Asbestos-cement pipe couplings shall include an asbestos-cement sleeve,
of the same composition as the pipe, and two rubber rings. The couplings
shall be machined so as to insure a tight joint with the pipe. The
rubber rings used to seal the joints shall conform to the requirements of
the latest revision of ASTM D 1869."
II.
Sub-section "C, 1 & 2" of Section VI, System Extensions to serve
Subdivison Developments, on pages 26 and 27 shall be deleted, and the
following shall be substituted therefor:
"C. Evaluated Prices
When the City participates in the cost of facilities for oversizing
or for any other reason, separate bid items shall be set up to reflect
the cost to the City when such separate items can be feasibly determined.
In the absence of such specific bid prices, the price shall be determinded
by using a current bid price or city engineer's estimated price. II
III.
Sub-section "C-7" of Section VII, Standard Requirements and Criteria
of Design for System Extensions -- In addition to Sewage System Design and
Construction Standards, on page 32, the following material and specifications
may be used:
IIGravity flow sewer pipe of size twelve (12") inches and smaller
shall be unplasticized polyvinyl chloride (PVC) Plastic Gravity Sewer
Pipe with integral wall bell and spigot joints for the conveyance of
domestic sewage. Pipe and fittings shall meet the strength requirements
of ASTM specification D 3034, SDR 35. (SDR is arrived at by dividing
the pipe o. d. by wall thickness.) Joints for the PVC pipe and fittings
shall be compression rubber gasket joints. The bell shall consist of an
integral wall section stiffened with two PVC retainer rings which securely
lock the solid cross section rubber ring into position. Fittings and
accessories shall be manufactured and furnished by the pipe supplier or
approved equal and have bell and/or spigot configuration identical to that
of the pipe. Minimum pipe stiffness at 5% deflection shall be 46 for all
sizes when calculated in accordance with ASTM D-2412.
Pipe Size
Outside Diameter
Minimum Wall Thickness
411
611
811
1011
12"
4.215" ± 0.007
6.275 ± 0.009
8.400 ± 0.010
1 O. 500 ± 0.013
12.500 ± 0.016
O. 125
O. 180
0.240
0.300
0.360
Deflection of PVC Pipe:
The maximum allowable initial deflection is 10% with a maximum of 50%
of the initial deflection allowable within the first 10 years. 11
PASSED AND APPROVED this 28th day of January, 1974.
ATTEST:
~c4u&~
Anna Lee Caudry, City Secretary
APPROVED AS TO FORM AND LEGALITY:
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