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arras 7.3.E. - Page 17 <br /> be done by using fully-restrained pipe that can reliably <br /> stretch (yield) 1%; or have sufficient flexible joints to <br /> absorb the equivalent movement. <br /> b. Submit seismic design calculations to document the <br /> design and installation of pipes 16-inches in diameter <br /> (nominal) and larger, and of critical pipes regardless <br /> of size as determined by the City Engineer. The <br /> design procedure may follow guidelines in ALA <br /> (2005). <br /> c. Detailed seismic design calculations are optional for <br /> the remainder pipe sizes and classifications. Chart <br /> Method (ALA 2005) — Design Approach for Pipe <br /> Category C (Restrained Joints) - may be used for <br /> these pipes instead. <br /> d. Acceptable alternatives to meet this 1 percent strain <br /> are: <br /> Fully restrained High Density Polyethylene <br /> (HDPE) pipe with full penetration welds. <br /> ii. Or approved equals. <br /> e. All pipes to be provided with suitable corrosion <br /> protection. <br /> f. All designs to meet AVWVA requirements for all other <br /> loadings. <br /> g. Service laterals, blow offs, air and vacuum release <br /> and other appurtenances will be installed to resist the <br /> corresponding seismic loads, or installed in manner <br /> so that can be isolated (valved out) within 3 feet (1 <br /> meter) of the main. <br /> h. Alternative designs meeting the intent of ALA (2005) <br /> and the City Standards may be submitted. <br /> PART VII. WATER SYSTEM DESIGN CRITERIA <br /> Petrolatum wax tape system requirements for corrosion protection <br /> was added. <br /> New Paragrap <br /> PART XII. ATTACHMENTS <br /> Attachment T WATER SERVICE AREAS REQUIRING SEISMIC- <br /> DESIGNED WATER PIPES (NEW ATTACHMENT) <br />