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City of Frisco Engineering Standards

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SECTION 331240<br />

POLYETHYLENE ENCASEMENT<br />

PART 1 – GENERAL<br />

1.01 DESCRIPTION<br />

A. All material, labor, equipment, tools and superintendence necessary to furnish and install<br />

polyethylene encasement around metal pipe and fittings in accordance with Public Works<br />

Construction <strong>Standards</strong>, NCTCOG, 4 th Edition, Item 502.8.<br />

1.02 REFERENCES<br />

A. AWWA C105, AWWA Standard for Polyethylene Encasement for Ductile Iron Pipe<br />

Systems.<br />

B. Public Works Construction <strong>Standards</strong>, NCTCOG, 4 th Edition, Item 502.8<br />

PART 2 – PRODUCTS<br />

2.01 MATERIALS<br />

A. Refer to Public Works Construction <strong>Standards</strong>, NCTCOG, 4 th Edition, Item 502.8.1.<br />

B. The polyethylene encasement may be in tube or sheet form and shall have a minimum<br />

thickness <strong>of</strong> 8 mils.<br />

PART 3 – EXECUTION<br />

3.01 INSTALLATION<br />

A. Refer to Public Works Construction <strong>Standards</strong>, NCTCOG, 4 th Edition, Item 502.8.2.<br />

B. The polyethylene seams and overlaps shall be wrapped and held in place by 2” wide plastic<br />

backed adhesive tape with 2 foot wide overlaps.<br />

C. The wrap on the barrel <strong>of</strong> the pipe shall be loose enough to allow the polyethylene<br />

encasement to shift with the soil.<br />

D. The polyethylene encasement shall be installed without breaks, tears or holes.<br />

<strong>City</strong> <strong>of</strong> <strong>Frisco</strong> May 2012<br />

Standard Technical Specification Polyethylene Encasement 331240-1

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