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City of Frisco Engineering Standards

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<strong>Engineering</strong> <strong>Standards</strong><br />

Version 6/19/12<br />

Q. Trees shall be irrigated with one bubbler each with a separate valve<br />

R. Irrigation heads shall comply with the following:<br />

1. Multi-stream multi-trajectory rotor heads<br />

2. Low precipitation with 0.7DU or greater<br />

3. Selected and spaced for maximum distribution and uniformity.<br />

4. Matched precipitation rates on each zone.<br />

5. Have spring retracted pop-up operation.<br />

6. Installed on green 6” cut <strong>of</strong>f riser.<br />

7. Adjust heads to ensure uniform coverage and to prevent overspray.<br />

8. Shall be installed a minimum <strong>of</strong> 6” from back <strong>of</strong> curb and in accordance with current TCEQ<br />

regulations.<br />

9. Connect all MSMTR or equivalent heads with bull head connection.<br />

S. Feeder laterals and mainlines shall be located as close to the center <strong>of</strong> median as feasible.<br />

T. Refer to the Approved Materials List for Median Right-<strong>of</strong>-Way Irrigation Equipment<br />

7.03 Additional Irrigation Design Requirements within Roadway<br />

A. Two 4” PVC conduits shall run from 2’ behind the back <strong>of</strong> curb from median nose to median<br />

nose, extending beyond the limits <strong>of</strong> hardscape (concrete median nose, pavers, etc). Two 4” PVC<br />

conduits shall also run from median to parkway as needed to provide water and power to the<br />

median. The end <strong>of</strong> the conduits shall be clearly marked with a sawcut.<br />

B. No swing pipe or flex pipe allowed in medians.<br />

C. Wiring shall include six 14 gauge (minimum) wires.<br />

D. Refer to Section 6.02, Landscape Requirements within the Median for additional information on<br />

location <strong>of</strong> conduits for street lighting and irrigation in relation to tree planting.<br />

Section 7 – Irrigation Design Requirements May 2012 Page 7-3

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