City of Frisco Engineering Standards

Engineering Standards
Q. Trees shall be irrigated with one bubbler each with a separate valve
R. Irrigation heads shall comply with the following:
1. Multi-stream multi-trajectory rotor heads
2. Low precipitation with 0.7DU or greater
3. Selected and spaced for maximum distribution and uniformity.
4. Matched precipitation rates on each zone.
5. Have spring retracted pop-up operation.
6. Installed on green 6” cut off riser.
7. Adjust heads to ensure uniform coverage and to prevent overspray.
8. Shall be installed a minimum of 6” from back of curb and in accordance with current TCEQ
regulations.
9. Connect all MSMTR or equivalent heads with bull head connection.
S. Feeder laterals and mainlines shall be located as close to the center of median as feasible.
T. Refer to the Approved Materials List for Median Right-of-Way Irrigation Equipment
7.03 Additional Irrigation Design Requirements within Roadway
A. Two 4” PVC conduits shall run from 2’ behind the back of curb from median nose to median
nose, extending beyond the limits of hardscape (concrete median nose, pavers, etc). Two 4” PVC
conduits shall also run from median to parkway as needed to provide water and power to the
median. The end of the conduits shall be clearly marked with a sawcut.
B. No swing pipe or flex pipe allowed in medians.
C. Wiring shall include six 14 gauge (minimum) wires.
D. Refer to Section 6.02, Landscape Requirements within the Median for additional information on
location of conduits for street lighting and irrigation in relation to tree planting.
Section 7 – Irrigation Design Requirements May 2012 Page 7-3