City of Frisco Engineering Standards

Engineering Standards
A. Landscaping that is located within the median of a thoroughfare shall meet the requirements
shown in Figure 6.1.
B. Refer to Section 2.07 (Thoroughfare Design Requirements) for corner visibility and sight line
triangles with regards to landscaping and other obstructions.
C. A minimum of 4” (or 6” in rock) suitable loam topsoil shall be furnished and installed in the areas
behind the curbs.
D. Only mowed grasses are permitted within 6’ of the existing or future face of curb unless approved
by the Director of Engineering Services and Director of Parks and Recreation.
E. Irrigation shall be provided in accordance with the Irrigation Design Standards (Section 7 of the
Engineering Standards).
F. Median tree spacing shall be 35’ (typical) apart center-to-center of tree trunk generally located in
the center of the ultimate median.
G. Trees shall be planted at least 4’ from the outside edge of a pipeline.
H. The City has final approval for all tree placements.
I. Trees overhanging walks and parking shall have a minimum clear trunk height of 7’. Trees
overhanging public street pavement drive aisles and fire lanes shall have a minimum clear trunk
height of 14’.
J. Trees and planting areas shall not be installed on slopes steeper than 3:1.
K. Landscaping shall be located so that pedestrians can walk along the parkway whether a paved
sidewalk is provided or not.
L. Sod shall be placed to cover the first 4’ behind the curbs of the median area and 2’ behind the
curb along the parkway along all public roadways in accordance with the City Technical
Specifications.
M. Areas not required to be sodded shall be seeded after properly preparing the ground as designated
on the plans and in accordance with City Technical Specifications.
N. Conduit for street lighting and irrigation shall be generally located as shown in Figure 6.2 to
accommodate trees, street lights and irrigation within the roadway median.
Section 6 – Landscaping Design Requirements May 2012 Page 6-3