207 LANDSCAPE Street Trees 12 Chapter Franklin Zoning Ordinance Effective January 1, 2023 12.8 Street Trees 12.8.1 Where Required Street trees shall be required along both sides of all streets and internal drives, except undeveloped edges of natural areas and as required in Section 4.9, Scenic Corridor Overlay District. Street trees shall be planted within either tree pits or planting strips. 12.8.2 Tree Pits A. Tree pits shall comply with the following: Minimum Surface Area Minimum Width on One Side Additional Requirements 25 square feet 4 feet Underground tree structural support system not required 9 square feet 3 feet Underground tree structural support system is required B. Tree pits shall be placed adjacent to the back of the curb. C. Tree pits shall include irrigation systems and structural soils or screened backfill to ensure appropriate root growth and drainage. Figure 12.8.2.A Tree Pits Tree Pits 12.8.3 Planting Strips A. Planting strips shall have a minimum width of six feet. B. Planting strips shall be located between the back of the curb and the edge of the sidewalk, unless otherwise approved by the DRT. C. The trunks of street trees shall be a minimum of three feet from the back edge of the street curb at time of planting. D. Where public utilities are located within the planting strip that prevent street trees from being planted in the planting strip, street trees shall be planted four feet from the back edge of sidewalk. Figure 12.8.3.A Planting Strip Planting Strip 12.8.4 Tree Types Street trees shall be large-maturing canopy trees. In areas where overhead utilities prevent the use of canopy trees, understory trees may be substituted. 12.8.5 Spacing A. Canopy trees shall be planted between 35 to 45 feet on-center. Columnar trees shall be planted between 20 to 25 feet oncenter. B. Understory trees shall be planted between 20 to 25 feet on-center.
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