Slope rounding provides a gentle transition between grade changes in landscape grading. The assembly features an existing or proposed finish surface of pavement, a proposed slope with a maximum 4:1 ratio for turf or 3:1 for planting areas, and an underlying existing subgrade. A minimum two-foot-six-inch transition zone provides a gradual blend into level areas with a one-foot minimum flat section. Grading interfaces must maintain positive drainage and eliminate scalping from mowing in lawn areas.
1' MIN. FLAT 1. EXISTING OR PROPOSED FINISH SURFACE OF PAVEMENT (VARIABLE) 2. PROPOSED SLOPE 3. EXISTING SUBGRADE NOTES A. SLOPE ROUNDING TO PROVIDE A GENTLE TRANSITION BETWEEN SLOPE CHANGES. FINAL GRADES ARE TO BE APPROVED BY THE LANDSCAPE ARCHITECT. B. FOR LAWN AREAS, THE TRANSITION IS TO BE MADE TO ELIMINATE SCALPING FROM MOWING C. MAKE GRADE CHANGES GRADUAL. BLEND SLOPE INTO LEVEL AREAS. CONSTRUCT UNIFORM GRADES BETWEEN SPOT ELEVATIONS OR CONTOURS SHOWN. PROVIDE POSITIVE DRAINAGE AT ALL GRADING INTERFACES WITH EXISTING TERRAIN 1 2 1 TRANSITION ZONE 2'-6" 1' MIN. FLAT TRANSITION ZONE 2'-6" MIN 1" FOR 4:1 WITH 2’-6” TRANSITION ZONE MIN 1" FOR 4:1 WITH 2'-6" TRANSITION ZONE 4:1 MAX TURF 3:1 MAX PLANTING 3
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