When the sidewalk is directly against the back
of the curb and the sidewalk is at least five feet wide, the curb
shall be sloped as shown in Figure 5 of this subsection. This will eliminate the need for depressing
the back edge of the sidewalk. For sidewalks narrower than five feet,
the curb will be sloped and the back edge of the sidewalk will be
depressed (maximum 1Â 1/2 inches) to maintain an eight-percent
maximum grade on the driveway. The longitudinal grade of the sidewalk
shall not exceed two inches per foot. Maximum grade for slant concrete
curb shall be 2% across the sidewalk and grass strip (See Figure 5A).