General Regulations
S = 0.0023/A x I x L | |||
|---|---|---|---|
Where | |||
S | is the average slope in percent | ||
I | is the contour interval in feet as established by on-site contour survey by a licensed registered surveyor/engineer | ||
L | is the combined length in contour lines in feet | ||
A | is the area in acres of the parcel being considered | ||
Use/Task | Maintained Footcandles1 | Uniformity (Average: Minimum)2 | ||
|---|---|---|---|---|
Streets, local residential | 0.4 average | 6:1 | ||
Streets, local commercial | 0.9 average | 6:1 | ||
Parking, residential, multifamily | ||||
Low vehicular/pedestrian activity | 0.2 minimum | 4:1 | ||
Medium vehicular/pedestrian activity | 0.6 minimum | 4:1 | ||
Parking, industrial/ commercial/ institutional/ municipal | ||||
High activity, e.g., regional shopping centers/fast-food facilities, major athletic/civic/cultural events | 0.9 minimum | 4:1 | ||
Medium activity, e.g., community shopping centers, office parks, hospitals, commuter lots, cultural/civic/recreational events | 0.6 minimum | 4:1 | ||
Low activity, e.g., neighborhood shopping, industrial employee parking, schools, church parking | 0.2 minimum | 4:1 | ||
Walkways and bikeways | 0.5 average | 5:1 | ||
Building entrances | 5.0 average | — | ||
NOTES: | ||
|---|---|---|
1 | Illumination levels are maintained horizontal footcandles on the task, e.g., pavement or area surface. | |
2 | Uniformity ratios dictate that average illuminance values shall not exceed minimum values by more than the product of the minimum value and the specified ratio; e.g., for commercial parking high activity, the average footcandles shall not be in excess of 3.6 (0.9 x 4). | |
General Regulations
S = 0.0023/A x I x L | |||
|---|---|---|---|
Where | |||
S | is the average slope in percent | ||
I | is the contour interval in feet as established by on-site contour survey by a licensed registered surveyor/engineer | ||
L | is the combined length in contour lines in feet | ||
A | is the area in acres of the parcel being considered | ||
Use/Task | Maintained Footcandles1 | Uniformity (Average: Minimum)2 | ||
|---|---|---|---|---|
Streets, local residential | 0.4 average | 6:1 | ||
Streets, local commercial | 0.9 average | 6:1 | ||
Parking, residential, multifamily | ||||
Low vehicular/pedestrian activity | 0.2 minimum | 4:1 | ||
Medium vehicular/pedestrian activity | 0.6 minimum | 4:1 | ||
Parking, industrial/ commercial/ institutional/ municipal | ||||
High activity, e.g., regional shopping centers/fast-food facilities, major athletic/civic/cultural events | 0.9 minimum | 4:1 | ||
Medium activity, e.g., community shopping centers, office parks, hospitals, commuter lots, cultural/civic/recreational events | 0.6 minimum | 4:1 | ||
Low activity, e.g., neighborhood shopping, industrial employee parking, schools, church parking | 0.2 minimum | 4:1 | ||
Walkways and bikeways | 0.5 average | 5:1 | ||
Building entrances | 5.0 average | — | ||
NOTES: | ||
|---|---|---|
1 | Illumination levels are maintained horizontal footcandles on the task, e.g., pavement or area surface. | |
2 | Uniformity ratios dictate that average illuminance values shall not exceed minimum values by more than the product of the minimum value and the specified ratio; e.g., for commercial parking high activity, the average footcandles shall not be in excess of 3.6 (0.9 x 4). | |