A

 A - less than 100 feet

B

 B - 100 to 174 feet

C

 C - 175 to 194 feet

D

 D - 195 to 199 feet

E

 E - 200 to 259 feet

F

 F - 260 to 289 feet

G

 G - 299 to 300 feet

H

 H - greater than 300 feet

Z

 Z - not applicable