Stability Class

σ_y(m)

σ_z(m)

A-B

$0.32x{\left(1+0.0004x\right)}^{-0.5}$

$0.24x{\left(1+0.0001x\right)}^{0.5}$

C

$0.22x{\left(1+0.0004x\right)}^{-0.5}$

0.2x

D

$0.16x{\left(1+0.0004x\right)}^{-}{}^{0.5}$

$0.14x{\left(1+0.0003x\right)}^{-0.5}$

E-F

$0.11x{\left(1+0.0004x\right)}^{-0.5}$

$0.08x{\left(1+0.0015x\right)}^{-0.5}$