# Distance to lateral edge of multi-layer backfill

Distance from cable to the side of the backfill area.

All resistances $R_q$ are calculated once for the side with shorter distance to backfill boundary, and once for the other side.

Symbol
$w_{b4}$
Unit
m
Formulae
 $\frac{w_b}{2}+x_{pos}-x_b$ distance to left side of backfill $\frac{w_b}{2}+x_b-x_{pos}$ distance to right side of backfill
Related
$w_b$
$x_b$
$x_{pos}$
Used in
$d_{b3}$
$d_{b4}$
$R_{q11}$
$R_{q12}$
$R_{q13}$
$R_{q21}$
$R_{q31}$
$R_{q32}$