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Distance d of multi-layer backfill

Distance d to calculate the resistance of multi-layer backfill.

Symbol
$d_{b4}$
Unit
m
Formulae
$\sqrt{{s_{b4}}^2+{w_{b4}}^2}$
Related
$s_{b4}$
Thickness from object to bottom of bedding layer [m]
$w_{b4}$
Distance to lateral edge of multi-layer backfill [m]
Used in
$R_{q21}$
Thermal resistance 21 of multi-layer backfill [K.m/W]
$R_{q31}$
Thermal resistance 31 of multi-layer backfill [K.m/W]