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Thickness of surface layer

Thickness of the upper layer of a multi-layer backfill arrangement. Should be in the range between 0.048 and 0.16 m.

Symbol
$s_{b1}$
Unit
m
Used in
$L_{b4}$
Trench depth of multi-layer backfill [m]
$R_{q13}$
Thermal resistance 13 of multi-layer backfill [K.m/W]
$s_{b3}$
Thickness from object to top of bedding layer [m]