# Inner height

For cables in tunnels, this is the inner height of the tunnel (only applicable for rectangular tunnels).

For cables in troughs, this is the inner height of the trough.

Symbol
$h_t$
Unit
m
Formulae
$\frac{\pi Di_t}{4}$
Related
$Di_t$
Used in
$A_t$
$d_t$
$Di_t$
$Do_t$
$p_{tr}$
$T_{at}$
$T_e$
$\theta_{at,0}$
$U_{ti}$