Symbol
$D_{\mathrm{f}}$
Unit
mm
Formulae
$D_{\mathrm{1}} - 2 t_{\mathrm{scb}}$common screen / common sheath (type CC)
$D_{\mathrm{1}} + 2 t_{\mathrm{f}} + 2 t_{\mathrm{sc}} + 2 t_{\mathrm{scs}}$separate screen / common sheath (type SC)
$D_{\mathrm{oc}} F_{\mathrm{x}} + 2 t_{\mathrm{f}}$separate screen / separate sheaths (type SS)
Related
$D_{\mathrm{1}}$
$D_{\mathrm{oc}}$
$t_{\mathrm{sc}}$
$t_{\mathrm{scb}}$
$t_{\mathrm{scs}}$
Used in
$A_{\mathrm{f}}$
$G_{\mathrm{1}}$