Diameter over 1st armour bedding

Symbol
$D_{ab_{1}}$
Unit
mm
Formulae
$D_{shj} F_{x} + 2 t_{ab_{1}} + 2 t_{f}$Multi-core cables with separate screen/sheath
$D_{sh} + 2 t_{ab_{1}}$otherwise
Related
$D_{sh}$
Used in
$A_{ab_{1}}$