List of symbols

Symbol	Name of the symbol	Unit
$ $	nominal length per tonne	$\mathrm{m}$
$A$	cross-sectional area	$\mathrm{cm^2}$
$A_s$	superficial area per metre length	$\mathrm{m^2/m}$
$B$	specified side dimension $ B $	$\mathrm{mm}$
$C_t$	torsional modulus constant	$\mathrm{cm^3}$
$D$	specified outside diameter	$\mathrm{mm}$
$H$	specified side dimension $ H $	$\mathrm{mm}$
$I$	second moment of area	$\mathrm{cm^4}$
$I_t$	torsional inertia constant	$\mathrm{cm^4}$
$I_{yy}$	second moment of area $ I_{yy} $	$\mathrm{cm^4}$
$I_{zz}$	second moment of area $ I_{zz} $	$\mathrm{cm^4}$
$M$	mass per unit length	$\mathrm{kg/m}$
$T$	specified thickness	$\mathrm{mm}$
$W_{elyy}$	elastic section modulus $ W_{elyy} $	$\mathrm{cm^3}$
$W_{elzz}$	elastic section modulus $ W_{elzz} $	$\mathrm{cm^3}$
$W_{el}$	elastic section modulus	$\mathrm{cm^3}$
$W_{plyy}$	plastic section modulus $ W_{plyy} $	$\mathrm{cm^3}$
$W_{plzz}$	plastic section modulus $ W_{plzz} $	$\mathrm{cm^3}$
$W_{pl}$	plastic section modulus	$\mathrm{cm^3}$
$i$	radius of gyration	$\mathrm{cm}$
$i_{yy}$	radius of gyration $ i_{yy} $	$\mathrm{cm}$
$i_{zz}$	radius of gyration $ i_{zz} $	$\mathrm{cm}$