Cross-Section Characteristics

The following table provides an overview of all Cross-section Characteristics calculated by SCIA Engineer:

Property	Description
A	Area
Ay	Shear Area in principal y-direction
Az	Shear Area in principal z-direction
AL	Circumference per unit length
AD	Drying Surface per unit length
cYUCS	Centroid coordinate in Y-direction of Input axis system
cZUCS	Centroid coordinate in Z-direction of Input axis system
IYLCS	Second moment of area about the YLCS axis
IZLCS	Second moment of area about the ZLCS axis
IYZLCS	Product moment of area in the LCS system
α	Rotation Angle of the principal axis system
Iy	Second moment of area about the principal y-axis
Iz	Second moment of area about the principal z-axis
iy	Radius of gyration about the principal y-axis
iz	Radius of gyration about the principal z-axis
Wely	Elastic section modulus about the principal y-axis
Welz	Elastic section modulus about the principal z-axis
Wply	Plastic section modulus about the principal y-axis
Wplz	Plastic section modulus about the principal z-axis
Mply+	Plastic moment about the principal y-axis for a positive My moment
Mply-	Plastic moment about the principal y-axis for a negative My moment
Mplz+	Plastic moment about the principal z-axis for a positive Mz moment
Mplz-	Plastic moment about the principal z-axis for a negative Mz moment
dy	Shear center coordinate in principal y-axis measured from the centroid
dz	Shear center coordinate in principal z-axis measured from the centroid
It	Torsional constant
Iw	Warping constant
βy	Mono-symmetry constant about the principal y-axis
βz	Mono-symmetry constant about the principal z-axis

In addition to these properties in each fibre of the cross-section the following unit stress values are calculated:

Fibre stress	Description
Shear(Vy)	Shear stress in principal y-direction caused by a unit shear force Vy
Shear(Vz)	Shear stress in principal z-direction caused by a unit shear force Vz
Torsion(Mxp)	Primary Torsion stress caused by a unit torsion moment Mxp
Torsion(Mxs)	Secondary Torsion stress caused by a unit torsion moment Mxs
Unit Warping	Standardised unit warping ordinate
Warping(Mw)	Normal stress caused by a unit bimoment Mw

In the subsequent chapters the calculation of these different characteristics is detailed.

The Cross-section provides the calculation of the unit stress values for Torsion. The split of the Torsion moment Mx into Primary Torsion Mxp and Secondary Torsion Mxs is handled by the respective Checks. See also "Decomposition of arbitrary torsion line"