Symbol Definition
A Cross-sectional area, mm^2
Avl Availability, "*" indicates a section not produced in Canada. "+" indicates availability should be checked with supplier.
B Width of flange or horizontal leg, mm
B1 Width of top flange, mm
B2 Width of bottom flange, mm
BetX Monosymmetry constant, positive when the larger flange is in flexural compression, and negative otherwise, mm. Used for calculating the lateral-torsional buckling moment of monosymmetric beams. (See "Buckling properties of monosymmetric I-beams", Kitipornchai and Trahair, Journal of the Structural Division, ASCE, May 1980)
BT Width-to-thickness ratio of flange, wall or horizontal leg. S16-01 Clause 11.3
BT1 Width-to-thickness ratio of top flange. S16-01 Clause 11.3
BT2 Width-to-thickness ratio of bottom flange. S16-01 Clause 11.3
C Torsion modulus, ratio of applied torque to maximum shear stress at outer face, mm^3
Crt Shear constant, ratio of vertical shear force to maximum shear stress for the strong bending axis, mm^2
Cw Warping constant, mm^6
D Depth of section or height of vertical leg, mm
Dn_i Nominal depth of section (Imperial units), in
Dnom Nominal depth of section, mm
Dsg Section designation
Ds_i Section designation (Imperial units)
DT Depth-to-thickness ratio of wall or vertical leg. See S16-01 Clause 11.3
Grp G40.20 shape size grouping for tensile properties. See G40.20-04 Standard
HW Clear depth-to-thickness ratio of web. See S16-01 Clause 11.3
Ix Moment of inertia about axis XX, mm^4
Ixy Product of inertia, mm^4
Iy Moment of inertia about axis YY, mm^4
J St-Venant torsional constant, mm^4
K Distance between outer face of flange and web-toe of fillet, mm
K1 Distance between middle line of web and flange-toe of fillet, mm
Mass Mass per length, kg/m
Omeg Buckling constant of asymmetric sections. See S16-01 Clause 13.3.2
Prp Property group, "*" indicates the first section in a group with similar properties
Qf Statical moment at point in flange in line with web face, mm^3
Qw Statical moment at mid-depth in web, mm^3
RI Inner corner radius, mm
Rmax Maximum flange-to-web fillet radius (detailing value), mm
Rmin Minimum flange-to-web fillet radius (design value), mm
RO Outer corner radius, mm
Rop Polar radius of gyration about shear centre, mm. See S16-01 Clause 13.3.2
Rx Radius of gyration about axis XX, mm
Rxp Maximum radius of gyration about major principal axis (single angle), mm
Ry Radius of gyration about axis YY, mm
Ryp Minimum radius of gyration about minor principal axis (single angle), mm
Ry0 Radius of gyration about axis YY (0 mm back-to-back), mm
Ry8 Radius of gyration about axis YY (8 mm back-to-back), mm
Ry10 Radius of gyration about axis YY (10 mm back-to-back), mm
Ry12 Radius of gyration about axis YY (12 mm back-to-back), mm
Ry16 Radius of gyration about axis YY (16 mm back-to-back), mm
Ry20 Radius of gyration about axis YY (20 mm back-to-back), mm
SA Surface area per metre, m
Shp Shape identification code
Slp Slope of tapered flange (tangent of angle)
Sx Elastic section modulus about axis XX, mm^3
Sx1 Elastic section modulus about axis XX, top flange, mm^3
Sx2 Elastic section modulus about axis XX, bottom flange, mm^3
Sy Elastic section modulus about axis YY, mm^3
Sw Warping statical moment, mm^4
T Thickness of flange, leg or wall, mm
TanA Tangent of rotation angle between geometric and principal member axes (single angle)
Tdes Design thickness of wall for hollow structural sections. For HSS produced to ASTM A500, Tdes = 0.90 T
T1 Thickness of tapered flange at tip, mm
T2 Thickness of tapered flange at flange-web junction, mm
Use Normal use, 1-column, 2-column or beam, 3-beam, 0-other
W Thickness of web, mm
Wn Normalized unit warping function, mm^2
Wt_i Weight per length (Imperial units), lb/ft
X Horizontal distance between centroid and outside face of web or vertical leg, mm
Xo Distance between centroid and shear centre along geometric axis XX, mm
Xop Distance between centroid and shear centre along major principal axis, mm
Y Vertical distance between centroid and outside face of flange or horizontal leg, mm
Yo Distance between centroid and shear centre along geometric axis YY, mm. For WRF sections, the shear centre is located between the centroid and the larger flange
Yop Distance between centroid and shear centre along minor principal axis, mm
Yt Vertical distance between outside face of top flange and centroid, mm
Zx Plastic modulus about axis XX, mm^3
Zy Plastic modulus about axis YY, mm^3