W shapes (wide flange)

W8X21 W200X31.3

Standard: AISC Shapes Database v16.0Source: AISC (aisc.org) — Shapes Database v16.0 (Excel file)
Values published by AISC, in US customary (original) and SI units.
xybf = 5.27d = 8.28tf = 0.4tf = 0.4tw = 0.25tw = 0.25
Cross-section, to scaledimensions in inches

Dimensions

Depthd
8.28in
Flange widthbf
5.27in
Web thicknesstw
0.25in
Flange thicknesstf
0.4in
Distance k (design)kdes
0.7in
Distance k (detailing)kdet
0.875in
Distance k1k1
0.5625in
Web clear depthT
6.5in
Distance between flange centroidsho
7.88in

Mass and area

Mass per lengthm
21lb/ft
Cross-sectional areaA
6.16in²

Strong axis x–x

Moment of inertiaIx
75.3in⁴
Elastic section modulusSx
18.2in³
Plastic section modulusZx
20.4in³
Radius of gyrationrx
3.49in

Weak axis y–y

Moment of inertiaIy
9.77in⁴
Elastic section modulusSy
3.71in³
Plastic section modulusZy
5.69in³
Radius of gyrationry
1.26in

Torsion and stability

Torsional constantJ
0.282in⁴
Warping constantCw
152in⁶
Effective radius of gyrationrts
1.46in

Slenderness ratios

Flange slendernessbf/2tf
6.59
Web slendernessh/tw
27.5

Equivalents in other standards