W shapes (wide flange)

W21X55 W530X82

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 = 8.22d = 20.8tf = 0.522tf = 0.522tw = 0.375tw = 0.375
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20.8in
Flange widthbf
8.22in
Web thicknesstw
0.375in
Flange thicknesstf
0.522in
Distance k (design)kdes
1.02in
Distance k (detailing)kdet
1.188in
Distance k1k1
0.8125in
Web clear depthT
18.38in
Distance between flange centroidsho
20.3in

Mass and area

Mass per lengthm
55lb/ft
Cross-sectional areaA
16.2in²

Strong axis x–x

Moment of inertiaIx
1,140in⁴
Elastic section modulusSx
110in³
Plastic section modulusZx
126in³
Radius of gyrationrx
8.4in

Weak axis y–y

Moment of inertiaIy
48.4in⁴
Elastic section modulusSy
11.8in³
Plastic section modulusZy
18.4in³
Radius of gyrationry
1.73in

Torsion and stability

Torsional constantJ
1.24in⁴
Warping constantCw
4,980in⁶
Effective radius of gyrationrts
2.11in

Slenderness ratios

Flange slendernessbf/2tf
7.87
Web slendernessh/tw
50

Equivalents in other standards