S shapes (American standard beams)

S3X7.5 S75X11.2

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 = 2.51d = 3tf = 0.26tf = 0.26tw = 0.349tw = 0.349
Cross-section, to scaledimensions in inches

Dimensions

Depthd
3in
Flange widthbf
2.51in
Web thicknesstw
0.349in
Flange thicknesstf
0.26in
Distance k (design)kdes
0.625in
Distance k (detailing)kdet
0.625in
Web clear depthT
1.75in
Distance between flange centroidsho
2.74in

Mass and area

Mass per lengthm
7.5lb/ft
Cross-sectional areaA
2.2in²

Strong axis x–x

Moment of inertiaIx
2.91in⁴
Elastic section modulusSx
1.94in³
Plastic section modulusZx
2.35in³
Radius of gyrationrx
1.15in

Weak axis y–y

Moment of inertiaIy
0.578in⁴
Elastic section modulusSy
0.461in³
Plastic section modulusZy
0.821in³
Radius of gyrationry
0.513in

Torsion and stability

Torsional constantJ
0.0896in⁴
Warping constantCw
1.08in⁶
Effective radius of gyrationrts
0.638in

Slenderness ratios

Flange slendernessbf/2tf
4.83
Web slendernessh/tw
5.38

Equivalents in other standards