S shapes (American standard beams)

S12X40.8 S310X60.7

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 = 5.25d = 12tf = 0.659tf = 0.659tw = 0.462tw = 0.462
Cross-section, to scaledimensions in inches

Dimensions

Depthd
12in
Flange widthbf
5.25in
Web thicknesstw
0.462in
Flange thicknesstf
0.659in
Distance k (design)kdes
1.44in
Distance k (detailing)kdet
1.438in
Web clear depthT
9.125in
Distance between flange centroidsho
11.3in

Mass and area

Mass per lengthm
40.8lb/ft
Cross-sectional areaA
11.9in²

Strong axis x–x

Moment of inertiaIx
270in⁴
Elastic section modulusSx
45.1in³
Plastic section modulusZx
52.7in³
Radius of gyrationrx
4.76in

Weak axis y–y

Moment of inertiaIy
13.5in⁴
Elastic section modulusSy
5.13in³
Plastic section modulusZy
8.86in³
Radius of gyrationry
1.06in

Torsion and stability

Torsional constantJ
1.69in⁴
Warping constantCw
433in⁶
Effective radius of gyrationrts
1.3in

Slenderness ratios

Flange slendernessbf/2tf
3.98
Web slendernessh/tw
20.6

Equivalents in other standards