S shapes (American standard beams)

S12X35 S310X52

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 = 5.08d = 12tf = 0.544tf = 0.544tw = 0.428tw = 0.428
Cross-section, to scaledimensions in inches

Dimensions

Depthd
12in
Flange widthbf
5.08in
Web thicknesstw
0.428in
Flange thicknesstf
0.544in
Distance k (design)kdes
1.19in
Distance k (detailing)kdet
1.188in
Web clear depthT
9.625in
Distance between flange centroidsho
11.5in

Mass and area

Mass per lengthm
35lb/ft
Cross-sectional areaA
10.2in²

Strong axis x–x

Moment of inertiaIx
228in⁴
Elastic section modulusSx
38.1in³
Plastic section modulusZx
44.6in³
Radius of gyrationrx
4.72in

Weak axis y–y

Moment of inertiaIy
9.84in⁴
Elastic section modulusSy
3.88in³
Plastic section modulusZy
6.8in³
Radius of gyrationry
0.98in

Torsion and stability

Torsional constantJ
1.05in⁴
Warping constantCw
323in⁶
Effective radius of gyrationrts
1.22in

Slenderness ratios

Flange slendernessbf/2tf
4.67
Web slendernessh/tw
23.1

Equivalents in other standards