S shapes (American standard beams)

S8X18.4 S200X27.4

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 = 4d = 8tf = 0.425tf = 0.425tw = 0.271tw = 0.271
Cross-section, to scaledimensions in inches

Dimensions

Depthd
8in
Flange widthbf
4in
Web thicknesstw
0.271in
Flange thicknesstf
0.425in
Distance k (design)kdes
1in
Distance k (detailing)kdet
1in
Web clear depthT
6in
Distance between flange centroidsho
7.58in

Mass and area

Mass per lengthm
18.4lb/ft
Cross-sectional areaA
5.4in²

Strong axis x–x

Moment of inertiaIx
57.5in⁴
Elastic section modulusSx
14.4in³
Plastic section modulusZx
16.5in³
Radius of gyrationrx
3.26in

Weak axis y–y

Moment of inertiaIy
3.69in⁴
Elastic section modulusSy
1.84in³
Plastic section modulusZy
3.18in³
Radius of gyrationry
0.827in

Torsion and stability

Torsional constantJ
0.335in⁴
Warping constantCw
52.9in⁶
Effective radius of gyrationrts
0.985in

Slenderness ratios

Flange slendernessbf/2tf
4.71
Web slendernessh/tw
22.9

Equivalents in other standards