S shapes (American standard beams)

S18X54.7 S460X81.4

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 = 6d = 18tf = 0.691tf = 0.691tw = 0.461tw = 0.461
Cross-section, to scaledimensions in inches

Dimensions

Depthd
18in
Flange widthbf
6in
Web thicknesstw
0.461in
Flange thicknesstf
0.691in
Distance k (design)kdes
1.5in
Distance k (detailing)kdet
1.5in
Web clear depthT
15in
Distance between flange centroidsho
17.3in

Mass and area

Mass per lengthm
54.7lb/ft
Cross-sectional areaA
16in²

Strong axis x–x

Moment of inertiaIx
801in⁴
Elastic section modulusSx
89in³
Plastic section modulusZx
104in³
Radius of gyrationrx
7.07in

Weak axis y–y

Moment of inertiaIy
20.7in⁴
Elastic section modulusSy
6.91in³
Plastic section modulusZy
12.1in³
Radius of gyrationry
1.14in

Torsion and stability

Torsional constantJ
2.33in⁴
Warping constantCw
1,550in⁶
Effective radius of gyrationrts
1.42in

Slenderness ratios

Flange slendernessbf/2tf
4.34
Web slendernessh/tw
33.2

Equivalents in other standards