M shapes

M12.5X11.6 M318X17.3

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 = 3.5d = 12.5tf = 0.211tf = 0.211tw = 0.155tw = 0.155
Cross-section, to scaledimensions in inches

Dimensions

Depthd
12.5in
Flange widthbf
3.5in
Web thicknesstw
0.155in
Flange thicknesstf
0.211in
Distance k (design)kdes
0.563in
Distance k (detailing)kdet
0.5625in
Distance k1k1
0.375in
Web clear depthT
11.38in
Distance between flange centroidsho
12.3in

Mass and area

Mass per lengthm
11.6lb/ft
Cross-sectional areaA
3.4in²

Strong axis x–x

Moment of inertiaIx
80.3in⁴
Elastic section modulusSx
12.8in³
Plastic section modulusZx
15in³
Radius of gyrationrx
4.86in

Weak axis y–y

Moment of inertiaIy
1.51in⁴
Elastic section modulusSy
0.864in³
Plastic section modulusZy
1.37in³
Radius of gyrationry
0.667in

Torsion and stability

Torsional constantJ
0.0414in⁴
Warping constantCw
57.1in⁶
Effective radius of gyrationrts
0.852in

Slenderness ratios

Flange slendernessbf/2tf
8.29
Web slendernessh/tw
74.8

Equivalents in other standards