Double angles (2L)

2L4X3X1/2SLBB 2L102X76X12.7SLBB

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.
xy2b + s = 8.425d = 3t = 0.5t = 0.5
Cross-section, to scaledimensions in inches

Dimensions

Depthd
3in
Widthb
4in
Thicknesst
0.5in

Mass and area

Mass per lengthm
22.2lb/ft
Cross-sectional areaA
6.5in²

Strong axis x–x

Moment of inertiaIx
4.79in⁴
Elastic section modulusSx
2.2in³
Plastic section modulusZx
3.99in³
Radius of gyrationrx
0.858in

Weak axis y–y

Moment of inertiaIy
21.3in⁴
Elastic section modulusSy
5.32in³
Plastic section modulusZy
8.58in³
Radius of gyrationry
1.81in

Torsion and stability

Polar radius (shear center)r̄o
2.09in
Flexural constantH
0.925

Centers

Centroidȳ
0.822in
Plastic neutral axisyp
0.406in

Slenderness ratios

Wall slendernessb/t
8

Equivalents in other standards