AISC Double Angles & Section Properties

AISC 2L shapes are back-to-back double-angle assemblies used for built-up members, braces and truss chords.

Search Sections Compare Sections Open in Beam Calculator Export Excel or PDF Open 2D Structural Analysis

Steel Section Finder

Search or browse standard steel sections.

Showing AISC · Double Angles · Imperial

AISC Shapes Database v16.0 · 2,299 sections

Searches every available library and shape family. Leave the field empty to browse the filters below.

Showing the most relevant 75 sections.

AISC 2L dimensions and section properties in imperial units
Designation Weight (lb/ft) Depth, d (in) Width (in) Area (in²) Ix (in⁴) Iy (in⁴) Sx (in³)
2L12x12x1 156 12 12 46 630 1150 73
2L12x12x1x1-1/2 156 12 12 46 630 1410 73
2L12x12x1x3/4 156 12 12 46 630 1270 73
2L12x12x1-1/8 174 12 12 51.6 700 1300 81.4
2L12x12x1-1/8x1-1/2 174 12 12 51.6 700 1590 81.4
2L12x12x1-1/8x3/4 174 12 12 51.6 700 1440 81.4
2L12x12x1-1/4 193 12 12 56.8 762 1440 89.2
2L12x12x1-1/4x1-1/2 193 12 12 56.8 762 1760 89.2
2L12x12x1-1/4x3/4 193 12 12 56.8 762 1590 89.2
2L12x12x1-3/8 210 12 12 62.2 826 1590 97.2
2L12x12x1-3/8x1-1/2 210 12 12 62.2 826 1950 97.2
2L12x12x1-3/8x3/4 210 12 12 62.2 826 1760 97.2
2L10x10x3/4 98.2 10 10 29 278 499 38.4
2L10x10x3/4x1-1/2 98.2 10 10 29 278 635 38.4
2L10x10x3/4x3/4 98.2 10 10 29 278 563 38.4
2L10x10x7/8 114 10 10 33.6 316 579 43.8
2L10x10x7/8x1-1/2 114 10 10 33.6 316 739 43.8
2L10x10x7/8x3/4 114 10 10 33.6 316 655 43.8
2L10x10x1 129 10 10 38 354 665 49.6
2L10x10x1x1-1/2 129 10 10 38 354 849 49.6
2L10x10x1x3/4 129 10 10 38 354 752 49.6
2L10x10x1-1/8 145 10 10 42.6 392 750 55.2
2L10x10x1-1/8x1-1/2 145 10 10 42.6 392 960 55.2
2L10x10x1-1/8x3/4 145 10 10 42.6 392 849 55.2
2L10x10x1-1/4 160 10 10 46.8 426 833 60.4
2L10x10x1-1/4x1-1/2 160 10 10 46.8 426 1070 60.4
2L10x10x1-1/4x3/4 160 10 10 46.8 426 943 60.4
2L10x10x1-3/8 174 10 10 51.2 462 923 66
2L10x10x1-3/8x1-1/2 174 10 10 51.2 462 1180 66
2L10x10x1-3/8x3/4 174 10 10 51.2 462 1050 66
2L8x4x7/16LLBB 34.4 8 4 10.2 68.4 19.1 13.2
2L8x4x7/16x3/4LLBB 34.4 8 4 10.2 68.4 26.8 13.2
2L8x4x7/16x3/8LLBB 34.4 8 4 10.2 68.4 22.6 13.2
2L8x4x1/2LLBB 39.2 8 4 11.6 77.2 22.1 15
2L8x4x1/2x3/4LLBB 39.2 8 4 11.6 77.2 30.8 15
2L8x4x1/2x3/8LLBB 39.2 8 4 11.6 77.2 26.1 15
2L8x6x7/16LLBB 40.4 8 6 12 78.6 63.5 14.1
2L8x6x7/16x3/4LLBB 40.4 8 6 12 78.6 78 14.1
2L8x6x7/16x3/8LLBB 40.4 8 6 12 78.6 70.3 14.1
2L8x4x9/16LLBB 43.8 8 4 13 85.8 24.8 16.7
2L8x4x9/16x3/4LLBB 43.8 8 4 13 85.8 35.4 16.7
2L8x4x9/16x3/8LLBB 43.8 8 4 13 85.8 29.6 16.7
2L8x6x1/2LLBB 46 8 6 13.6 88.8 72.6 16
2L8x6x1/2x3/4LLBB 46 8 6 13.6 88.8 89.1 16
2L8x6x1/2x3/8LLBB 46 8 6 13.6 88.8 80.3 16
2L8x4x5/8LLBB 48.4 8 4 14.3 94 27.6 18.4
2L8x4x5/8x3/4LLBB 48.4 8 4 14.3 94 39.4 18.4
2L8x4x5/8x3/8LLBB 48.4 8 4 14.3 94 33 18.4
2L8x6x9/16LLBB 51.4 8 6 15.2 98.8 81.8 17.9
2L8x6x9/16x3/4LLBB 51.4 8 6 15.2 98.8 101 17.9
2L8x6x9/16x3/8LLBB 51.4 8 6 15.2 98.8 90.5 17.9
2L8x8x1/2 52.8 8 8 15.7 97.6 171 16.7
2L8x8x1/2x3/4 52.8 8 8 15.7 97.6 199 16.7
2L8x8x1/2x3/8 52.8 8 8 15.7 97.6 185 16.7
2L8x6x5/8LLBB 57 8 6 16.8 108 91.2 19.7
2L8x6x5/8x3/4LLBB 57 8 6 16.8 108 113 19.7
2L8x6x5/8x3/8LLBB 57 8 6 16.8 108 101 19.7
2L8x4x3/4LLBB 57.4 8 4 17 110 34.3 21.8
2L8x4x3/4x3/4LLBB 57.4 8 4 17 110 48.6 21.8
2L8x4x3/4x3/8LLBB 57.4 8 4 17 110 40.8 21.8
2L8x8x9/16 59.2 8 8 17.5 108 192 18.7
2L8x8x9/16x3/4 59.2 8 8 17.5 108 223 18.7
2L8x8x9/16x3/8 59.2 8 8 17.5 108 207 18.7
2L8x8x5/8 65.4 8 8 19.4 119 214 20.6
2L8x8x5/8x3/4 65.4 8 8 19.4 119 249 20.6
2L8x8x5/8x3/8 65.4 8 8 19.4 119 231 20.6
2L8x4x7/8LLBB 66.2 8 4 19.6 125 40.6 25
2L8x4x7/8x3/4LLBB 66.2 8 4 19.6 125 58 25
2L8x4x7/8x3/8LLBB 66.2 8 4 19.6 125 48.3 25
2L8x6x3/4LLBB 67.6 8 6 20 127 110 23.4
2L8x6x3/4x3/4LLBB 67.6 8 6 20 127 136 23.4
2L8x6x3/4x3/8LLBB 67.6 8 6 20 127 122 23.4
2L8x4x1LLBB 74.8 8 4 22.2 139 47.3 28
2L8x4x1x3/4LLBB 74.8 8 4 22.2 139 68 28
2L8x4x1x3/8LLBB 74.8 8 4 22.2 139 56.8 28
Previous Page 1 of 9 Next

Family overview

What are AISC Double Angles?

AISC 2L shapes are back-to-back double-angle assemblies used for built-up members, braces and truss chords.

Designations

Understanding Double Angles designations

AISC double-angle designations identify the paired angle size, thickness, clear separation, and LLBB or SLBB orientation. CISC 2LE, 2LL and 2LS names identify orientation; finder properties default explicitly to the 0 mm contact configuration.

Nominal depth series

Browse by series

Use these series labels to filter the finder table above.

2L

Properties

Double Angles properties explained

These properties are especially relevant when comparing Double Angles. View the complete property glossary.

Symbol Property Units Why it matters
Weight Weight lb/ft, kg/m Mass per unit length; used for self-weight and economy comparisons
b Outstanding leg length in, mm Overall width (angle leg or HSS side)
d Back-to-back leg length in, mm Overall depth and clearance
t Leg thickness in, mm Leg thickness for angles
A Cross-sectional area in², mm² Total steel cross-sectional area
Ix Moment of inertia (x) in⁴, mm⁴ Major-axis flexural stiffness
Iy Moment of inertia (y) in⁴, mm⁴ Minor-axis flexural stiffness
Sx Elastic section modulus (x) in³, mm³ Elastic bending property about the x-axis
rx Radius of gyration (x) in, mm Strong-axis radius of gyration
ry Radius of gyration (y) in, mm Weak-axis radius of gyration and lateral stability relevance
J Torsional constant in⁴, mm⁴ Torsional constant
Cw Warping constant in⁶, mm⁶ Warping constant for lateral-torsional behaviour

Library summary

Computed Double Angles summary

The current AISC Double Angles library contains 639 sections across 11 nominal-depth series. Published weights range from 3.30 to 210.00 lb/ft , and actual depths range from 1.50 to 12.00 inches .

Lightest section
2L2X2X1/8
Heaviest section
2L12X12X1-3/8
Ix range
0.25 – 826.00 in⁴
Sx range
0.22 – 97.20 in³

Related families

Related AISC families

W-Shapes M-Shapes S-Shapes HP-Shapes Channels MC Channels All AISC families

Beam calculator

Analyze this family in Optimal Beam

Select a designation and load it into the Optimal Beam calculator.

Open beam calculator

Source: AISC Shapes Database v16.0 · Verified July 2026 · View methodology