Steel Beam Sizes / AISC / Double Angles / 2L8x4x1x3/4LLBB

2L8x4x1x3/4LLBB Steel Beam Dimensions and Properties

AISC Double angles · v16.0

Analyze in Beam Calculator Back to Double Angles

Diagram, properties emphasis, and nearby alternatives use the selected unit system.

Units

Section diagram

2L8x4x1x3/4LLBB dimensions

Not to scale. Dimensions shown for reference.

Section properties

Symbols match the steel section finder. Imperial and metric values are shown side by side.

Property Imperial Metric
Weight 74.80 lb/ft 111.00 kg/m
Width 4.00 in 102.00 mm
Height 8.00 in 203.00 mm
t 1.000 in 25.400 mm
Area 22.20 in² 14,300.00 mm²
Ix 139.00 in⁴ 57,900,000 mm⁴
Sx 28.00 in³ 459,000.00 mm³
rx 2.51 in 63.80 mm

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus 2L8x4x1x3/4LLBB.

Lighter in Double angles

2L8x6x3/4LLBB

Weight
67.6 lb/ft (-9.6%)
Depth
8.00 in (0.0%)
Ix
127.0 in⁴ (-8.6%)

Heavier in Double angles

2L8x8x3/4

Weight
77.8 lb/ft (+4.0%)
Depth
8.00 in (0.0%)
Ix
140.0 in⁴ (+0.7%)

Closest Iₓ in Double angles

2L8x4x1LLBB

Weight
74.8 lb/ft (0.0%)
Depth
8.00 in (0.0%)
Ix
139.0 in⁴ (0.0%)
Analyze in Beam Calculator Compare in Double Angles finder

Source: AISC Shapes Database v16.0 · Methodology