Steel Beam Sizes / AISC / W-Shapes / W12 / W12x45

W12x45 Steel Beam Dimensions and Properties

AISC Wide flange · v16.0

Analyze in Beam Calculator Back to W-Shapes All W12

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

Units

Section diagram

W12x45 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 45.00 lb/ft 67.00 kg/m
Depth, d 12.10 in 307.00 mm
Flange width, bf 8.05 in 204.00 mm
tw 0.335 in 8.510 mm
tf 0.575 in 14.600 mm
Area 13.10 in² 8,450.00 mm²
Ix 348.00 in⁴ 145,000,000 mm⁴
Iy 50.00 in⁴ 20,800,000 mm⁴
Sx 57.70 in³ 946,000.00 mm³
Sy 12.40 in³ 203,000.00 mm³
Zx 64.20 in³ 1,050,000 mm³
Zy 19.00 in³ 311,000.00 mm³
rx 5.15 in 131.00 mm
ry 1.95 in 49.50 mm
J 1.26 in⁴ 524,000.00 mm⁴
Cw 1,650.00 in⁶ 443,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus W12x45.

Browse W12 series →

Lighter in W12

W12x40

Weight
40.0 lb/ft (-11%)
Depth
11.90 in (-1.7%)
Ix
307.0 in⁴ (-12%)

Heavier in W12

W12x50

Weight
50.0 lb/ft (+11%)
Depth
12.20 in (+0.8%)
Ix
391.0 in⁴ (+12%)

Closest Iₓ in W12

W12x35

Weight
35.0 lb/ft (-22%)
Depth
12.50 in (+3.3%)
Ix
285.0 in⁴ (-18%)

Similar weight in W10

W10x45

Weight
45.0 lb/ft (0.0%)
Depth
10.10 in (-17%)
Ix
248.0 in⁴ (-29%)
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Source: AISC Shapes Database v16.0 · Methodology