Steel Beam Sizes / AISC / ST Tees / ST12x45

ST12x45 Steel Beam Dimensions and Properties

AISC American standard tees · v16.0

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

Units

Section diagram

ST12x45 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 12.00 in 305.00 mm
Flange width, bf 7.13 in 181.00 mm
tw 0.625 in 15.900 mm
tf 0.870 in 22.100 mm
Area 13.20 in² 8,520.00 mm²
Ix 190.00 in⁴ 79,100,000 mm⁴
Iy 22.30 in⁴ 9,280,000 mm⁴
Sx 22.60 in³ 370,000.00 mm³
Sy 6.27 in³ 103,000.00 mm³
Zx 41.10 in³ 674,000.00 mm³
Zy 11.20 in³ 184,000.00 mm³
rx 3.79 in 96.30 mm
ry 1.30 in 33.00 mm
J 3.01 in⁴ 1,250,000 mm⁴
Cw 12.10 in⁶ 3,250,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus ST12x45.

Lighter in ST12

ST12x40

Weight
40.0 lb/ft (-11%)
Depth
12.00 in (0.0%)
Ix
162.0 in⁴ (-15%)

Heavier in ST12

ST12x50

Weight
50.0 lb/ft (+11%)
Depth
12.00 in (0.0%)
Ix
215.0 in⁴ (+13%)

Closest Iₓ in ST12

ST12x53

Weight
53.0 lb/ft (+18%)
Depth
12.30 in (+2.5%)
Ix
216.0 in⁴ (+14%)

Similar weight in ST10

ST10x43

Weight
43.0 lb/ft (-4.4%)
Depth
10.20 in (-15%)
Ix
124.0 in⁴ (-35%)
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Source: AISC Shapes Database v16.0 · Methodology