Steel Beam Sizes / AISC / Channels / C12x20.7

C12x20.7 Steel Beam Dimensions and Properties

AISC Channels · v16.0

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

Units

Section diagram

C12x20.7 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 20.70 lb/ft 30.80 kg/m
Depth, d 12.00 in 305.00 mm
Flange width, bf 2.94 in 74.70 mm
tw 0.282 in 7.160 mm
tf 0.501 in 12.700 mm
Area 6.08 in² 3,920.00 mm²
Ix 129.00 in⁴ 53,700,000 mm⁴
Iy 3.86 in⁴ 1,610,000 mm⁴
Sx 21.50 in³ 352,000.00 mm³
Sy 1.72 in³ 28,200.00 mm³
Zx 25.60 in³ 420,000.00 mm³
Zy 3.47 in³ 56,900.00 mm³
rx 4.61 in 117.00 mm
ry 0.80 in 20.20 mm
J 0.37 in⁴ 154,000.00 mm⁴
Cw 112.00 in⁶ 30,100,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus C12x20.7.

Heavier in C12

C12x25

Weight
25.0 lb/ft (+21%)
Depth
12.00 in (0.0%)
Ix
144.0 in⁴ (+12%)

Closest Iₓ in C12

C12x30

Weight
30.0 lb/ft (+45%)
Depth
12.00 in (0.0%)
Ix
162.0 in⁴ (+26%)

Similar weight in C10

C10x20

Weight
20.0 lb/ft (-3.4%)
Depth
10.00 in (-17%)
Ix
78.9 in⁴ (-39%)
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Source: AISC Shapes Database v16.0 · Methodology