Steel Beam Sizes / AISC / W-Shapes / W21 / W21x275

W21x275 Steel Beam Dimensions and Properties

AISC Wide flange · v16.0

Analyze in Beam Calculator Back to W-Shapes All W21

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

Units

Section diagram

W21x275 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 275.00 lb/ft 409.00 kg/m
Depth, d 24.10 in 612.00 mm
Flange width, bf 12.90 in 328.00 mm
tw 1.220 in 31.000 mm
tf 2.190 in 55.600 mm
Area 81.80 in² 52,800.00 mm²
Ix 7,690.00 in⁴ 3,200,000,000 mm⁴
Iy 787.00 in⁴ 328,000,000 mm⁴
Sx 638.00 in³ 10,500,000 mm³
Sy 122.00 in³ 2,000,000 mm³
Zx 749.00 in³ 12,300,000 mm³
Zy 191.00 in³ 3,130,000 mm³
rx 9.70 in 246.00 mm
ry 3.10 in 78.70 mm
J 107.00 in⁴ 44,500,000 mm⁴
Cw 94,400.00 in⁶ 25,400,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus W21x275.

Browse W21 series →

Lighter in W21

W21x248

Weight
248.0 lb/ft (-9.8%)
Depth
23.70 in (-1.7%)
Ix
6,830.0 in⁴ (-11%)

Closest Iₓ in W21

W21x223

Weight
223.0 lb/ft (-19%)
Depth
23.40 in (-2.9%)
Ix
6,080.0 in⁴ (-21%)

Similar weight in W24

W24x279

Weight
279.0 lb/ft (+1.5%)
Depth
26.70 in (+11%)
Ix
9,600.0 in⁴ (+25%)
Analyze in Beam Calculator Compare in W-Shapes finder

Source: AISC Shapes Database v16.0 · Methodology