W21 Beam Sizes and Section Properties
Compare AISC W21 wide-flange sections by weight, actual depth, flange width, moment of inertia and section modulus.
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AISC Shapes Database v16.0 · 2,299 sections
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Showing the most relevant 75 sections.
| Designation | Weight (lb/ft) | Depth, d (in) | Flange width, bf (in) | Area (in²) | Ix (in⁴) | Sx (in³) |
|---|---|---|---|---|---|---|
| W21x275 | 275 | 24.1 | 12.9 | 81.8 | 7690 | 638 |
| W21x248 | 248 | 23.7 | 12.8 | 73.8 | 6830 | 576 |
| W21x223 | 223 | 23.4 | 12.7 | 66.5 | 6080 | 520 |
| W21x201 | 201 | 23 | 12.6 | 59.3 | 5310 | 461 |
| W21x182 | 182 | 22.7 | 12.5 | 53.6 | 4730 | 417 |
| W21x166 | 166 | 22.5 | 12.4 | 48.8 | 4280 | 380 |
| W21x147 | 147 | 22.1 | 12.5 | 43.2 | 3630 | 329 |
| W21x132 | 132 | 21.8 | 12.4 | 38.8 | 3220 | 295 |
| W21x122 | 122 | 21.7 | 12.4 | 35.9 | 2960 | 273 |
| W21x93 | 93 | 21.6 | 8.42 | 27.3 | 2070 | 192 |
| W21x111 | 111 | 21.5 | 12.3 | 32.6 | 2670 | 249 |
| W21x83 | 83 | 21.4 | 8.36 | 24.4 | 1830 | 171 |
| W21x101 | 101 | 21.4 | 12.3 | 29.8 | 2420 | 227 |
| W21x73 | 73 | 21.2 | 8.3 | 21.5 | 1600 | 151 |
| W21x57 | 57 | 21.1 | 6.56 | 16.7 | 1170 | 111 |
| W21x68 | 68 | 21.1 | 8.27 | 20 | 1480 | 140 |
| W21x62 | 62 | 21 | 8.24 | 18.3 | 1330 | 127 |
| W21x50 | 50 | 20.8 | 6.53 | 14.7 | 984 | 94.5 |
| W21x55 | 55 | 20.8 | 8.22 | 16.2 | 1140 | 110 |
| W21x44 | 44 | 20.7 | 6.5 | 13 | 843 | 81.6 |
| W21x48 | 48 | 20.6 | 8.14 | 14.1 | 959 | 93 |
Series overview
W21 series
The W21 series groups AISC W-family shapes that share the same nominal-depth designation prefix. Weights and actual depths still vary within the series, so use the table below to compare candidates before analysis.
The AISC W21 series contains 21 published sections ranging from 44.00 to 275.00 lb/ft . Actual depths range from 20.60 to 24.10 inches, despite the shared W21 nominal designation .
- Lightest W21
- W21X44
- Highest Ix
- W21X275
- Shallowest actual depth
- W21X48
- Widest flange
- W21X275
Beam calculator
Analyze a W21 section
Select a designation above and load it into Optimal Beam for span, support and load analysis.
Source: AISC Shapes Database v16.0 · Methodology
Questions & answers
W21 FAQs
What is the W21 series?
It is the set of published AISC W shapes whose designation begins with W21. Members share a nominal-depth label but can differ in weight, actual depth and properties.
Why do actual depths differ within W21?
The number in the designation is nominal. Published overall depth varies by weight. Always use the tabulated depth for clearance and detailing.
How should I choose among W21 weights?
Compare weight, Ix, Sx, flange geometry and project constraints, then analyze finalists under the same span and loads. There is no universal “best” section.
Can I analyze a W21 section in Optimal Beam?
Yes. Select a designation above and choose Analyze to load its properties into the beam calculator.