Dimensions and section properties for W21X73
Structural sectional properties for a W21X73 standard steel section
US Customary Units
| Description | Symbol | Value |
|---|---|---|
| Shape Category / Designation | Type | W |
| Section Name | Name | W21X73 |
| Cross Sectional Area | A | 21.5 in2 |
| Section Width | b | 8.3 in |
| Section Depth | d | 21.2 in |
| Flange thickness | tf | 0.74 in |
| Web thickness | tw | 0.455 in |
| Radius of Gyration about X-X | rx | 8.64 in |
| Radius of Gyrations about Y-Y | ry | 1.81 in |
| Moment of Inertia about X-X | Ix | 1600 in4 |
| Moment of Intertia about Y-Y | Iy | 70.6 in4 |
| Elastic Section Modulus about X-X | Sx | 151 in3 |
| Elastic Section Modulus about Y-Y | Sy | 17 in3 |
| Plastic Section Modulus about X-X | Zx | 172 in3 |
| Plastic Section Modulus about Y-Y | Zy | 26.6 in3 |
| St. Venant Torsional Constant | J | 3.02 in4 |
| Warping Torsion Constant | Cw | 7410 in6 |
| Self Weight of section | Weight | 73 lb/ft |
Metric Units
| Description | Symbol | Value |
|---|---|---|
| Shape Category / Designation | Type | W |
| Section Name | Name | W21X73 |
| Cross Sectional Area | A | 13871 mm2 |
| Section Width | b | 211 mm |
| Section Depth | d | 538 mm |
| Flange thickness | tf | 18.8 mm |
| Web thickness | tw | 11.6 mm |
| Radius of Gyration about X-X | rx | 219 mm |
| Radius of Gyrations about Y-Y | ry | 46 mm |
| Moment of Inertia about X-X | Ix | 666000000 mm4 |
| Moment of Intertia about Y-Y | Iy | 29000000 mm4 |
| Elastic Section Modulus about X-X | Sx | 2474000 mm3 |
| Elastic Section Modulus about Y-Y | Sy | 279000 mm3 |
| Plastic Section Modulus about X-X | Zx | 2819000 mm3 |
| Plastic Section Modulus about Y-Y | Zy | 436000 mm3 |
| St. Venant Torsional Constant | J | 1257000 mm4 |
| Warping Torsion Constant | Cw | 1990000000000 mm6 |
| Self Weight of section | Weight | 109 kg/m |
Note: Metric units have been converted from tabulated imperial values and rounded to a reasonable number of significant figures.
A W21X73 steel section is a standard North American steel section in the W - Wide Flange category. The height and width of the section are 21.2 in (538 mm) and 8.3 in (211 mm) respectively. It weighs 73 lb/ft (109 kg/m) and has a cross sectional area of 21.5 in2 (13871 mm2).
The section has a tensile yield capacity of:
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The section has a flexural plastic moment capacity of:
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The section has a flexural elastic moment capacity of:
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