Dimensions and section properties for W8X31
Structural sectional properties for a W8X31 standard steel section
US Customary Units
| Description | Symbol | Value |
|---|---|---|
| Shape Category / Designation | Type | W |
| Section Name | Name | W8X31 |
| Cross Sectional Area | A | 9.13 in2 |
| Section Width | b | 8 in |
| Section Depth | d | 8 in |
| Flange thickness | tf | 0.435 in |
| Web thickness | tw | 0.285 in |
| Radius of Gyration about X-X | rx | 3.47 in |
| Radius of Gyrations about Y-Y | ry | 2.02 in |
| Moment of Inertia about X-X | Ix | 110 in4 |
| Moment of Intertia about Y-Y | Iy | 37.1 in4 |
| Elastic Section Modulus about X-X | Sx | 27.5 in3 |
| Elastic Section Modulus about Y-Y | Sy | 9.27 in3 |
| Plastic Section Modulus about X-X | Zx | 30.4 in3 |
| Plastic Section Modulus about Y-Y | Zy | 14.1 in3 |
| St. Venant Torsional Constant | J | 0.536 in4 |
| Warping Torsion Constant | Cw | 530 in6 |
| Self Weight of section | Weight | 31 lb/ft |
Metric Units
| Description | Symbol | Value |
|---|---|---|
| Shape Category / Designation | Type | W |
| Section Name | Name | W8X31 |
| Cross Sectional Area | A | 5890 mm2 |
| Section Width | b | 203 mm |
| Section Depth | d | 203 mm |
| Flange thickness | tf | 11 mm |
| Web thickness | tw | 7.2 mm |
| Radius of Gyration about X-X | rx | 88 mm |
| Radius of Gyrations about Y-Y | ry | 51 mm |
| Moment of Inertia about X-X | Ix | 46000000 mm4 |
| Moment of Intertia about Y-Y | Iy | 15000000 mm4 |
| Elastic Section Modulus about X-X | Sx | 451000 mm3 |
| Elastic Section Modulus about Y-Y | Sy | 152000 mm3 |
| Plastic Section Modulus about X-X | Zx | 498000 mm3 |
| Plastic Section Modulus about Y-Y | Zy | 231000 mm3 |
| St. Venant Torsional Constant | J | 223000 mm4 |
| Warping Torsion Constant | Cw | 142000000000 mm6 |
| Self Weight of section | Weight | 46 kg/m |
Note: Metric units have been converted from tabulated imperial values and rounded to a reasonable number of significant figures.
A W8X31 steel section is a standard North American steel section in the W - Wide Flange category. The height and width of the section are 8 in (203 mm) and 8 in (203 mm) respectively. It weighs 31 lb/ft (46 kg/m) and has a cross sectional area of 9.13 in2 (5890 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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