Dimensions and section properties for W8X21
Structural sectional properties for a W8X21 standard steel section
US Customary Units
| Description | Symbol | Value |
|---|---|---|
| Shape Category / Designation | Type | W |
| Section Name | Name | W8X21 |
| Cross Sectional Area | A | 6.16 in2 |
| Section Width | b | 5.27 in |
| Section Depth | d | 8.28 in |
| Flange thickness | tf | 0.4 in |
| Web thickness | tw | 0.25 in |
| Radius of Gyration about X-X | rx | 3.49 in |
| Radius of Gyrations about Y-Y | ry | 1.26 in |
| Moment of Inertia about X-X | Ix | 75.3 in4 |
| Moment of Intertia about Y-Y | Iy | 9.77 in4 |
| Elastic Section Modulus about X-X | Sx | 18.2 in3 |
| Elastic Section Modulus about Y-Y | Sy | 3.71 in3 |
| Plastic Section Modulus about X-X | Zx | 20.4 in3 |
| Plastic Section Modulus about Y-Y | Zy | 5.69 in3 |
| St. Venant Torsional Constant | J | 0.282 in4 |
| Warping Torsion Constant | Cw | 152 in6 |
| Self Weight of section | Weight | 21 lb/ft |
Metric Units
| Description | Symbol | Value |
|---|---|---|
| Shape Category / Designation | Type | W |
| Section Name | Name | W8X21 |
| Cross Sectional Area | A | 3974 mm2 |
| Section Width | b | 134 mm |
| Section Depth | d | 210 mm |
| Flange thickness | tf | 10.2 mm |
| Web thickness | tw | 6.4 mm |
| Radius of Gyration about X-X | rx | 89 mm |
| Radius of Gyrations about Y-Y | ry | 32 mm |
| Moment of Inertia about X-X | Ix | 31000000 mm4 |
| Moment of Intertia about Y-Y | Iy | 4000000 mm4 |
| Elastic Section Modulus about X-X | Sx | 298000 mm3 |
| Elastic Section Modulus about Y-Y | Sy | 61000 mm3 |
| Plastic Section Modulus about X-X | Zx | 334000 mm3 |
| Plastic Section Modulus about Y-Y | Zy | 93000 mm3 |
| St. Venant Torsional Constant | J | 117000 mm4 |
| Warping Torsion Constant | Cw | 41000000000 mm6 |
| Self Weight of section | Weight | 31 kg/m |
Note: Metric units have been converted from tabulated imperial values and rounded to a reasonable number of significant figures.
A W8X21 steel section is a standard North American steel section in the W - Wide Flange category. The height and width of the section are 8.28 in (210 mm) and 5.27 in (134 mm) respectively. It weighs 21 lb/ft (31 kg/m) and has a cross sectional area of 6.16 in2 (3974 mm2).
The section has a tensile yield capacity of:
kip
The section has a flexural plastic moment capacity of:
kip-ft
The section has a flexural elastic moment capacity of:
kip-ft