Dimensions and section properties for W21X111
Structural sectional properties for a W21X111 standard steel section
US Customary Units
| Description | Symbol | Value |
|---|---|---|
| Shape Category / Designation | Type | W |
| Section Name | Name | W21X111 |
| Cross Sectional Area | A | 32.6 in2 |
| Section Width | b | 12.3 in |
| Section Depth | d | 21.5 in |
| Flange thickness | tf | 0.875 in |
| Web thickness | tw | 0.55 in |
| Radius of Gyration about X-X | rx | 9.05 in |
| Radius of Gyrations about Y-Y | ry | 2.9 in |
| Moment of Inertia about X-X | Ix | 2670 in4 |
| Moment of Intertia about Y-Y | Iy | 274 in4 |
| Elastic Section Modulus about X-X | Sx | 249 in3 |
| Elastic Section Modulus about Y-Y | Sy | 44.5 in3 |
| Plastic Section Modulus about X-X | Zx | 279 in3 |
| Plastic Section Modulus about Y-Y | Zy | 68.2 in3 |
| St. Venant Torsional Constant | J | 6.83 in4 |
| Warping Torsion Constant | Cw | 29200 in6 |
| Self Weight of section | Weight | 111 lb/ft |
Metric Units
| Description | Symbol | Value |
|---|---|---|
| Shape Category / Designation | Type | W |
| Section Name | Name | W21X111 |
| Cross Sectional Area | A | 21032 mm2 |
| Section Width | b | 312 mm |
| Section Depth | d | 546 mm |
| Flange thickness | tf | 22.2 mm |
| Web thickness | tw | 14 mm |
| Radius of Gyration about X-X | rx | 230 mm |
| Radius of Gyrations about Y-Y | ry | 74 mm |
| Moment of Inertia about X-X | Ix | 1111000000 mm4 |
| Moment of Intertia about Y-Y | Iy | 114000000 mm4 |
| Elastic Section Modulus about X-X | Sx | 4080000 mm3 |
| Elastic Section Modulus about Y-Y | Sy | 729000 mm3 |
| Plastic Section Modulus about X-X | Zx | 4572000 mm3 |
| Plastic Section Modulus about Y-Y | Zy | 1118000 mm3 |
| St. Venant Torsional Constant | J | 2843000 mm4 |
| Warping Torsion Constant | Cw | 7841000000000 mm6 |
| Self Weight of section | Weight | 165 kg/m |
Note: Metric units have been converted from tabulated imperial values and rounded to a reasonable number of significant figures.
A W21X111 steel section is a standard North American steel section in the W - Wide Flange category. The height and width of the section are 21.5 in (546 mm) and 12.3 in (312 mm) respectively. It weighs 111 lb/ft (165 kg/m) and has a cross sectional area of 32.6 in2 (21032 mm2).
The section has a tensile yield capacity of:
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The section has a flexural plastic moment capacity of:
kip-ft
The section has a flexural elastic moment capacity of:
kip-ft