Dimensions and section properties for W18X258
Structural sectional properties for a W18X258 standard steel section
US Customary Units
| Description | Symbol | Value |
|---|---|---|
| Shape Category / Designation | Type | W |
| Section Name | Name | W18X258 |
| Cross Sectional Area | A | 76 in2 |
| Section Width | b | 11.8 in |
| Section Depth | d | 21.5 in |
| Flange thickness | tf | 2.3 in |
| Web thickness | tw | 1.28 in |
| Radius of Gyration about X-X | rx | 8.53 in |
| Radius of Gyrations about Y-Y | ry | 2.88 in |
| Moment of Inertia about X-X | Ix | 5510 in4 |
| Moment of Intertia about Y-Y | Iy | 628 in4 |
| Elastic Section Modulus about X-X | Sx | 514 in3 |
| Elastic Section Modulus about Y-Y | Sy | 107 in3 |
| Plastic Section Modulus about X-X | Zx | 611 in3 |
| Plastic Section Modulus about Y-Y | Zy | 166 in3 |
| St. Venant Torsional Constant | J | 103 in4 |
| Warping Torsion Constant | Cw | 57600 in6 |
| Self Weight of section | Weight | 258 lb/ft |
Metric Units
| Description | Symbol | Value |
|---|---|---|
| Shape Category / Designation | Type | W |
| Section Name | Name | W18X258 |
| Cross Sectional Area | A | 49032 mm2 |
| Section Width | b | 300 mm |
| Section Depth | d | 546 mm |
| Flange thickness | tf | 58.4 mm |
| Web thickness | tw | 32.5 mm |
| Radius of Gyration about X-X | rx | 217 mm |
| Radius of Gyrations about Y-Y | ry | 73 mm |
| Moment of Inertia about X-X | Ix | 2293000000 mm4 |
| Moment of Intertia about Y-Y | Iy | 261000000 mm4 |
| Elastic Section Modulus about X-X | Sx | 8423000 mm3 |
| Elastic Section Modulus about Y-Y | Sy | 1753000 mm3 |
| Plastic Section Modulus about X-X | Zx | 10012000 mm3 |
| Plastic Section Modulus about Y-Y | Zy | 2720000 mm3 |
| St. Venant Torsional Constant | J | 42872000 mm4 |
| Warping Torsion Constant | Cw | 15468000000000 mm6 |
| Self Weight of section | Weight | 384 kg/m |
Note: Metric units have been converted from tabulated imperial values and rounded to a reasonable number of significant figures.
A W18X258 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 11.8 in (300 mm) respectively. It weighs 258 lb/ft (384 kg/m) and has a cross sectional area of 76 in2 (49032 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:
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