Dimensions and section properties for W18X71
Structural sectional properties for a W18X71 standard steel section
US Customary Units
| Description | Symbol | Value |
|---|---|---|
| Shape Category / Designation | Type | W |
| Section Name | Name | W18X71 |
| Cross Sectional Area | A | 20.9 in2 |
| Section Width | b | 7.64 in |
| Section Depth | d | 18.5 in |
| Flange thickness | tf | 0.81 in |
| Web thickness | tw | 0.495 in |
| Radius of Gyration about X-X | rx | 7.5 in |
| Radius of Gyrations about Y-Y | ry | 1.7 in |
| Moment of Inertia about X-X | Ix | 1170 in4 |
| Moment of Intertia about Y-Y | Iy | 60.3 in4 |
| Elastic Section Modulus about X-X | Sx | 127 in3 |
| Elastic Section Modulus about Y-Y | Sy | 15.8 in3 |
| Plastic Section Modulus about X-X | Zx | 146 in3 |
| Plastic Section Modulus about Y-Y | Zy | 24.7 in3 |
| St. Venant Torsional Constant | J | 3.49 in4 |
| Warping Torsion Constant | Cw | 4700 in6 |
| Self Weight of section | Weight | 71 lb/ft |
Metric Units
| Description | Symbol | Value |
|---|---|---|
| Shape Category / Designation | Type | W |
| Section Name | Name | W18X71 |
| Cross Sectional Area | A | 13484 mm2 |
| Section Width | b | 194 mm |
| Section Depth | d | 470 mm |
| Flange thickness | tf | 20.6 mm |
| Web thickness | tw | 12.6 mm |
| Radius of Gyration about X-X | rx | 191 mm |
| Radius of Gyrations about Y-Y | ry | 43 mm |
| Moment of Inertia about X-X | Ix | 487000000 mm4 |
| Moment of Intertia about Y-Y | Iy | 25000000 mm4 |
| Elastic Section Modulus about X-X | Sx | 2081000 mm3 |
| Elastic Section Modulus about Y-Y | Sy | 259000 mm3 |
| Plastic Section Modulus about X-X | Zx | 2393000 mm3 |
| Plastic Section Modulus about Y-Y | Zy | 405000 mm3 |
| St. Venant Torsional Constant | J | 1453000 mm4 |
| Warping Torsion Constant | Cw | 1262000000000 mm6 |
| Self Weight of section | Weight | 106 kg/m |
Note: Metric units have been converted from tabulated imperial values and rounded to a reasonable number of significant figures.
A W18X71 steel section is a standard North American steel section in the W - Wide Flange category. The height and width of the section are 18.5 in (470 mm) and 7.64 in (194 mm) respectively. It weighs 71 lb/ft (106 kg/m) and has a cross sectional area of 20.9 in2 (13484 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