W18×143 wide-flange beam
Detailing dimensions and section properties from the AISC Shapes Database, 16th Edition. Values are shown to the nearest 1/16 in. as they appear on a shop drawing.
W18×143 measures 19 1/2 in. deep with a 11 1/4 in. flange, on a 3/4 in. web and 1 5/16 in. flanges.
At 143 lb per foot it is one of the 23 W18 sizes, which run from 35 to 311 lb/ft.
For strong-axis bending its section modulus is Sx = 282 in³ and its moment of inertia Ix = 2750 in⁴, with a plastic modulus Zx = 322 in³.
Detailing dimensions
| Depth (d) | 19 1/2" |
|---|---|
| Flange width (bf) | 11 1/4" |
| Web thickness (tw) | 3/4" |
| Flange thickness (tf) | 1 5/16" |
| k (detailing) | 2 3/16" |
| Workable gage (g) | 5 1/2" |
Section properties
| Weight | 143 lb/ft |
|---|---|
| Area (A) | 42 in² |
| Ix | 2750 in⁴ |
| Sx | 282 in³ |
| Zx | 322 in³ |
| rx | 8.09 in |
| Iy | 311 in⁴ |
| Sy | 55.5 in³ |
| Zy | 85.4 in³ |
| ry | 2.72 in |
| J | 19.2 in⁴ |
Other W18 sizes
Same nominal size, different weight — useful when you are checking a substitution or a lighter section.
All W18 sizes and dimensions →
Similar weight wide-flange beams
Comparable 143 lb/ft sections in other wide-flange beam sizes.
Compare W18×143 with a nearby size
Detailing values are rounded to the nearest 1/16 in. per the AISC Steel Construction Manual. Verify critical dimensions against the current Manual before fabrication. Need W18×143 cut, formed, or fabricated? Huntington Steel & Supply Co.
Browse more: Wide flange beams · Steel Beam Size Chart