Common context
Common project roles include beams, monorails, crane-related or industrial framing, and existing-building work where the S series is specified or matched.
28 AISC v16.0 records
AISC American Standard beams (S).
An S-shape is a hot-rolled, doubly symmetric beam with proportions and flange geometry different from a W-shape. It is identified by nominal depth and weight per foot.
Detailing watch
Check tapered flange geometry, connection surface, gage, fit-up, availability, and avoid substituting a W-shape solely because depth and weight appear similar.
Use the directory as a reference
How to read the S records
The S designation carries a depth series and weight per foot. Actual d, bf and the web and flange thicknesses distinguish one row from nearby sections.
S flanges have geometry that a sharp-corner outline simplifies. Check the controlling rolled-shape and detailing information before using the export at a connection surface.
This dataset contains 28 S records, with nominal weights from 5.7 to 121 lb/ft and listed depth values from 3 to 24.5 in. These ranges describe the published records, not current supplier inventory or a selection recommendation.
Start with the exact designation, open its full record, then compare only the dimensions and properties relevant to your task. For example, S12X40.8 lists 40.8 lb/ft, 11.9 in² area, Ix = 270 in⁴ and Iy = 13.5 in⁴. The x and y labels retain the database axes; their values do not establish allowable loads.
The AISC v16.0 workbook Readme defines the variables and shape figures. This directory uses the US customary record; the comparison tool converts displayed units. Check the required edition and product specification before transferring data.
Worked quantity example
Nominal weight for S12X40.8
Assume 3 pieces, each 20 ft (6.096 m) long. This is a hypothetical quantity example, not a stock-length or lifting recommendation.
| Quantity | Calculation | Nominal pounds | Kilogram equivalent |
|---|---|---|---|
| One 20 ft piece | 20 ft × 40.8 lb/ft | 816 lb | 370.131 kg |
| 3 pieces | 3 × 816 lb | 2,448 lb | 1,110.394 kg |
Conversion: 1 lb = 0.45359237 kg; displayed results are rounded. This multiplication excludes connection plates, bolts, weld metal, coatings, cutting allowances and actual material variation. Use the material takeoff for your own lengths and quantities.
Crawlable designation index
All S shape records.
Showing all 28 records.
| Designation | Weight | Depth / OD / d | Area | X-axis Sx |
|---|---|---|---|---|
| S24X121 | 121 lb/ft | 24.5 in | 35.5 in² | 258 in³ |
| S24X106 | 106 lb/ft | 24.5 in | 31.1 in² | 240 in³ |
| S24X100 | 100 lb/ft | 24 in | 29.3 in² | 199 in³ |
| S24X90 | 90 lb/ft | 24 in | 26.5 in² | 187 in³ |
| S24X80 | 80 lb/ft | 24 in | 23.5 in² | 175 in³ |
| S20X96 | 96 lb/ft | 20.3 in | 28.2 in² | 165 in³ |
| S20X86 | 86 lb/ft | 20.3 in | 25.3 in² | 155 in³ |
| S20X75 | 75 lb/ft | 20 in | 22 in² | 128 in³ |
| S20X66 | 66 lb/ft | 20 in | 19.4 in² | 119 in³ |
| S18X70 | 70 lb/ft | 18 in | 20.5 in² | 103 in³ |
| S18X54.7 | 54.7 lb/ft | 18 in | 16 in² | 89 in³ |
| S15X50 | 50 lb/ft | 15 in | 14.7 in² | 64.7 in³ |
| S15X42.9 | 42.9 lb/ft | 15 in | 12.6 in² | 59.4 in³ |
| S12X50 | 50 lb/ft | 12 in | 14.7 in² | 50.6 in³ |
| S12X40.8 | 40.8 lb/ft | 12 in | 11.9 in² | 45.1 in³ |
| S12X35 | 35 lb/ft | 12 in | 10.2 in² | 38.1 in³ |
| S12X31.8 | 31.8 lb/ft | 12 in | 9.31 in² | 36.2 in³ |
| S10X35 | 35 lb/ft | 10 in | 10.3 in² | 29.4 in³ |
| S10X25.4 | 25.4 lb/ft | 10 in | 7.45 in² | 24.6 in³ |
| S8X23 | 23 lb/ft | 8 in | 6.76 in² | 16.2 in³ |
| S8X18.4 | 18.4 lb/ft | 8 in | 5.4 in² | 14.4 in³ |
| S6X17.25 | 17.25 lb/ft | 6 in | 5.05 in² | 8.74 in³ |
| S6X12.5 | 12.5 lb/ft | 6 in | 3.66 in² | 7.34 in³ |
| S5X10 | 10 lb/ft | 5 in | 2.93 in² | 4.9 in³ |
| S4X9.5 | 9.5 lb/ft | 4 in | 2.79 in² | 3.38 in³ |
| S4X7.7 | 7.7 lb/ft | 4 in | 2.26 in² | 3.03 in³ |
| S3X7.5 | 7.5 lb/ft | 3 in | 2.2 in² | 1.94 in³ |
| S3X5.7 | 5.7 lb/ft | 3 in | 1.66 in² | 1.67 in³ |
Values are derived from the AISC Shapes Database v16.0 in US customary units. Open a designation for its full property table, nominal profile, downloads, source notes, and limitations.