Source: https://www.quantumsteeldesign.com/steel-tools/shapes/s/ 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. ## 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. ## 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](https://www.quantumsteeldesign.com/steel-tools/shapes/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](https://www.aisc.org/aisc/publications/steel-construction-manual/aisc-shapes-database-v160/) 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](https://www.quantumsteeldesign.com/material-takeoff/) for your own lengths and quantities. Crawlable designation index ## All S shape records. [View all shape families](https://www.quantumsteeldesign.com/steel-tools/shapes/) Filter by designation 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 | Reference use only. Values are derived from the [AISC Shapes Database v16.0](https://www.aisc.org/aisc/publications/steel-construction-manual/aisc-shapes-database-v160/) in US customary units. Open a designation for its full property table, nominal profile, downloads, source notes, and limitations.