Source: https://www.quantumsteeldesign.com/steel-tools/shapes/st/ 28 AISC v16.0 records # AISC American Standard structural tees (ST). An ST is a structural tee produced from an American Standard S-shape. Its flange geometry and proportions differ from WT and MT series tees. ## Common context Common project roles include truss components, lintels, specialty framing, reinforcement, and connections where the ST proportions are specifically useful. ## Detailing watch Check tapered flange effects, stem orientation, connection surface, availability, and exact section properties before replacing or pairing it with another tee series. Use the directory as a reference ## How to read the ST records ST identifies a tee from the S series. The table's depth, flange width and centroid describe the tee; the simplified profile does not reproduce every rolled surface. Check flange taper and the tee's own axis convention before using a reference export for layout or comparison. This dataset contains 28 ST records, with nominal weights from 2.85 to 60.5 lb/ft and listed depth values from 1.5 to 12.3 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, [ST6X20.4](https://www.quantumsteeldesign.com/steel-tools/shapes/st6x20-4/) lists 20.4 lb/ft, 5.96 in² area, Ix = 18.9 in⁴ and Iy = 6.74 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 ST6X20.4 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 × 20.4 lb/ft | 408 lb | 185.066 kg | | 3 pieces | 3 × 408 lb | 1,224 lb | 555.197 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 ST 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 | | --- | --- | --- | --- | --- | | ST12X60.5 | 60.5 lb/ft | 12.3 in | 17.8 in² | 30.1 in³ | | ST12X53 | 53 lb/ft | 12.3 in | 15.6 in² | 24.1 in³ | | ST12X50 | 50 lb/ft | 12 in | 14.7 in² | 26.3 in³ | | ST12X45 | 45 lb/ft | 12 in | 13.2 in² | 22.6 in³ | | ST12X40 | 40 lb/ft | 12 in | 11.7 in² | 18.6 in³ | | ST10X48 | 48 lb/ft | 10.2 in | 14.1 in² | 20.3 in³ | | ST10X43 | 43 lb/ft | 10.2 in | 12.7 in² | 17.2 in³ | | ST10X37.5 | 37.5 lb/ft | 10 in | 11 in² | 15.8 in³ | | ST10X33 | 33 lb/ft | 10 in | 9.7 in² | 12.9 in³ | | ST9X35 | 35 lb/ft | 9 in | 10.3 in² | 14 in³ | | ST9X27.35 | 27.35 lb/ft | 9 in | 8.02 in² | 9.6 in³ | | ST7.5X25 | 25 lb/ft | 7.5 in | 7.34 in² | 7.72 in³ | | ST7.5X21.45 | 21.45 lb/ft | 7.5 in | 6.3 in² | 5.99 in³ | | ST6X25 | 25 lb/ft | 6 in | 7.33 in² | 6.04 in³ | | ST6X20.4 | 20.4 lb/ft | 6 in | 5.96 in² | 4.27 in³ | | ST6X17.5 | 17.5 lb/ft | 6 in | 5.12 in² | 3.95 in³ | | ST6X15.9 | 15.9 lb/ft | 6 in | 4.65 in² | 3.3 in³ | | ST5X17.5 | 17.5 lb/ft | 5 in | 5.14 in² | 3.62 in³ | | ST5X12.7 | 12.7 lb/ft | 5 in | 3.72 in² | 2.05 in³ | | ST4X11.5 | 11.5 lb/ft | 4 in | 3.38 in² | 1.76 in³ | | ST4X9.2 | 9.2 lb/ft | 4 in | 2.7 in² | 1.14 in³ | | ST3X8.6 | 8.6 lb/ft | 3 in | 2.53 in² | 1.02 in³ | | ST3X6.25 | 6.25 lb/ft | 3 in | 1.83 in² | 0.547 in³ | | ST2.5X5 | 5 lb/ft | 2.5 in | 1.46 in² | 0.348 in³ | | ST2X4.75 | 4.75 lb/ft | 2 in | 1.4 in² | 0.319 in³ | | ST2X3.85 | 3.85 lb/ft | 2 in | 1.13 in² | 0.198 in³ | | ST1.5X3.75 | 3.75 lb/ft | 1.5 in | 1.1 in² | 0.187 in³ | | ST1.5X2.85 | 2.85 lb/ft | 1.5 in | 0.83 in² | 0.097 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.