Common context
Common project roles include truss components, lintels, specialty framing, reinforcement, and connections where the ST proportions are specifically useful.
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.
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 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 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 for your own lengths and quantities.
Crawlable designation index
All ST shape records.
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 |
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.