125BT15.7
125BT15.7 Tee (cut from 250UB31.4) — parent section 250UB31.4
Mass15.75kg/m
A2,006mm²
Ix2.65010⁶ mm⁴
Zx26.710³ mm³
Dimensions
| Parameter | Symbol | Value | Unit | Data |
|---|---|---|---|---|
| Depth | d | 126.0 | mm | C |
| Flange width | bf | 146.0 | mm | U |
| Flange thickness | tf | 8.6 | mm | U |
| Web thickness | tw | 6.1 | mm | U |
| Root radius | r1 | 8.9 | mm | U |
Section Properties
| Parameter | Symbol | Value | Unit | Data |
|---|---|---|---|---|
| General | ||||
| Mass per metre | mass | 15.75 | kg/m | C |
| Gross area | A | 2,006 | mm² | C |
| Centroid ȳ (from bottom) | yc | 99.1 | mm | C |
| About x-axis (major) | ||||
| Second moment of area Ix | Ix | 2.650 | 10⁶ mm⁴ | C |
| Elastic section modulus Zx (min)Minimum (stem tip) | Zx | 26.7 | 10³ mm³ | C |
| Plastic section modulus Sx | Sx | 47.1 | 10³ mm³ | C |
| Radius of gyration rx | rx | 36.3 | mm | C |
| About y-axis (minor) | ||||
| Second moment of area Iy | Iy | 2.234 | 10⁶ mm⁴ | C |
| Elastic section modulus Zy (min) | Zy | 30.6 | 10³ mm³ | C |
| Plastic section modulus Sy | Sy | 47.1 | 10³ mm³ | C |
| Radius of gyration ry | ry | 33.4 | mm | C |
| Torsion & warping | ||||
| Torsion constant JApproximate thin-walled value, fillets neglected | J | 0.040 | 10⁶ mm⁴ | C |
| Surface area | ||||
| External surface area | extArea | 0.536 | m²/m | C |
Steel Grades
| Grade | Standard | fy MPa | fu MPa | Note | Data |
|---|---|---|---|---|---|
| 300 | AS/NZS 3679.1:2016 | 320 | 440 | Grade of the parent section | U |
Strengths shown for governing thickness t = 8.6 mm. Density 7850 kg/m³, E = 200 000 MPa.
Where to buy
Producers of Tees – local mills first. Buy direct from the mill for large tonnages, or through a steel distributor / stockist for small quantities and cut lengths.
No producer has been listed for this product type yet. Mills can be added as XML in data/mills/ or through the admin upload page.
Buying checklist
- Specify the section designation, product standard and steel grade exactly (e.g. "125BT15.7 – AS/NZS 3679.1:2016 – 300").
- Ask for mill test certificates (EN 10204 type 3.1 or equivalent) traceable to the heat number.
- Sections from another standard system are not automatically equivalent – have the engineer approve any substitution.
- Check availability, minimum order quantity, stock lengths, lead time and delivery terms with the mill or distributor.
All producers of this product type →
Listing is informational only – not an endorsement, offer or confirmation of availability. Company details are marked UNVERIFIED until checked.
Source & Verification
- Source publisher
- Pending verification – nominal dimensions entered by the application developer
- Source document
- Derived from parent AS/NZS 3679.1 section (cut at mid-depth)
- Edition
- —
- Publication year
- —
- Page reference
- —
- Last updated
- 2026-10-12
- Verification status
- Unverified
Tee obtained by cutting the parent section at mid-depth; cutting kerf neglected. Parent dimensions are UNVERIFIED.