Dimensions
| Parameter | Symbol | Value | Unit | US customary | Data |
|---|---|---|---|---|---|
| Leg length 1 | b1 | 101.6 | mm | 4.000 in | U |
| Leg length 2 | b2 | 101.6 | mm | 4.000 in | U |
| Thickness | t | 12.7 | mm | 0.500 in | U |
| Root radius | r1 | 9.5 | mm | 0.374 in | U |
Section Properties
| Parameter | Symbol | Value | Unit | US customary | Data |
|---|---|---|---|---|---|
| General | |||||
| Mass per metre | mass | 19.14 | kg/m | 12.86 lb/ft | C |
| Gross area | A | 2,439 | mm² | 3.78 in² | C |
| Centroid x̄ (from left/heel) | xc | 29.9 | mm | 1.179 in | C |
| Centroid ȳ (from bottom) | yc | 29.9 | mm | 1.179 in | C |
| About x-axis (major) | |||||
| Second moment of area IxAbout centroidal axis parallel to leg b2 | Ix | 2.319 | 10⁶ mm⁴ | 5.6 in⁴ | C |
| Elastic section modulus Zx (min) | Zx | 32.4 | 10³ mm³ | 1.97 in³ | C |
| Radius of gyration rx | rx | 30.8 | mm | 1.214 in | C |
| About y-axis (minor) | |||||
| Second moment of area IyAbout centroidal axis parallel to leg b1 | Iy | 2.319 | 10⁶ mm⁴ | 5.6 in⁴ | C |
| Elastic section modulus Zy (min) | Zy | 32.4 | 10³ mm³ | 1.97 in³ | C |
| Radius of gyration ry | ry | 30.8 | mm | 1.214 in | C |
| Principal axes | |||||
| Major principal second moment I1 | I1 | 3.675 | 10⁶ mm⁴ | 8.8 in⁴ | C |
| Minor principal second moment I2 | I2 | 0.964 | 10⁶ mm⁴ | 2.3 in⁴ | C |
| Minimum radius of gyration r2 | r2 | 19.9 | mm | 0.783 in | C |
| Principal axis angleAngle between x-axis and major principal axis | alpha | 45.0 | ° | 45.0 ° | C |
| Torsion & warping | |||||
| Torsion constant JApproximate thin-walled value, fillets neglected | J | 0.130 | 10⁶ mm⁴ | 0.3 in⁴ | C |
| Surface area | |||||
| External surface areaToe radii neglected | extArea | 0.402 | m²/m | 1.320 ft²/ft | C |
Nominal designation mass 19.05 kg/m; calculated 19.14 kg/m (+0.5%).
Steel Grades
| Grade | Standard | fy MPa | fu MPa | Note | Data |
|---|---|---|---|---|---|
| A36 (36 ksi) | ASTM A36/A36M | 250 | 400 | Common grade for angles | U |
| A572 Grade 50 | ASTM A572/A572M | 345 | 450 | Available – confirm with supplier | U |
Strengths shown for governing thickness t = 12.7 mm. Density 7850 kg/m³, E = 200 000 MPa.
Where to buy
Producers of Angles – local mills first. Buy direct from the mill for large tonnages, or through a steel distributor / stockist for small quantities and cut lengths.
Local producer
Standards: ASTM A36
Local producer
Standards: ASTM A36, ASTM A572
Supplies this market
Standards: EN 10056-1
International producer
Standards: EN 10056-1
International producer
Standards: AS/NZS 3679.1
International producer
Standards: IS 808, IS 2062
Buying checklist
- Specify the section designation, product standard and steel grade exactly (e.g. "L4x4x1/2 – ASTM A6/A6M – A36 (36 ksi)").
- 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
- ASTM A6/A6M and AISC Shapes Database (angles)
- Edition
- —
- Publication year
- —
- Page reference
- —
- Last updated
- 2026-10-12
- Verification status
- Unverified
Toe radii neglected in calculated properties. Nominal dimensions require verification against ASTM A6/A6M and AISC Shapes Database (angles) and the manufacturer catalogue before design use.