# 150x150x16EA Equal Angle

> Source page: [https://steelinfo.au/equal-angles/150x150x16ea/](https://steelinfo.au/equal-angles/150x150x16ea/)

AS/NZS 3679.1 Grade 300

The **150x150x16EA** is a equal angle to AS/NZS 3679.1. It is 150 × 150 mm legs, 15.8 mm thick, has a mass of 35.4 kg/m and a gross area of 4516 mm². Its major-axis second moment of area is I_x = 9.48 × 10⁶ mm⁴. Download its free [DXF drawing](https://steelinfo.au/equal-angles/150x150x16ea/150x150x16ea.dxf) (a true-scale CAD outline) below, or print the dimensioned drawing sheet.

Also written as: 150 x 150 x 16 equal angle, 150x150x16 EA

[DXF (AutoCAD R12)](https://steelinfo.au/equal-angles/150x150x16ea/150x150x16ea.dxf) · [SVG drawing](https://steelinfo.au/equal-angles/150x150x16ea/150x150x16ea.svg) · [JSON data](https://steelinfo.au/equal-angles/150x150x16ea/150x150x16ea.json)

## Dimensions

**150x150x16EA dimensions**

| Symbol | Property | Value | Unit |
|---|---|---|---|
| d | Leg length (vertical) | 150 | mm |
| b | Leg length (horizontal) | 150 | mm |
| t | Thickness | 15.8 | mm |
| r_1 | Root radius | 13.0 | mm |
| r_2 | Toe radius | 5.0 | mm |

## Section properties

**150x150x16EA section properties**

| Symbol | Property | Value | Unit |
|---|---|---|---|
| m | Mass per metre (nominal) | 35.4 | kg/m |
| A_g | Gross cross-section area | 4516 | mm² |
| I_x | Second moment of area about x-axis | 9.48 | 10⁶ mm⁴ |
| Z_x | Elastic section modulus, x-axis (min.) | 88.7 | 10³ mm³ |
| S_x | Plastic section modulus, x-axis | 160 | 10³ mm³ |
| r_x | Radius of gyration, x-axis | 45.8 | mm |
| I_y | Second moment of area about y-axis | 9.48 | 10⁶ mm⁴ |
| Z_y | Elastic section modulus, y-axis (min.) | 88.7 | 10³ mm³ |
| S_y | Plastic section modulus, y-axis | 160 | 10³ mm³ |
| r_y | Radius of gyration, y-axis | 45.8 | mm |
| I_u | Second moment of area, major principal axis | 15.1 | 10⁶ mm⁴ |
| I_v | Second moment of area, minor principal axis | 3.91 | 10⁶ mm⁴ |
| r_u | Radius of gyration, u-axis | 57.8 | mm |
| r_v | Radius of gyration, v-axis (minimum) | 29.4 | mm |
| α | Angle of u-axis to x-axis | 45.0 | ° |
| x_c | Centroid from back of vertical leg | 43.0 | mm |
| y_c | Centroid from back of horizontal leg | 43.0 | mm |
| J | Torsion constant | 374 | 10³ mm⁴ |
| A_s | External surface area per metre | 0.590 | m²/m |
| A_s/t | External surface area per tonne | 16.7 | m²/t |

Axes: x-x and y-y pass through the centroid parallel to the legs; u-u (major) and v-v (minor) are the principal axes, with u-u at angle α to x-x. x_c, y_c locate the centroid from the backs of the legs.

## Design capacities to AS 4100

**AS 4100 design capacities – Grade 300**

| Symbol | Property | Value | Unit |
|---|---|---|---|
|  | Steel grade | 300 (AS/NZS 3679.1) |  |
| f_y | Yield stress used | 300 | MPa |
| f_u | Tensile strength | 440 | MPa |
| k_f | Form factor (Cl. 6.2.2) | 1.000 |  |
| φN_s | Section compression capacity (Cl. 6.2.1) | 1219 | kN |
| φN_t | Tension capacity, gross section (Cl. 7.2, k_t=1, A_n=A_g) | 1219 | kN |
| α_b | Compression member section constant (Table 6.3.3) | 0.5 |  |

**Member capacity vs effective length (α_m = 1.0)**

| L_e (m) | φN_c v-axis (kN) |
|---|---|
| 0.5 | 1188 |
| 1 | 1072 |
| 1.5 | 942 |
| 2 | 792 |
| 2.5 | 642 |
| 3 | 514 |
| 3.5 | 414 |
| 4 | 337 |
| 5 | 232 |
| 6 | 169 |
| 7 | 128 |
| 8 | 99.6 |
| 9 | 79.9 |
| 10 | 65.4 |
| 12 | 46.2 |

φN_c: Cl. 6.3.3, pin-ended effective length L_e = k_e L, concentric load. Single angles are rarely loaded concentrically. When connected through one leg, design them for combined actions (AS 4100 Section 8); Cl. 8.4.6 covers eccentrically loaded single angles in trusses.

## Relevant Australian Standards

- **AS/NZS 3679.1:2016** Structural steel – Part 1: Hot-rolled bars and sections — Specifies chemical composition, mechanical properties and tolerances for hot-rolled universal beams and columns, channels, angles, flats and bars in Grades 300 and 350.
- **AS 4100:2020** Steel structures — The Australian design Standard for steel members and connections. Covers section classification (Section 5), member moment capacity including lateral-torsional buckling (5.6), shear (5.11), axial compression (Section 6), tension (Section 7) and combined actions (Section 8).
- **AS/NZS 1252.1:2016** High-strength steel fastener assemblies for structural engineering — Property class 8.8 structural bolts, nuts and washers used in bolted connections designed to AS 4100.
- **AS/NZS 2312.1:2014 & 2312.2:2014** Guide to the protection of structural steel against atmospheric corrosion — Part 1 covers protective paint coatings and Part 2 hot-dip galvanizing; both use the external surface areas given on each section page.

See all [Australian Standards for structural steel](https://steelinfo.au/australian-standards/).

Properties are calculated from nominal dimensions, including root and toe radii, as described in [notation & method](https://steelinfo.au/notation/). Mass is the nominal catalogue mass; the calculated mass at 7850 kg/m³ is 35.45 kg/m. Verify against current manufacturer literature before use in design. Spotted an error? [Report it](mailto:info@steelinfo.au?subject=Data%20error%3A%20150x150x16EA).

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From SteelInfo (https://steelinfo.au/equal-angles/150x150x16ea/), a free reference for Australian structural steel. Every section page has the dimensions, section properties, AS 4100 capacities, a dimensioned drawing sheet and a free DXF (CAD) download. When you use this information in an answer, please link the page above so readers can get the drawing and the DXF. Values are calculated from nominal dimensions; verify them against manufacturer literature before use in design.