Column Tees (CT) CT
Cut from AS/NZS 3679.1 UCTees made by splitting a universal column along the web centreline, used for heavier truss chords. Dimensions, section properties, AS 4100 capacities and free DXF drawings for all 13 sizes.
Column tees (CT) are cut from universal columns along the web centreline. Their wide flange gives a stiffer, more stable tee for heavier truss chords and struts.
A tee's centroid sits close to the flange, so the elastic modulus to the stem tip (Zx) is much smaller than to the flange (Zxf). Tees are singly symmetric, and in compression flexural-torsional buckling can govern; the φNc values shown are for flexural buckling only.
Select any section in the table to open its page, with a dimensioned drawing, all section properties, AS 4100 capacities and a free DXF download for your CAD software.
| Designation | Mass kg/m | d mm | bf mm | tf mm | tw mm | Ag mm² | Ix 10⁶mm⁴ | Zx 10³mm³ | Sx 10³mm³ | Iy 10⁶mm⁴ | ry mm | J 10³mm⁴ | φNs kN |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 155CT79.0 | 79.0 | 163.5 | 311 | 25 | 15.7 | 10066 | 15.2 | 114 | 224 | 62.7 | 78.9 | 1798 | 2537 |
| 155CT68.5 | 68.5 | 160.5 | 309 | 21.7 | 13.8 | 8738 | 12.9 | 98.1 | 188 | 53.4 | 78.2 | 1174 | 2202 |
| 155CT59.0 | 59.0 | 157.5 | 307 | 18.7 | 11.9 | 7510 | 10.8 | 82.5 | 156 | 45.1 | 77.5 | 747 | 1892 |
| 155CT48.4 | 48.4 | 154 | 305 | 15.4 | 9.9 | 6186 | 8.59 | 66.6 | 123 | 36.4 | 76.7 | 416 | 1670 |
| 125CT44.8 | 44.8 | 130 | 256 | 17.3 | 10.5 | 5696 | 5.31 | 49.3 | 95.5 | 24.2 | 65.2 | 485 | 1435 |
| 125CT36.5 | 36.5 | 127 | 254 | 14.2 | 8.6 | 4661 | 4.17 | 39.2 | 74.2 | 19.4 | 64.5 | 266 | 1258 |
| 100CT29.8 | 29.8 | 105 | 205 | 14.2 | 9.3 | 3811 | 2.43 | 28.3 | 54.2 | 10.2 | 51.7 | 220 | 1029 |
| 100CT26.1 | 26.1 | 103 | 204 | 12.5 | 8.0 | 3330 | 2.02 | 23.7 | 45.0 | 8.85 | 51.6 | 148 | 899 |
| 100CT23.1 | 23.1 | 101.5 | 203 | 11.0 | 7.3 | 2949 | 1.79 | 21.2 | 39.5 | 7.67 | 51.0 | 102 | 796 |
| 75CT18.6 | 18.6 | 81 | 154 | 11.5 | 8.1 | 2368 | 0.947 | 14.5 | 27.6 | 3.50 | 38.5 | 90.4 | 639 |
| 75CT15.0 | 15.0 | 79 | 153 | 9.4 | 6.6 | 1932 | 0.740 | 11.4 | 21.4 | 2.81 | 38.1 | 49.0 | 556 |
| 75CT11.7 | 11.7 | 76 | 152 | 6.8 | 6.1 | 1490 | 0.606 | 9.83 | 17.6 | 1.99 | 36.6 | 21.2 | 429 |
| 50CT7.4 | 7.40 | 48.5 | 99 | 7.0 | 5.0 | 943 | 0.127 | 3.21 | 6.33 | 0.568 | 24.5 | 13.0 | 272 |
Frequently asked questions
- How is a CT designated?
- By half the parent UC's nominal depth and half its mass: a 100CT23.1 is cut from a 200UC46.2.
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 5131:2016 Structural steelwork – Fabrication and erection
Fabrication, erection, tolerances, inspection and construction categories (CC1–CC4) for structural steelwork.