Aluminium rectangular tube 70 × 40 × 3 mm
It weighs 1.685 kg per metre: a 6 m length weighs 10.11 kg. Here you have the drawing, the dimensions and the weight for different numbers of lengths.
- Code
- 7247
- Type
- Rectangular tube
- Dimensions (mm)
- A70B40C3
- Weight per metre
- 1.685 kg/m
- 6 m length
- 10.11 kg
- Metres per kilo
- 0.59 m
- Equivalent cross-section
- 624.3 mm²
- How it is measured
- A and B are the outside sides; C is the wall thickness.
How much do the lengths weigh?
| 6 m lengths | 1 | 5 | 10 | 25 | 50 | 100 |
|---|---|---|---|---|---|---|
| Weight | 10.11 kg | 50.55 kg | 101.1 kg | 252.8 kg | 505.5 kg | 1,011 kg |
| Metres | 6 m | 30 m | 60 m | 150 m | 300 m | 600 m |
How much load does the 70 × 40 × 3 rectangular tube take?
Supported at both ends, with the load at midspan: how many kilos it takes before it bends more than 1/200 of the span (what windows and light structures usually accept) or goes past the elastic limit of 6063-T5 aluminium.
| Span | 0.5 m | 1 m | 1.5 m | 2 m |
|---|---|---|---|---|
| Upright (70 mm high) | 1,215 kg* | 605 kg* | 300 kg | 170 kg |
| Flat (40 mm high) | 870 kg* | 275 kg | 125 kg | 69 kg |
Moment of inertia 40.06 cm⁴ upright · 16.37 cm⁴ flat; section modulus 11.45 cm³ upright · 8.19 cm³ flat. * Here the strength of the material governs, not the deflection. A guidance calculation for a straight beam with sharp corners, E = 69 GPa, without its own weight or buckling of thin walls: for a structure, the check must be done by an engineer.
Need this profile?
Ask about availability, alloy, temper and finish, work out the kilos for your order or how many lengths you need for your cuts.
Other sizes of rectangular tubes
Data from the Perfiles de Aluminio standard profile catalogue, 2026 edition, published with its permission. The weight per metre is the one declared by the manufacturer; the actual weight may vary within the tolerances of the standard. The equivalent cross-section is calculated with a density of 2.699 g/cm³. Standard length: 6 m.