PRODUCT 03.04 · SHS
Square tube 40×40 mm — truss chords, heavy door frames, machine guards.
40×40 mm square hollow section, wall 1.2–3.0 mm, cut, punched and welded to drawing. Where a truss chord needs a flat face for bolts.
Round tube bundles, stacked in the millTianjin mill
The 40×40 SHS is chosen for its corner stiffness and its flat faces. If the member is a column, check the base detail at the same time: a square post on a flat base plate with four bolts behaves very differently from the same post driven into soil.
| Wall | kg/m | 6 m length (kg) | 12 m length (kg) |
|---|---|---|---|
| 1.5 mm | 1.81 | 10.9 | 21.8 |
| 2.0 mm | 2.39 | 14.3 | 28.6 |
| 2.5 mm | 2.94 | 17.7 | 35.3 |
| 3.0 mm | 3.49 | 20.9 | 41.8 |
4 × (side − wall) × wall × 0.00785, nominal before corner-radius correction.
40×40 SHS — order specificationXY-SQ-40
- Section
- 40 × 40 mm
- Wall
- 1.5 / 2.0 / 2.5 / 3.0 mm
- Length
- 6 m / 12 m / cut to order
- Grade
- Q235B · Q355B
- Standard
- EN 10219
- Coating
- Z275 / hot-dip ISO 1461
- Fabrication
- punched / welded / mitred
- Packing
- square bundle
- Typical use
- truss chords, heavy door frames, machine guards
- Corner radius
- 1.5–2.5 t
- Cut tolerance
- ±1 mm
- Loading
- 40HQ
Indicative values — the quotation and mill certificate carry the final figures.Rev. 2026-11
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Quote 40×40 SHS for your frame
Send lengths, wall, and whether the pieces are punched or welded. Fabrication is quoted per piece, not per metre.