PRODUCT 03.01 · SHS
Square tube 20×20 mm — light rails, mesh frames, door stops.
20×20 mm square hollow section, wall 1.2–3.0 mm, cut, punched and welded to drawing. Seldom structural, often the thing that stops a door rattling.
Steel sections, mill hallTianjin mill
The 20×20 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 | 0.87 | 5.2 | 10.5 |
| 2.0 mm | 1.13 | 6.8 | 13.6 |
| 2.5 mm | 1.37 | 8.2 | 16.5 |
4 × (side − wall) × wall × 0.00785, nominal before corner-radius correction.
20×20 SHS — order specificationXY-SQ-20
- Section
- 20 × 20 mm
- Wall
- 1.5 / 2.0 / 2.5 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
- light rails, mesh frames, door stops
- 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 20×20 SHS for your frame
Send lengths, wall, and whether the pieces are punched or welded. Fabrication is quoted per piece, not per metre.