# RHS rectangular hollow sections (EN 10219): 40x20, 60x40x4, 100x50x5 box section dimensions + STEP/STL

> What are the dimensions of RHS 100x50x4 rectangular hollow section (wall, corner radius, kg/m)?

- Category: Hardware › Framing
- Kind: Standard part
- Basis: Roymech cold-formed hollow section tables (BS EN 10219:1997 values: size, wall, outside and inside radius, mass, area); radius band from EN 10219-2 as quoted by two mills
- Page: https://xemstudio.com/objects/en-10219-rhs-rectangular-hollow-sections/ · JSON: https://xemstudio.com/api/geometry?object=en-10219-rhs-rectangular-hollow-sections · Plain text: https://xemstudio.com/objects/en-10219-rhs-rectangular-hollow-sections/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length |
|---|
| 100.0 |

**Exact dimensions.** True size, with no tolerance added.

## Notes

- RHS (rectangular hollow section, also called rectangular tube or box section) to EN 10219: designation H x B x t, H the long outside side, B the short side, t the wall, all in mm. The same tube is sold in the US as rectangular HSS (aisc-hss-rectangular-square) in inch sizes.
- Corner radius: EN 10219-2 gives a band for the outside radius, 1.6t to 2.4t for walls up to 6 mm, 2.0t to 3.0t for 6 to 10 mm, 2.4t to 3.6t above 10 mm (Nippon Steel Kenzai and the Ozdemir Boru declaration both print it). The radii in the table and the files are the Roymech section-table values, the middle of each band: 2t up to 6 mm wall, 2.5t at 6.3 and 8 mm, 3t at 12 mm and over, with inside radius = outside radius minus the wall. A real tube from one mill can sit anywhere in the band.
- Sizes: every row of the Roymech table with H up to 100 mm (58 sizes). The table goes to 400 x 300 mm; larger sizes are not listed here.
- Files: 18 sizes drawn as 100 mm long extrusions along X, B across (y), H up (z), z = 0 on the bottom face. Each drawn section area matches the printed area within 1.5 %; the table check also confirms mass = 0.785 kg/m per cm2 within 1.5 % and ro - ri = t on every row.
- Nominal dimensions only: EN 10219-2 tolerances on size, wall (-10 %), squareness and corner radius are not applied.
- McMaster-Carr's metric rectangular tube (12, 25, 40, 50, 55, 100 mm) is EN 10305-5 precision tube, not EN 10219; it is linked as a CAD source, not as an equivalent.

## Sizes

| designation (H x B x t, mm) | H (mm) | B (mm) | t (mm) | outside radius ro (mm) | inside radius ri (mm) | ro / t | mass (kg/m) | area (cm2) |
|---|---|---|---|---|---|---|---|---|
| 40x20x2 | 40 | 20 | 2 | 4 | 2 | 2 | 1.68 | 2.14 |
| 40x20x2.5 | 40 | 20 | 2.5 | 5 | 2.5 | 2 | 2.03 | 2.59 |
| 40x20x3 | 40 | 20 | 3 | 6 | 3 | 2 | 2.36 | 3.01 |
| 50x25x2 | 50 | 25 | 2 | 4 | 2 | 2 | 2.15 | 2.74 |
| 50x25x2.5 | 50 | 25 | 2.5 | 5 | 2.5 | 2 | 2.62 | 3.34 |
| 50x25x3 | 50 | 25 | 3 | 6 | 3 | 2 | 3.07 | 3.91 |
| 50x30x2 | 50 | 30 | 2 | 4 | 2 | 2 | 2.31 | 2.94 |
| 50x30x2.5 | 50 | 30 | 2.5 | 5 | 2.5 | 2 | 2.82 | 3.59 |
| 50x30x3 | 50 | 30 | 3 | 6 | 3 | 2 | 3.3 | 4.21 |
| 50x30x4 | 50 | 30 | 4 | 8 | 4 | 2 | 4.2 | 5.35 |
| 60x40x2 | 60 | 40 | 2 | 4 | 2 | 2 | 2.93 | 3.74 |
| 60x40x2.5 | 60 | 40 | 2.5 | 5 | 2.5 | 2 | 3.6 | 4.59 |
| 60x40x3 | 60 | 40 | 3 | 6 | 3 | 2 | 4.25 | 5.41 |
| 60x40x4 | 60 | 40 | 4 | 8 | 4 | 2 | 5.45 | 6.95 |
| 60x40x5 | 60 | 40 | 5 | 10 | 5 | 2 | 6.56 | 8.36 |
| 70x50x2 | 70 | 50 | 2 | 4 | 2 | 2 | 3.56 | 4.54 |
| 70x50x2.5 | 70 | 50 | 2.5 | 5 | 2.5 | 2 | 4.39 | 5.59 |
| 70x50x3 | 70 | 50 | 3 | 6 | 3 | 2 | 5.19 | 6.61 |
| 70x50x4 | 70 | 50 | 4 | 8 | 4 | 2 | 6.71 | 8.55 |
| 70x50x5 | 70 | 50 | 5 | 10 | 5 | 2 | 8.13 | 10.4 |
| 80x40x2 | 80 | 40 | 2 | 4 | 2 | 2 | 3.56 | 4.54 |
| 80x40x2.5 | 80 | 40 | 2.5 | 5 | 2.5 | 2 | 4.39 | 5.59 |
| 80x40x3 | 80 | 40 | 3 | 6 | 3 | 2 | 5.19 | 6.61 |
| 80x40x4 | 80 | 40 | 4 | 8 | 4 | 2 | 6.71 | 8.55 |
| 80x40x5 | 80 | 40 | 5 | 10 | 5 | 2 | 8.13 | 10.4 |
| 80x60x2 | 80 | 60 | 2 | 4 | 2 | 2 | 4.19 | 5.34 |
| 80x60x2.5 | 80 | 60 | 2.5 | 5 | 2.5 | 2 | 5.17 | 6.59 |
| 80x60x3 | 80 | 60 | 3 | 6 | 3 | 2 | 6.13 | 7.81 |
| 80x60x4 | 80 | 60 | 4 | 8 | 4 | 2 | 7.97 | 10.1 |
| 80x60x5 | 80 | 60 | 5 | 10 | 5 | 2 | 9.7 | 12.4 |
| 90x50x2 | 90 | 50 | 2 | 4 | 2 | 2 | 4.19 | 5.34 |
| 90x50x2.5 | 90 | 50 | 2.5 | 5 | 2.5 | 2 | 5.17 | 6.59 |
| 90x50x3 | 90 | 50 | 3 | 6 | 3 | 2 | 6.13 | 7.81 |
| 90x50x3.6 | 90 | 50 | 3.6 | 7.2 | 3.6 | 2 | 7.24 | 9.23 |
| 90x50x4 | 90 | 50 | 4 | 8 | 4 | 2 | 7.97 | 10.1 |
| 90x50x5 | 90 | 50 | 5 | 10 | 5 | 2 | 9.7 | 12.4 |
| 100x40x2.5 | 100 | 40 | 2.5 | 5 | 2.5 | 2 | 5.17 | 6.59 |
| 100x40x3 | 100 | 40 | 3 | 6 | 3 | 2 | 6.13 | 7.81 |
| 100x40x4 | 100 | 40 | 4 | 8 | 4 | 2 | 7.97 | 10.1 |
| 100x40x5 | 100 | 40 | 5 | 10 | 5 | 2 | 9.7 | 12.4 |
| 100x50x2.5 | 100 | 50 | 2.5 | 5 | 2.5 | 2 | 5.56 | 7.09 |
| 100x50x3 | 100 | 50 | 3 | 6 | 3 | 2 | 6.6 | 8.41 |
| 100x50x4 | 100 | 50 | 4 | 8 | 4 | 2 | 8.59 | 10.9 |
| 100x50x5 | 100 | 50 | 5 | 10 | 5 | 2 | 10.5 | 13.4 |
| 100x50x6 | 100 | 50 | 6 | 12 | 6 | 2 | 12.3 | 15.6 |
| 100x50x6.3 | 100 | 50 | 6.3 | 15.75 | 9.45 | 2.5 | 12.5 | 15.9 |
| 100x60x3 | 100 | 60 | 3 | 6 | 3 | 2 | 7.07 | 9.01 |
| 100x60x3.6 | 100 | 60 | 3.6 | 7.2 | 3.6 | 2 | 8.37 | 10.7 |
| 100x60x4 | 100 | 60 | 4 | 8 | 4 | 2 | 9.22 | 11.7 |
| 100x60x5 | 100 | 60 | 5 | 10 | 5 | 2 | 11.3 | 14.4 |
| 100x60x6 | 100 | 60 | 6 | 12 | 6 | 2 | 13.2 | 16.8 |
| 100x60x6.3 | 100 | 60 | 6.3 | 15.75 | 9.45 | 2.5 | 13.5 | 17.2 |
| 100x80x2.5 | 100 | 80 | 2.5 | 5 | 2.5 | 2 | 6.74 | 8.59 |
| 100x80x3 | 100 | 80 | 3 | 6 | 3 | 2 | 8.01 | 10.2 |
| 100x80x4 | 100 | 80 | 4 | 8 | 4 | 2 | 10.5 | 13.3 |
| 100x80x5 | 100 | 80 | 5 | 10 | 5 | 2 | 12.8 | 16.4 |
| 100x80x6 | 100 | 80 | 6 | 12 | 6 | 2 | 15.1 | 19.2 |
| 100x80x6.3 | 100 | 80 | 6.3 | 15.75 | 9.45 | 2.5 | 15.5 | 19.7 |

## Where the files are

- Roymech: [Rectangular Hollow Sections, cold formed, BS EN 10219:1997: H, B, t, ro, ri, mass per metre, area](https://roymech.org/Useful_Tables/Sections/RHS_cf.html) — web — Dimensions and section data are facts; page says to check the standard for status
- Nippon Steel Kenzai: [Hollow sections to EN 10219: external corner radius 1.6t-2.4t (t <= 6 mm), 2.0t-3.0t (6 < t <= 10), 2.4t-3.6t (t > 10)](https://ns-kenzai.co.jp/english/021hollow_section_EN.html) — web — Publisher's page; dimensions are facts
- Ozdemir Boru (EN 10219 declaration of performance): [EN 10219 table 1: external corner profile R = 1.6T-2.4T / 2.0T-3.0T / 2.4T-3.6T by thickness range](https://classic.lemu.dk/mediacdn/20160510075515/public/media/files/ydeevneerklaeringer/roer/ozdemir-boru/ozdemir_boru_en10219.pdf) — web — Publisher's page; dimensions are facts
- McMaster-Carr: [Low-carbon steel rectangular tubes (ASTM A513 / A500; metric EN 10305-5) (free STEP/IGES per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/low-carbon-steel-rectangular-tubes) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link)

## Free STEP/STL (18 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/index.json

- rhs-40x20x2-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-40x20x2-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-40x20x2-100mm.stl) — RHS 40x20x2: 40 x 20 mm outside, wall 2 mm, outside corner radius 4 mm, inside radius 2 mm, 1.68 kg/m, 100 mm long
- rhs-40x20x3-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-40x20x3-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-40x20x3-100mm.stl) — RHS 40x20x3: 40 x 20 mm outside, wall 3 mm, outside corner radius 6 mm, inside radius 3 mm, 2.36 kg/m, 100 mm long
- rhs-50x30x3-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-50x30x3-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-50x30x3-100mm.stl) — RHS 50x30x3: 50 x 30 mm outside, wall 3 mm, outside corner radius 6 mm, inside radius 3 mm, 3.3 kg/m, 100 mm long
- rhs-60x40x3-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-60x40x3-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-60x40x3-100mm.stl) — RHS 60x40x3: 60 x 40 mm outside, wall 3 mm, outside corner radius 6 mm, inside radius 3 mm, 4.25 kg/m, 100 mm long
- rhs-60x40x4-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-60x40x4-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-60x40x4-100mm.stl) — RHS 60x40x4: 60 x 40 mm outside, wall 4 mm, outside corner radius 8 mm, inside radius 4 mm, 5.45 kg/m, 100 mm long
- rhs-80x40x3-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-80x40x3-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-80x40x3-100mm.stl) — RHS 80x40x3: 80 x 40 mm outside, wall 3 mm, outside corner radius 6 mm, inside radius 3 mm, 5.19 kg/m, 100 mm long
- rhs-80x40x4-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-80x40x4-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-80x40x4-100mm.stl) — RHS 80x40x4: 80 x 40 mm outside, wall 4 mm, outside corner radius 8 mm, inside radius 4 mm, 6.71 kg/m, 100 mm long
- rhs-80x60x4-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-80x60x4-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-80x60x4-100mm.stl) — RHS 80x60x4: 80 x 60 mm outside, wall 4 mm, outside corner radius 8 mm, inside radius 4 mm, 7.97 kg/m, 100 mm long
- rhs-90x50x4-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-90x50x4-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-90x50x4-100mm.stl) — RHS 90x50x4: 90 x 50 mm outside, wall 4 mm, outside corner radius 8 mm, inside radius 4 mm, 7.97 kg/m, 100 mm long
- rhs-100x50x3-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x50x3-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x50x3-100mm.stl) — RHS 100x50x3: 100 x 50 mm outside, wall 3 mm, outside corner radius 6 mm, inside radius 3 mm, 6.6 kg/m, 100 mm long
- rhs-100x50x4-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x50x4-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x50x4-100mm.stl) — RHS 100x50x4: 100 x 50 mm outside, wall 4 mm, outside corner radius 8 mm, inside radius 4 mm, 8.59 kg/m, 100 mm long
- rhs-100x50x5-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x50x5-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x50x5-100mm.stl) — RHS 100x50x5: 100 x 50 mm outside, wall 5 mm, outside corner radius 10 mm, inside radius 5 mm, 10.5 kg/m, 100 mm long
- rhs-100x50x6-3-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x50x6-3-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x50x6-3-100mm.stl) — RHS 100x50x6.3: 100 x 50 mm outside, wall 6.3 mm, outside corner radius 15.75 mm, inside radius 9.45 mm, 12.5 kg/m, 100 mm long
- rhs-100x60x4-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x60x4-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x60x4-100mm.stl) — RHS 100x60x4: 100 x 60 mm outside, wall 4 mm, outside corner radius 8 mm, inside radius 4 mm, 9.22 kg/m, 100 mm long
- rhs-100x60x5-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x60x5-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x60x5-100mm.stl) — RHS 100x60x5: 100 x 60 mm outside, wall 5 mm, outside corner radius 10 mm, inside radius 5 mm, 11.3 kg/m, 100 mm long
- rhs-100x80x4-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x80x4-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x80x4-100mm.stl) — RHS 100x80x4: 100 x 80 mm outside, wall 4 mm, outside corner radius 8 mm, inside radius 4 mm, 10.5 kg/m, 100 mm long
- rhs-100x80x5-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x80x5-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x80x5-100mm.stl) — RHS 100x80x5: 100 x 80 mm outside, wall 5 mm, outside corner radius 10 mm, inside radius 5 mm, 12.8 kg/m, 100 mm long
- rhs-100x80x6-3-100mm: [STEP](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x80x6-3-100mm.step) · [STL](https://xemstudio.com/files/hardware/en-10219-rhs-rectangular-hollow-sections/rhs-100x80x6-3-100mm.stl) — RHS 100x80x6.3: 100 x 80 mm outside, wall 6.3 mm, outside corner radius 15.75 mm, inside radius 9.45 mm, 15.5 kg/m, 100 mm long

## Questions

**What is RHS?**

Rectangular hollow section: cold-formed steel tube with a rectangular cross-section, sized H x B x t in mm to EN 10219 (structural) - the US equivalent is rectangular HSS.

**What is the corner radius of RHS 100x50x4?**

Outside 8 mm (2t), inside 4 mm in the Roymech EN 10219 table; the standard allows 1.6t to 2.4t outside for walls up to 6 mm.

**How heavy is RHS 100x50x4?**

8.59 kg/m, section area 10.9 cm2.

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