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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)? · 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
Also called: rectangular hollow section, rectangular hollow section dimensions, rhs, rhs dimensions, rhs sizes, rhs steel, rhs box section, box section, box section steel, rectangular tube, rectangular tube dimensions metric, rectangular steel tube sizes mm, hss rectangular metric, en 10219 rhs, en 10219 rectangular, rhs corner radius, rhs weight per metre, rhs step file, rhs stl, steel box section sizes, rhs
Exact dimensions. True size, with no printing tolerance added.
- length
- 100.0 mm
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.
RHS rectangular hollow sections (EN 10219): 40x20, 60x40x4, 100x50x5… size chart
| 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
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Roymech | Rectangular Hollow Sections, cold formed, BS EN 10219:1997: H, B, t, ro, ri, mass per metre, area | 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) | 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 | 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) | STEP, IGES, PDF | McMaster-Carr site terms: personal design use, no redistribution verify |
Free files
★ Free files 18 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| rhs-40x20x2-100mm | 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 | STEP · STL |
| rhs-40x20x3-100mm | 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 | STEP · STL |
| rhs-50x30x3-100mm | 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 | STEP · STL |
| rhs-60x40x3-100mm | 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 | STEP · STL |
| rhs-60x40x4-100mm | 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 | STEP · STL |
| rhs-80x40x3-100mm | 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 | STEP · STL |
| rhs-80x40x4-100mm | 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 | STEP · STL |
| rhs-80x60x4-100mm | 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 | STEP · STL |
| rhs-90x50x4-100mm | 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 | STEP · STL |
| rhs-100x50x3-100mm | 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 | STEP · STL |
| rhs-100x50x4-100mm | 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 | STEP · STL |
| rhs-100x50x5-100mm | 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 | STEP · STL |
| rhs-100x50x6-3-100mm | 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 | STEP · STL |
| rhs-100x60x4-100mm | 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 | STEP · STL |
| rhs-100x60x5-100mm | 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 | STEP · STL |
| rhs-100x80x4-100mm | 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 | STEP · STL |
| rhs-100x80x5-100mm | 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 | STEP · STL |
| rhs-100x80x6-3-100mm | 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 | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=en-10219-rhs-rectangular-hollow-sections

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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.