# Aluminum I-beams (Aluminum Association standard): 3 x 1.64 to 12 x 14.29 dimensions + STEP/STL

> What are the dimensions of an aluminum 6 x 4.03 I-beam?

- Category: Hardware › Framing
- Kind: Standard part
- Basis: Aluminum Association standard I-beams: depth, width, flange, web, fillet radius, area
- Page: https://xemstudio.com/objects/aluminum-i-beams/ · JSON: https://xemstudio.com/api/geometry?object=aluminum-i-beams · Plain text: https://xemstudio.com/objects/aluminum-i-beams/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 |
|---|
| 101.6 |

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

## Notes

- Aluminum Association standard I-beams are named depth x weight: 6 x 4.03 is a 6 in deep beam weighing 4.03 lb per foot. Flanges are parallel and constant thickness.
- Dimensions and the printed fillet radius R at the four web-flange corners are from the Engineers Edge table of standard aluminum I-beams (the page names no author; the sizes and areas agree with the Aluminum Association series). Flange tips are drawn square. Drawn area is within 5 % of the printed area on every size.
- Files are 4 in (101.6 mm) long along X, centred on y = 0, z = 0 on the bottom face. Designations round the printed weight to two decimals.

## Sizes

| designation | lb/ft | depth (in) | width (in) | flange (in) | web (in) | fillet R (in) | area (in2) | depth (mm) | width (mm) |
|---|---|---|---|---|---|---|---|---|---|
| 3 x 1.64 | 1.637 | 3.0 | 2.5 | 0.2 | 0.13 | 0.25 | 1.392 | 76.2 | 63.5 |
| 3 x 2.03 | 2.03 | 3.0 | 2.5 | 0.26 | 0.15 | 0.25 | 1.726 | 76.2 | 63.5 |
| 4 x 2.31 | 2.311 | 4.0 | 3.0 | 0.23 | 0.15 | 0.25 | 1.965 | 101.6 | 76.2 |
| 4 x 2.79 | 2.793 | 4.0 | 3.0 | 0.29 | 0.17 | 0.25 | 2.375 | 101.6 | 76.2 |
| 5 x 3.70 | 3.7 | 5.0 | 3.5 | 0.32 | 0.19 | 0.3 | 3.146 | 127.0 | 88.9 |
| 6 x 4.03 | 4.03 | 6.0 | 4.0 | 0.29 | 0.19 | 0.3 | 3.427 | 152.4 | 101.6 |
| 6 x 4.69 | 4.692 | 6.0 | 4.0 | 0.35 | 0.21 | 0.3 | 3.99 | 152.4 | 101.6 |
| 7 x 5.80 | 5.8 | 7.0 | 4.5 | 0.38 | 0.23 | 0.3 | 4.932 | 177.8 | 114.3 |
| 8 x 6.18 | 6.181 | 8.0 | 5.0 | 0.35 | 0.23 | 0.3 | 5.256 | 203.2 | 127.0 |
| 8 x 7.02 | 7.023 | 8.0 | 5.0 | 0.41 | 0.25 | 0.3 | 5.972 | 203.2 | 127.0 |
| 9 x 8.36 | 8.361 | 9.0 | 5.5 | 0.44 | 0.27 | 0.3 | 7.11 | 228.6 | 139.7 |
| 10 x 8.65 | 8.646 | 10.0 | 6.0 | 0.41 | 0.25 | 0.4 | 7.352 | 254.0 | 152.4 |
| 10 x 10.29 | 10.286 | 10.0 | 6.0 | 0.5 | 0.29 | 0.4 | 8.747 | 254.0 | 152.4 |
| 12 x 11.67 | 11.672 | 12.0 | 7.0 | 0.47 | 0.29 | 0.4 | 9.925 | 304.8 | 177.8 |
| 12 x 14.29 | 14.292 | 12.0 | 7.0 | 0.62 | 0.31 | 0.4 | 12.153 | 304.8 | 177.8 |

## Where the files are

- Engineers Edge: [Standard Aluminum I-Beam size table: depth, width, weight, area, flange, web, fillet radius](https://engineersedge.com/I_beams_aluminum.htm) — web — The page names no author; the sizes match the Aluminum Association standard I-beams and the area check below agrees

## Free STEP/STL (15 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/aluminum-i-beams/index.json

- i-3x1-64-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-3x1-64-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-3x1-64-4in.stl) — Aluminum I-beam 3 x 1.64: depth 3 in, flange width 2.5 in, flange 0.2 in, web 0.13 in, fillet R 0.25 in, 4 in long
- i-3x2-03-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-3x2-03-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-3x2-03-4in.stl) — Aluminum I-beam 3 x 2.03: depth 3 in, flange width 2.5 in, flange 0.26 in, web 0.15 in, fillet R 0.25 in, 4 in long
- i-4x2-31-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-4x2-31-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-4x2-31-4in.stl) — Aluminum I-beam 4 x 2.31: depth 4 in, flange width 3 in, flange 0.23 in, web 0.15 in, fillet R 0.25 in, 4 in long
- i-4x2-79-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-4x2-79-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-4x2-79-4in.stl) — Aluminum I-beam 4 x 2.79: depth 4 in, flange width 3 in, flange 0.29 in, web 0.17 in, fillet R 0.25 in, 4 in long
- i-5x3-70-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-5x3-70-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-5x3-70-4in.stl) — Aluminum I-beam 5 x 3.70: depth 5 in, flange width 3.5 in, flange 0.32 in, web 0.19 in, fillet R 0.3 in, 4 in long
- i-6x4-03-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-6x4-03-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-6x4-03-4in.stl) — Aluminum I-beam 6 x 4.03: depth 6 in, flange width 4 in, flange 0.29 in, web 0.19 in, fillet R 0.3 in, 4 in long
- i-6x4-69-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-6x4-69-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-6x4-69-4in.stl) — Aluminum I-beam 6 x 4.69: depth 6 in, flange width 4 in, flange 0.35 in, web 0.21 in, fillet R 0.3 in, 4 in long
- i-7x5-80-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-7x5-80-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-7x5-80-4in.stl) — Aluminum I-beam 7 x 5.80: depth 7 in, flange width 4.5 in, flange 0.38 in, web 0.23 in, fillet R 0.3 in, 4 in long
- i-8x6-18-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-8x6-18-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-8x6-18-4in.stl) — Aluminum I-beam 8 x 6.18: depth 8 in, flange width 5 in, flange 0.35 in, web 0.23 in, fillet R 0.3 in, 4 in long
- i-8x7-02-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-8x7-02-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-8x7-02-4in.stl) — Aluminum I-beam 8 x 7.02: depth 8 in, flange width 5 in, flange 0.41 in, web 0.25 in, fillet R 0.3 in, 4 in long
- i-9x8-36-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-9x8-36-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-9x8-36-4in.stl) — Aluminum I-beam 9 x 8.36: depth 9 in, flange width 5.5 in, flange 0.44 in, web 0.27 in, fillet R 0.3 in, 4 in long
- i-10x8-65-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-10x8-65-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-10x8-65-4in.stl) — Aluminum I-beam 10 x 8.65: depth 10 in, flange width 6 in, flange 0.41 in, web 0.25 in, fillet R 0.4 in, 4 in long
- i-10x10-29-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-10x10-29-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-10x10-29-4in.stl) — Aluminum I-beam 10 x 10.29: depth 10 in, flange width 6 in, flange 0.5 in, web 0.29 in, fillet R 0.4 in, 4 in long
- i-12x11-67-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-12x11-67-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-12x11-67-4in.stl) — Aluminum I-beam 12 x 11.67: depth 12 in, flange width 7 in, flange 0.47 in, web 0.29 in, fillet R 0.4 in, 4 in long
- i-12x14-29-4in: [STEP](https://xemstudio.com/files/hardware/aluminum-i-beams/i-12x14-29-4in.step) · [STL](https://xemstudio.com/files/hardware/aluminum-i-beams/i-12x14-29-4in.stl) — Aluminum I-beam 12 x 14.29: depth 12 in, flange width 7 in, flange 0.62 in, web 0.31 in, fillet R 0.4 in, 4 in long

## Questions

**What does 6 x 4.03 mean for an aluminum I-beam?**

A 6 in deep Aluminum Association I-beam weighing 4.03 lb per foot.

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