# Cantilever shelf plates for 15-series posts: 8 to 16 in reach

> How do I hang a shelf off a single 1515 post?

- Category: Hardware › Framing
- Kind: Hardware
- Basis: Xem Studio design: a ¼ in triangular plate: its vertical leg bolts to the post, its top edge carries a 1515 shelf rail; 5/16-18 holes on the rail centre lines
- Page: https://xemstudio.com/objects/t-slot-cantilever-shelf-plates/ · JSON: https://xemstudio.com/api/geometry?object=t-slot-cantilever-shelf-plates · Plain text: https://xemstudio.com/objects/t-slot-cantilever-shelf-plates/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

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

## Notes

- One plate each side of the rail, or one on the outside; the rail then carries a shelf board.

## Sizes

| reach_in | plate_in | holes |
|---|---|---|
| 8 | 0.25 | 5 |
| 10 | 0.25 | 5 |
| 12 | 0.25 | 5 |
| 16 | 0.25 | 5 |

## Where the files are

- 80/20: [15 series T-slot profiles and fasteners (1.5 in rail, 5/16-18 hardware)](https://8020.net/1515.html) — web — maker's catalogue; numbers cited

## Free STEP/STL (4 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/t-slot-cantilever-shelf-plates/index.json

- cantilever-plate-8in: [STEP](https://xemstudio.com/files/hardware/t-slot-cantilever-shelf-plates/cantilever-plate-8in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-cantilever-shelf-plates/cantilever-plate-8in.stl) — 8 in cantilever shelf plate, ¼ in thick: two holes on the post, three under the shelf rail (5 Ø8.73)
- cantilever-plate-10in: [STEP](https://xemstudio.com/files/hardware/t-slot-cantilever-shelf-plates/cantilever-plate-10in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-cantilever-shelf-plates/cantilever-plate-10in.stl) — 10 in cantilever shelf plate, ¼ in thick: two holes on the post, three under the shelf rail (5 Ø8.73)
- cantilever-plate-12in: [STEP](https://xemstudio.com/files/hardware/t-slot-cantilever-shelf-plates/cantilever-plate-12in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-cantilever-shelf-plates/cantilever-plate-12in.stl) — 12 in cantilever shelf plate, ¼ in thick: two holes on the post, three under the shelf rail (5 Ø8.73)
- cantilever-plate-16in: [STEP](https://xemstudio.com/files/hardware/t-slot-cantilever-shelf-plates/cantilever-plate-16in.step) · [STL](https://xemstudio.com/files/hardware/t-slot-cantilever-shelf-plates/cantilever-plate-16in.stl) — 16 in cantilever shelf plate, ¼ in thick: two holes on the post, three under the shelf rail (5 Ø8.73)

## Questions

**Load?**

Depends on the plate material: print it for light duty or cut it from ¼ in aluminium plate.

## Fits with

- [1515 T-slot extrusion, 1.5 × 1.5 in (15-series inch)](https://xemstudio.com/objects/1515-t-slot-extrusion-inch/)
- [Slide-in T-nuts for 20, 30, 40, 45 mm and 1 in, 1.5 in T-slot extrusion](https://xemstudio.com/objects/slide-in-t-nuts/)
- [Socket head cap screws, inch: #10-24, #10-32, 5/16-18, 3/8-16, 1/2-13 (ASME B18.3)](https://xemstudio.com/objects/socket-head-cap-screws-inch/)
- [Button head socket cap screws, inch: #4-40 to 1/2-13 (ASME B18.3)](https://xemstudio.com/objects/button-head-socket-screws-inch/)
- [L corner brackets for 20, 30, 40, 45 mm and 1 in, 1.5 in T-slot extrusion](https://xemstudio.com/objects/t-slot-corner-brackets/)