# Egg crate joint (slot joint, cross halving on edge)

> How deep are the slots in an egg crate joint?

- Category: Joinery › Edge & case joints
- Kind: Hardware
- Basis: Xem Studio design — geometry computed in the generator from traditional proportions
- Page: https://xemstudio.com/objects/egg-crate-joint/ · JSON: https://xemstudio.com/api/geometry?object=egg-crate-joint · Plain text: https://xemstudio.com/objects/egg-crate-joint/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files Xem Studio Design License (free to use and sell from, not to redistribute as files: https://xemstudio.com/license/)
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 80.0 | 80.0 | 60.0 |

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

## Notes

- Woodworking joint drawn for 3D printing: the parts lock together by shape, so a print can be joined without glue or screws. Drawn at true size with the parts line to line (zero gap) in their assembled position — add your printer's fit allowance to the mating faces (your AI or slicer can do this).
- Two boards slotted halfway, one from each edge, so they cross flush — dividers, grids, organisers, and flat-pack frames.

## Sizes

| dimension | value |
|---|---|
| stock | 10 mm boards, 60 mm wide |
| parts | board a, board b |
| slots | 10 mm wide (the board), 30 mm deep (half the width) |
| assembles | B slides down onto A |
| holds | the boards square to each other; makes grids, dividers and box inserts |

## Where the files are

- Xem Studio: [Joinery design (geometry computed in the generator from traditional proportions)](https://xemstudio.com/) — web — Xem Studio design

## Free STEP/STL (3 parts, Xem Studio Design License, Xem Studio)

Index: https://xemstudio.com/files/hardware/egg-crate-joint/index.json · license: https://xemstudio.com/files/hardware/egg-crate-joint/LICENSE.md

- egg-crate-joint-board-a: [STEP](https://xemstudio.com/files/hardware/egg-crate-joint/egg-crate-joint-board-a.step) · [STL](https://xemstudio.com/files/hardware/egg-crate-joint/egg-crate-joint-board-a.stl) — Board slotted from the top, half its width
- egg-crate-joint-board-b: [STEP](https://xemstudio.com/files/hardware/egg-crate-joint/egg-crate-joint-board-b.step) · [STL](https://xemstudio.com/files/hardware/egg-crate-joint/egg-crate-joint-board-b.stl) — Board slotted from the bottom, half its width
- egg-crate-joint-assembled: [STEP](https://xemstudio.com/files/hardware/egg-crate-joint/egg-crate-joint-assembled.step) · [STL](https://xemstudio.com/files/hardware/egg-crate-joint/egg-crate-joint-assembled.stl) — All parts in their assembled position (each part its own solid)

## Questions

**How deep are egg crate slots?**

Half the board width on each board, as wide as the board is thick.

## Fits with

- [Cross lap joint (cross halving)](https://xemstudio.com/objects/cross-lap-joint/)
- [Box joint (finger joint)](https://xemstudio.com/objects/box-joint/)
- [Dado joint (housing joint)](https://xemstudio.com/objects/dado-joint/)