# Lessons — mechanical

Printed parts: strength, printability, fasteners and the enclosure's own features.

```mermaid
flowchart TD
    D["design-rules.md<br/>the shape of each part"] --> F["fasteners-and-assembly-access.md<br/>how the parts go together"]
    D --> E["enclosure-features.md<br/>what the enclosure carries"]
    classDef here fill:#fffdf5,stroke:#173d3c,color:#173d3c
    classDef near fill:#eef1e4,stroke:#6f8a80,color:#173d3c
    classDef out fill:#ffe1cc,stroke:#bd3a12,color:#173d3c
    class D,F,E here
```

| File | Lessons on |
|---|---|
| [design-rules.md](design-rules.md) | Strength, printability, landings, reliefs, windows, grilles, shell |
| [fasteners-and-assembly-access.md](fasteners-and-assembly-access.md) | Tool access, assembly order, screw length, inserts, drive screws |
| [enclosure-features.md](enclosure-features.md) | Antennas, service pins, storage trays, mount plate, cap, power budget |

Each lesson follows the [lesson format](../README.md#lesson-format): a rule, the incident, a check and its source. Back to [all lessons](../README.md).