# HUB Upgrade 3

> Canonical source: [HUB Upgrade 3](https://satisfactorybase.com/wiki/schematics/hub-upgrade-3)
> Language: en

## Properties

- Entity type: Milestone
- Tier: 0

## Unlock cost

- [Iron Plate](/wiki/items/iron-plate): 20
- [Iron Rod](/wiki/items/iron-rod): 20
- [Wire](/wiki/items/wire): 20

## Prerequisites

- [HUB Upgrade 2](/wiki/schematics/hub-upgrade-2)

## Unlocked recipes

- [Concrete](/wiki/recipes/recipe-concrete-c)
- [Screws](/wiki/recipes/recipe-screw-c)
- [Reinforced Iron Plate](/wiki/recipes/recipe-ironplatereinforced-c)

## Unlocked buildings

- [Constructor](/wiki/buildings/constructor)
- [Power Pole Mk.1](/wiki/buildings/power-pole-mk-1)

## Scanner unlocks

- [Limestone](/wiki/items/limestone)

## Technical Details

- Class name: Schematic_Tutorial2_C
- Native class: FGSchematic
- Asset path: /Game/FactoryGame/Schematics/Tutorial/Schematic_Tutorial2