# Finch 101: Generate Corridor

{% embed url="<https://www.youtube.com/watch?v=_fyksqtuT0c>" %}

### 1. Open the Floor Plate Editor

Open the **Finch Sample Project**, variant `3 Custom Core`.

#### Steps:

1. Double-click on any floor.
2. The **2D floor plate editor** opens.
3. Use the **story slider** to scroll between floors.

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### 2. Add a Centerline (for Corridor Placement)

Finch uses a **centerline** to determine where to place corridors. This can be:

* Drawn in Rhino/Revit (before uploading), or
* Drawn directly in Finch.

To **edit or draw centerlines**:

* Select the **Edit icon**
* Click twice on an endpoint to adjust the shape
* Use the **line tool** to draw a new one if needed

**Tip**: *Dragging the entire line (instead of just an endpoint) can misalign your corridor. Always click twice on the endpoint before adjusting.*

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### 3. Generate Corridor and Cores

With the centerline in place:

* Click on the floor plate
* Select **“Generate Unit Mix and Corridors”**

This will trigger Finch’s corridor and core algorithm.

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### 4. Adjust Generation Parameters

Use the **left-hand panel** to guide Finch’s generation logic:

#### Stairwells (Cores)

* Set **number of stairwells** (e.g., 2–4)
* Choose **placement behavior**:
  * Place stairwells in **corners**
  * Place stairwells on **ends**

#### Egress Distances

* **Single exit max**: e.g., 18 meters
* **Multiple exits max**: e.g., 30 meters

🟢 Green = compliant\
⚪️ Grey = compliant for multiple exits\
🔴 Red = non-compliant

Finch updates the layout **in real time** as you adjust these settings.

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### 5. Define Core Dimensions

Set the following in the **Dimensions** section:

* **Core width**
* **Core depth** (includes corridor)

Example:

* Corridor width: 2m
* Core depth: 5m\
  → Set **core depth to 7m**

Use zoom to verify visual fit with your floor plate.

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### 6. Adjust Stairwell Attractors

Stairwell attractors define which direction your stairwells face:

* Turn on/off at**tractor arrows**
* Set them to point **inward** (e.g., toward a courtyard) or **outward** (e.g., toward a façade)

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### 7. Pause and Apply the Plan

Once satisfied:

1. Click **Pause Iteration**
2. Click **Apply Plan**

Finch will finalize the generated corridors and stairwells **without units**, giving you flexibility to run unit mixes next.

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### 8. Programs vs. Space Types

After applying the plan, check your **data drawers**:

* **Programs**: High-level uses (e.g., Residential, Circulation)
* **Space Types**: Specific areas (e.g., Corridors, Stairs, Elevators)

&#x20;**Important**:\
\&#xNAN;*If you model cores in Rhino or Revit, be sure to **assign space types** (like corridors) so Finch can recognize them during unit generation.*

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### Summary

You've learned how to:

* Draw and edit centerlines
* Generate stairwells and corridors
* Customize corridor placement and compliance
* Apply your floor plan without units

In the next tutorial, we’ll show you how to **generate unit mixes around your custom corridor**.