# cell block stair (Prison Complex Builder)

Fifteen steel stair treads, two stringers and handrails connect ground to the 3 m mezzanine level.

- **URL:** https://3dassets.dev/assets/prison-complex-builder-cell-block-stair-25016e8d
- **GLB (direct, CORS *, immutable):** https://cdn.3dassets.dev/assets/6176/v2/model.glb
- **Download (counted):** https://3dassets.dev/download/prison-complex-builder-cell-block-stair-25016e8d
- **Licence:** CC0 1.0 Universal: https://creativecommons.org/publicdomain/zero/1.0/ (no attribution required)
- **Contributor:** 3D Assets (@3dassets): https://3dassets.dev/u/3dassets
- **Category:** Environments & Scenes
- **Tags:** Modern, Realistic, Modular, Kit / Set
- **Geometry:** 5,556 triangles, 16,668 vertices, 3 meshes, 3 materials, 0 textures
- **Size (m):** 1.06 × 4.073 × 3.792
- **Animations:** none
- **File size:** 0.26 MB
- **Downloads:** 0
- **AI used (contributor-reported):** yes; model: Claude Fable 5.1; GPT-6 via Codex

## About

Fifteen steel stair treads, two stringers and handrails connect ground to the 3 m mezzanine level. Dimensions 1.06 × 4.07 × 3.79 m (X × Y × Z). Metre units, +Y up, +Z front; origin on the ground at the footprint centre unless stated. Institutional painted concrete, galvanised and painted steel, practical polymer and fabric finishes. Static geometry; no rig, animation, collision or navigation data. Grid origin retained; connector locations and directions are explicit. Named nodes, where present, retain local hinge/wheel pivots; no authored animation.

## Use with three.js

```js
import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js'

const loader = new GLTFLoader()
loader.load('https://cdn.3dassets.dev/assets/6176/v2/model.glb', (gltf) => {
  scene.add(gltf.scene)
})
```

## React Three Fiber

```jsx
import { useGLTF } from '@react-three/drei'

export function CellBlockStairPrisonComplexBuilder(props) {
  const { scene } = useGLTF('https://cdn.3dassets.dev/assets/6176/v2/model.glb')
  return <primitive object={scene} {...props} />
}
useGLTF.preload('https://cdn.3dassets.dev/assets/6176/v2/model.glb')
```

## <model-viewer>

```html
<model-viewer src="https://cdn.3dassets.dev/assets/6176/v2/model.glb" alt="cell block stair (Prison Complex Builder)" camera-controls auto-rotate></model-viewer>
```

## Blender

```python
# Blender 4.x: File > Import > glTF 2.0, or from the Python console after downloading the file.
import bpy
bpy.ops.import_scene.gltf(filepath='model.glb')  # from https://cdn.3dassets.dev/assets/6176/v2/model.glb
# Metres and +Y up are converted to Blender's Z-up scene automatically.
```

## Godot

```gdscript
# Godot 4: copy model.glb into res://models/ and the editor imports it as a scene.
var packed := load("res://models/model.glb") as PackedScene
var model := packed.instantiate()
add_child(model)
```

## Unity

```csharp
// Unity: import model.glb with glTFast (Package Manager: com.unity.cloud.gltfast) and drag the prefab in,
// or load it at runtime straight from the CDN:
using GLTFast;
var gltf = new GltfImport();
if (await gltf.Load("https://cdn.3dassets.dev/assets/6176/v2/model.glb")) await gltf.InstantiateMainSceneAsync(transform);
```

---
JSON: https://3dassets.dev/api/v1/assets/prison-complex-builder-cell-block-stair-25016e8d · Loads with a plain GLTFLoader: no Draco/KTX2 loaders needed.