# Greybox floor joist run 4 m (Modular Greybox Architecture Kit)

A 4 m joist run: seven 240 mm joists at 600 mm centres between two rim boards, with staggered solid blocking on the centre line.

- **URL:** https://3dassets.dev/assets/modular-greybox-architecture-kit-floor-joist-run-4m-7792c262
- **GLB (direct, CORS *, immutable):** https://cdn.3dassets.dev/assets/22921/v1/model.glb
- **Download (counted):** https://3dassets.dev/download/modular-greybox-architecture-kit-floor-joist-run-4m-7792c262
- **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:** Buildings & Architecture
- **Tags:** Modern, Low Poly, Kit / Set, Modular
- **Geometry:** 264 triangles, 792 vertices, 2 meshes, 2 materials, 0 textures
- **Size (m):** 4 × 0.26 × 3.7
- **Animations:** none
- **File size:** 0.01 MB
- **Downloads:** 0
- **AI used (contributor-reported):** yes; model: Claude Fable 5.1

## About

A 4 m joist run: seven 240 mm joists at 600 mm centres between two rim boards, with staggered solid blocking on the centre line. Dimensions 4.00 x 0.26 x 3.70 m (X x Y x Z). Origin at the centre of the bay on the underside of the joists; the joists span along Z. Metres, +Y up, +Z front, ground contact at y=0. Runs butt end to end along X at the run-end ports and carry the 4 m floor tile. Connectors: west (run-end), east (run-end). Neutral greybox palette for prototyping before art exists. Static geometry; no skinned rig, collision or navigation data.

## Use with three.js

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

const loader = new GLTFLoader()
loader.load('https://cdn.3dassets.dev/assets/22921/v1/model.glb', (gltf) => {
  scene.add(gltf.scene)
})
```

## React Three Fiber

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

export function GreyboxFloorJoistRun4MModularGreyboxArchitectureKit(props) {
  const { scene } = useGLTF('https://cdn.3dassets.dev/assets/22921/v1/model.glb')
  return <primitive object={scene} {...props} />
}
useGLTF.preload('https://cdn.3dassets.dev/assets/22921/v1/model.glb')
```

## <model-viewer>

```html
<model-viewer src="https://cdn.3dassets.dev/assets/22921/v1/model.glb" alt="Greybox floor joist run 4 m (Modular Greybox Architecture Kit)" 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/22921/v1/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/22921/v1/model.glb")) await gltf.InstantiateMainSceneAsync(transform);
```

---
JSON: https://3dassets.dev/api/v1/assets/modular-greybox-architecture-kit-floor-joist-run-4m-7792c262 · Loads with a plain GLTFLoader: no Draco/KTX2 loaders needed.