Is the Ladders 3D model free for commercial use?

Yes. It is free under the 1DesignTool 3D library license: use it in personal and commercial work — games, apps, websites, renders, ads and client projects — and modify it as you like, with no credit required. What you can't do is re-sell or re-distribute the file on its own or inside a model pack.

What file format is it, and how big is it?

A single binary glTF 2.0 file (.glb), 127 KB: 1,616 triangles, 4,848 vertices and 16 materials, modelled in metres at 4.0 m × 1.5 m × 86 cm.

Can I animate Ladders?

It ships as a static mesh. Its 7 named parts are separate nodes, so you can move or animate each one in your engine.

Which engines and tools can open it?

Anything that reads glTF 2.0. three.js, React Three Fiber, Babylon.js, Godot 4 and Blender import the GLB directly; Unity and Unreal Engine load it through their glTF importers. The snippets above show the exact code for three.js, React Three Fiber, Godot and Blender.

How was the Ladders 3D model made?

Claude Code (Claude Opus 5.5) generated it inside 1DesignTool's 3D template from a written brief, then the design kit's checks verified the geometry and the GLB before it was published. You can make your own the same way with 1DesignTool.

FREEcommercial use · no sign-up

Ladders

A low-poly firehouse ladder rack: a two-section engine-red extension ladder with brass guides and a halyard, plus a roof ladder with brass folding hooks, both stored on edge on a freestanding steel rack.

Original GLB127 KB Poster

Left rail: colours and the 4 knobs the agent wrote into this model — they rebuild the geometry and go into your download. Right rail: looks for the viewer. Drag to orbit, scroll to zoom.

Triangles: 1,616
Vertices: 4,848
Meshes · materials: 16 · 16
Size (W × H × D): 4.0 m × 1.5 m × 86 cm
File: GLB · 127 KB
Animation: Static
Style: Low-poly
Collection: Fire Station

Palette · named materials

engine red — ladder rails (default livery)#c32222
white — rail tip caps (default livery)#f4f1ec
dark wood — rungs#3d2a1c
brass — fly guides, halyard pulley, roof hooks#b28c34
warm white — halyard rope#f2ede2
mid grey — rack feet, posts, struts, arms and stop pins#7d828c
soot black — levelling pads, arm pads, post caps, pin caps, rung pawls, hook pivots#1b1b22

Use it

import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";

const gltf = await new GLTFLoader().loadAsync(
  "https://assets.stoicsoft.com/1designtool/3d/models/fire-station-ladders/bf2c65d735/model.glb"
);
scene.add(gltf.scene); // metres, +Y up, front faces +Z

How it was made

The brief given to 1DesignTool's “3D object” template:

Ladders for the Fire Station kit. Design it as one clear asset at believable real-world scale for that setting (state the size in metres in meta.notes), with its main parts modelled and named, readable at thumbnail size and from every orbit angle. This is one part of the Fire Station kit (Low-poly style, flat-lowpoly direction): Ready for the alarm. Use ONLY the kit palette, by name: engine red #c32222, brick #9e3d2e, brass #b28c34, white #f4f1ec, engine red dark #821717, brick dark #63261d, engine red light #db5757, brick light #c66253, soot black #1b1b22, warm white #f2ede2, mid grey #7d828c, dark wood #3d2a1c. Every material's `name` must be exactly the palette colour it uses — the GLB carries these names so the kit recolours as one; an unnamed material fails delivery. Kit knob: expose a param `engineLivery` (0–1, default 0.5) for the kit's "Engine livery" setting wherever it makes sense on this part, and keep that id.

Agent: Claude Code · Claude Opus 5.5 in 1DesignTool
Direction: Low-poly · family products
three-check PASS · glb-lint PASS

Make your own with 1DesignTool →

Named parts · 7

Ladders
Ladder rack
Extension ladder bed section
Extension ladder fly section
Guides, pawls and halyard
Roof ladder
Roof hooks

Note: Size: 4.05 m long (x, with the fly slid out 0.6 m and the roof hooks), 0.86 m deep (z, at the rack feet) and 1.49 m tall (default params). The bed section is 3.6 m long and 0.46 m wide, the fly 3.3 m and 0.40 m, the roof ladder 2.81 m and 0.38 m, with rungs at 0.3 m pitch. The ladders are stored on edge with their faces to +Z, so the rails-and-rungs pattern reads from the front. The origin is at the bottom centre and the model rests on y = 0. The GLB has 1,616 triangles in 16 meshes (merged per part and colour) and no animation clip; at 4.8 m with 0.25 m rungs it adds about 20 rungs (about 500 triangles), well under 6,000 (estimated from rung count, not exported). Normals are baked flat (non-indexed). Every material is named exactly after its kit palette colour. The exporter writes one material per mesh, so the same colour name appears on several materials: recolour by name. Seven of the 12 kit colours are used; brick tones are left to the buildings. engineLivery (the kit's 'Engine livery') sets the rail paint in three bands: below 0.33 white rails with engine red tips; 0.33–0.67 engine red rails with white tips (default); above 0.67 engine red dark rails with engine red light tips. Params are baked into the GLB at their defaults and only change geometry when the scene is rebuilt in the viewer. glb-lint: 0 errors. Its heuristic warnings (duplicate materials from the per-mesh export, unindexed flat-shaded geometry, sibling overlap where the nested fly and the rack sit inside the ladders' bounds) are expected. plan-check passes except for its part-id regex, which rejects the hyphens this library's slug-based ids need. The same plan with the slug de-hyphenated passes, and three-check finds all 7 ids in the scene and after the GLB reload.

About the Ladders 3D model

Ladders is a free low-poly 3D model from the Fire Station set. It measures 4.0 m × 1.5 m × 86 cm (W × H × D) at real-world scale and is built from 1,616 triangles across 16 meshes, with 7 named parts. Download the 127 KB GLB and drop it into three.js, React Three Fiber, Godot or Blender — free for commercial use, no attribution required.

Is the Ladders 3D model free for commercial use?: Yes. It is free under the 1DesignTool 3D library license: use it in personal and commercial work — games, apps, websites, renders, ads and client projects — and modify it as you like, with no credit required. What you can't do is re-sell or re-distribute the file on its own or inside a model pack.
What file format is it, and how big is it?: A single binary glTF 2.0 file (.glb), 127 KB: 1,616 triangles, 4,848 vertices and 16 materials, modelled in metres at 4.0 m × 1.5 m × 86 cm.
Can I animate Ladders?: It ships as a static mesh. Its 7 named parts are separate nodes, so you can move or animate each one in your engine.
Which engines and tools can open it?: Anything that reads glTF 2.0. three.js, React Three Fiber, Babylon.js, Godot 4 and Blender import the GLB directly; Unity and Unreal Engine load it through their glTF importers. The snippets above show the exact code for three.js, React Three Fiber, Godot and Blender.
How was the Ladders 3D model made?: Claude Code (Claude Opus 5.5) generated it inside 1DesignTool's 3D template from a written brief, then the design kit's checks verified the geometry and the GLB before it was published. You can make your own the same way with 1DesignTool.