Trapdoors and Ladders
by obsidian29
Trapdoors and Ladders lets a player climb a ladder through an open trapdoor when a ladder sits in the block below it, a behavior vanilla Minecraft does not provide.
What it does
Vanilla Minecraft hardcodes its trapdoor and ladder behavior to the vanilla ladder block. Trapdoors and Ladders changes that so an entity can climb through an open trapdoor when the block beneath the trapdoor is a ladder. Because the check is made on the ladder behavior rather than one block class, it also applies to ladders added by other mods. The mod is built with a mixin and is server-side only, so the server needs it and players join without installing anything.
Installation requires Fabric API on the Fabric loader. Files are published for 1.20.1 – 1.21.3 across ten release versions, and the latest build, 1.0.0, targets 1.21.3 and was released on 2024-10-31. The code is not open source, and the mod is released under All rights reserved. Nemo's More Ladder Variants (MStV+) is an optional companion, and installing it adds more ladder types for the mod to work with.
Key features
Climbing through open trapdoors
An entity climbs a ladder through an open trapdoor when the block below the trapdoor is a ladder.
Support for modded ladders
The behavior is not limited to the vanilla ladder block, so ladders from other mods can take part as well.
Mixin-based change
The change is applied through a mixin on the trapdoor and ladder behavior rather than by replacing the blocks.
Compatibility
Latest build for each game version and loader.
1.21.x4 of 4 versions with builds
1.20.x6 of 6 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Optional 1
How it compares
Trapdoor Ladder is client and server, open source under the GNU General Public License v3.0 or later, and published for 1.21.7 – 1.21.8 on Fabric. Decorative Ladders runs on Fabric and Forge for 1.20.1 – 1.21.7 under the MIT License, and it is client and server. More+ Ladders is client and server, open source under the GNU Lesser General Public License v3.0 only, and limited to 1.19.2 on Fabric. Trapdoors and Ladders differs by being server-side only and covering 1.20.1 – 1.21.3.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Trapdoors and Ladders | Fabric | 1.20.1 – 1.21.3 | Server-side only | 2024-10-31 |
| Trapdoor Ladder | Fabric | 1.21.7 – 1.21.8 | Client and server | 2025-08-23 |
| Decorative Ladders | Fabric and Forge | 1.20.1 – 1.21.7 | Client and server | 2026-03-02 |
| More+ Ladders | Fabric | 1.19.2 | Client and server | 2022-10-27 |
Questions
Does Trapdoors and Ladders need Fabric API?
Does the server need Trapdoors and Ladders?
Does the mod work with ladders from other mods?
In the catalog
Trapdoors and Ladders is one of 3,932 Transportation mods on ModsFinder, and one of 2,390 Transportation mods for Fabric. 13,252 mods support Minecraft 1.21.3.
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What the author says
When I created a mod to add ladders of all the vanilla wood variants, I discovered rapidly, to my dismay, that vanilla Minecraft has a very stupid thing: The code which allows an entity to climb through an open trapdoor as if it were a ladder, providing the block below is also a ladder, is hardcoded to the vanilla…
Official listing
- Modrinth page
- modrinth.com/mod/trapdoors-and-ladders
- Owner
- obsidian29
- Published
- 2024-10-31
- Updated on Modrinth
- 2024-10-31
- Facts verified
- 2026-10-15