Hooks and Hangers for the Cabin: 3D-Printed Ways to Hang Foulies, Towels and Torches
Every boat has the same problem below deck: nowhere to hang anything. Wet foul-weather gear ends up on the sole, towels never dry, the head torch is always in the wrong locker and the cabin looks like a laundry basket after a single squall. Off-the-shelf marine hooks are either overpriced stainless castings or suction cups that let go at 2 a.m. A 3D printer solves this cheaply and, more importantly, lets you size each hook for what will actually hang on it and where it has to go.
This guide covers the parts that matter: how a hook fails, how to design one that doesn't, which material to print it in, and where in the cabin each type earns its keep.
How a printed hook fails (and why it's not the plastic)
People assume a plastic hook fails by snapping. In practice, the order of failure on a boat is usually:
- The mount lets go. Adhesive pads peel off gelcoat in the heat; a single screw into thin liner pulls out when a wet jacket swings on a tack.
- The hook levers off its base. A tall hook on a small base is a lever: the load tries to peel the top screw out.
- The layers split. Only if the part was printed in the wrong orientation does the plastic itself give up, usually right at the root where the hook meets the plate.
So a good cabin hook is mostly a good base. The hook itself is the easy part.
Design rules that make a hook hold
1. Spread the base, keep the reach short
Torque on the top fastener is load × reach. A 40 mm-deep hook carrying a 3 kg wet jacket pulls the top screw with roughly 3 kg × 40 mm / (screw spacing). With screws 20 mm apart that's about 6 kg of pull-out on the top screw; with screws 60 mm apart it drops to 2 kg. This is exactly why a rail with two widely spaced screws beats a row of individual hooks: the same two fasteners carry every hook, and the lever arm is small. A modular wall hook rail puts up to five hooks on one two-screw bar for this reason.
2. Round the root, don't sharpen it
The junction between hook and plate is a stress concentration. Add a fillet of at least 3–4 mm there; a sharp inside corner is where cracks start, in any material.
3. Turn the tip up
A hook whose tip rises 10–15 mm above the throat keeps a jacket on through a knockdown. Straight pegs don't. For lines, bags and anything with a loop, a closed clip is better still: a double C-clip hook holds two items and can't shake them off.
4. Size the throat to the object
Towels want a wide throat (30 mm+) so they dry rather than bunch. Torches, binoculars and VHF handhelds want a clip cut to the actual body diameter, which is what parametric holders such as the custom wall clip holder exist for: type in the diameter, print, done.
Print orientation: the one setting that decides everything
Lay the hook so the layer lines run along the hook, from base to tip, not across it. On a typical L-shaped hook that means printing it on its side, with the back plate vertical on the bed and a small support or a chamfered bottom for the overhang. A hook printed standing up on its plate is stacking layers across the root and will snap under a fraction of the load. If you want the full reasoning, see Print Orientation and Strength: Boat Parts That Don't Snap.
Settings that work for cabin hooks on any FDM printer:
| Setting | Value | Why |
|---|---|---|
| Walls | 4–5 perimeters | Hooks are bending parts; strength is in the skin, not the infill |
| Infill | 30–40 % gyroid | Enough to support the walls without wasting filament |
| Layer height | 0.2 mm | Fine for strength; 0.28 mm is fine for rails |
| Top/bottom | 5 layers | The back plate takes the screw load |
Material: PETG below, ASA where the sun gets in
For hooks that live in the cabin, PETG is the sensible default: tough, slightly flexible, cheap and unbothered by damp. Under a hatch, in a companionway or anywhere sunlight hits daily, use ASA; PETG goes brittle and chalky after a season of UV. Skip PLA entirely: a closed boat in July easily hits 60 °C and PLA hooks sag. For a soft-touch hook that won't scratch gelcoat or a varnished bulkhead, a TPU tip or an entirely TPU clip works well, as covered in TPU on Board. The full material comparison is in Best Materials for 3D Printing Boat Parts.
Mounting: what to screw into, and what not to
- Solid bulkheads and plywood: two stainless (A4/316) pan-head screws, 4 mm, into pilot holes. This is the ideal case.
- Thin liners and headlinings: don't. The liner won't hold. Either find a stringer behind it or switch to a rail that spans to solid structure.
- Gelcoat you don't want to drill: use a large base (≥ 40 cm²) and a proper structural adhesive such as a high-bond acrylic tape or a polyurethane sealant-adhesive, and accept a lighter load rating. Our guide on drill-free mounting covers what actually sticks and what doesn't.
- Tubes and handrails: a two-piece clamp is stronger than any adhesive and leaves no holes. The tube-mount clip holder is sized to the tube diameter you enter.
If you'll be taking hooks on and off, put brass heat-set inserts in the back plate so the screws thread into metal rather than plastic; the how-to is in Heat-Set Inserts and Marine Hardware.
Where each hook earns its place
| Location | What hangs | Best print |
|---|---|---|
| Companionway / wet locker | Foulies, harnesses, lifejackets | Rail, 5 wide hooks, 60 mm+ screw spacing, ASA |
| Head | Towels, wash bag | Two-hook rail with wide throat, PETG |
| Nav station | Torch, VHF, binoculars, glasses | Sized clip holders, PETG |
| Cabins | Bags, clothes, headphones | C-clips (nothing falls off), PETG |
| Galley | Utensils, cloths, mugs | Round-hook rail; see the galley organizers guide |
| Cockpit / handrails | Winch handle, hose, bucket | Tube clamps, ASA |
Browse everything for below deck in the Interior & Cabin collection, and rail- and stanchion-mounted holders in Deck & Rigging.
Load ratings: be honest with yourself
A well-printed PETG hook on two screws into plywood will comfortably carry 5–10 kg static. What it won't take is a crew member grabbing it as a handhold in a seaway. Print hooks for gear, never for people; for anything a body might load, read what 3D printing can and can't do for grab handles.
Safety note: 3D-printed parts are not certified marine equipment. Check the material and mounting are suitable for the load before use, keep printed hooks away from anything safety-critical, and inspect them each season for cracking at the root.
A 30-minute project
Measure the screw spacing you can reach solid structure with, count what needs to hang, pick a hook rail, set the number of hooks and the throat width, and print it on its side in PETG or ASA. Two screws later the cabin sole is clear. Questions about a specific spot on your boat? Write to info@marinelab3d.com.