Introduction: Loft-bed Foldable Wood Stair

Picture of Loft-bed Foldable Wood Stair

After the foldable stool-step and the stair-table, I had a request to design... believe or not, a foldable wood stair for a loft-bed!

For a project like this a 3D printed scale model is very useful, so I suggest you to make one if you have a 3D printer. You will find attached 3D drawing files in last step.

Size of the bunk bed is of course personalized, but the height is quite standard and you can easily stretch the stair to determine exact dimensions for your own bunk bed or loft. As for my last projects I didn't had time to make the wood-working, but I hope that this time we can obtain in a short time developing process pictures.

Step 1: General Views

Picture of General Views

Here you can see some views of the stair in open position. As you notice this is not a classical ladder, indeed as requested it has wide and comfortable steps, to reach the top level with less efforts. All steps have same width and there is no danger to take a false step descending the stair.

Step 2: Some Details

Picture of Some Details

In a closer view you can recognize the two halves of the stair. Each one has four steps, you can obtain all detailed dimensions at the end of this instructable.

Step 3: Closed View and Animation

Picture of Closed View and Animation

You can see that the stair can be easily folded inside the bed frame. An animation is much more effective to show the opening and the mutual movement of the parts.


For now I din't considered necessary a locking mechanism for when the stair is closed. Of course it depends by the force made by the person which climb it, and if person pushes horizontally with his feet there is danger that the stair moves. A try is indispensable to decide how to proceed.

Step 4: Unit 1 Dimensions

Picture of Unit 1 Dimensions

With these three blueprints you can determine all measures to build yourself the first half of the stair.

The slim oval you see on the first step plant is a groove on the bottom face which acts as handle and helps you to raise the stair. The carved corners will receive the top-body legs in open position, and avoid the stair closes with the body's weight.

Step 5: Unit 2 Dimensions

Picture of Unit 2 Dimensions

...and here is the top body of the foldable stair.

Step 6: Bed Frame

Picture of Bed Frame

The bed frame is usually existing, but if you need to make it is not difficult. Just add some strong joint between legs and horizontal boards, so to stiffen the structure.

In the image you can see the dimensions needed to fit with the foldable stair. All the pivots can be made with steel bolts and nuts. Just be sure that bolt heads don't interfere with structures movement, you can drill a cavity at one end of the holes, so to include bolt heads or nuts.

Step 7: Family Is Growing

Picture of Family Is Growing

The family of foldable wood furniture is growing, and you can see here the bed and his fellow the table.

With the movie of the folding stair this instructable should be all you need to make one yourself. Let us know if you succeed in that.

Step 8: 3D Model

If you wish to try making a scale model with your 3D printer here is the .stl file :-)

(it's not working for me... can you see the 3d previews?)


Buxton56 (author)2015-01-07

First let me say, I hope you had a great holiday! Now for the stairs, they are perfect! You are a genius! I can't wait to make them. I just have to convert cm to in first. I will post an instructable when make them. Once again, thank you so much. You are so sweet!

andrea biffi (author)Buxton562017-11-14


croote (author)2015-10-16

Congrats, It's really amazing!

Very very good job and thks for sharing

andrea biffi (author)croote2017-11-14

You're welcome!

MarkC327 (author)2017-11-13

That is bloody brilliant.

andrea biffi (author)MarkC3272017-11-14

Thanks Mark!

The_Kreg_Jig_Pro (author)2015-08-14

No plans? :(

AhmadT3 (author)2015-04-14

Amazing (y)

vcsekhar (author)2015-03-08

I don't need by myself and my comment is from an interest standpoint.
Probably in a next version, somebody could try this -
Have all the steps collapsed and expanded like in a tray-pull-out fashion. If care is taken to have the horizontal bars designed to stay either vertical or inclined, in collapsed-mode, it will be better. I will have to learn some CAD stuff to share the details.

Pros of my suggestion:
1) over all floor area occupied by the stairs not in use is comparatively less

Cons of my suggestion:
1) Little more effort involved

andrea biffi (author)vcsekhar2015-03-09

Good thinking! That's a very different design but very effective. Although I think it's not so stable because all the joints.. You can share a sketch by hand, sometimes thy are much better than a drawing in AutoCAD!

cecifamily (author)2015-01-29

Cavolo, grande! Che bella idea!

Mi hai aperto un mondo... complimenti per l'ingegno che metti nelle tue cose.

Ad maiora


ManishC3 (author)2015-01-17

Great Instructable!

Looking for something for my mini pick-up. Hinges are 30 inches from ground. 13 inch back door panel, opens parallel to the ground, vertical when closed. Pic attached. Any suggestions would be really appreciated. Two folding steps to each side of the door panel should do the job, imo.


rbartels (author)2014-12-25

What's the drafting software you used??

andrea biffi (author)rbartels2014-12-26

It's rhinoceros, try it! You have 90 days trial!

wandajennings (author)2014-12-21

The video on how the steps work are the coolest thing I've ever seen!!!

that makes me thinking you didn't see many things... ;-)

jcee52 (author)2014-12-18

This folding stair is brilliant! I love how you combined the flip stool/stair design into a loft bed. I really hate ladders on loft beds because they are not easy to get on and off of, but stairs usually take up too much space... so this is a nice solution to that problem. Only question is how do you open the stairs if you are on the loft bed? If someone closes it on you, are you stuck?

andrea biffi (author)jcee522014-12-18


hegure_ryu (author)2014-12-18

I've really come to love loftbeds for the way you can reduce the overall space needed in a room. I like the way this mod works with the bed.

nemo13 (author)2014-12-18

love it, favorite it!

astutzman (author)2014-12-17

How do you fit the other bed underneath if the ladder is in the way?

andrea biffi (author)astutzman2014-12-17

good question ;-) this is actually a loft-bed, and now that I look at those image I see how many awesome projects exist!

peppypickle (author)2014-12-17

brilliant! quite possibly the best update to the bunkbed I've ever seen! wish I had this growing up!

About This Instructable




Bio: I'm an Italian freelance structural engineer, graphic designer and photographer, and I'm teaching physics in Waldorf schools. I always investigate electronics, robotics and ... More »
More by andrea biffi:Wooden Gears ToyWood Gear ToyWood Rocket Lamp
Add instructable to: