Loft-bed Foldable Wood Stair




About: I'm an Italian freelance structural engineer, graphic designer and photographer, and I'm teaching physics in Waldorf high-schools. I always investigate electronics, robotics and science in general, I'm a pas...

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

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

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

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

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

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

Step 6: 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

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?)

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    23 Discussions


    4 years ago on Introduction

    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!

    1 reply

    3 years ago

    Congrats, It's really amazing!

    Very very good job and thks for sharing

    1 reply

    4 years ago on Introduction

    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

    1 reply
    andrea biffivcsekhar

    Reply 4 years ago on Introduction

    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!


    4 years ago on Introduction

    Cavolo, grande! Che bella idea!

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

    Ad maiora



    4 years ago on Introduction

    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.



    4 years ago on Introduction

    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?

    1 reply

    4 years ago

    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.