Inspired by Rob MacPherson's medieval-style collapsible bed (see here), I decided to take a simplified approach towards a twin-sized version for a Christmas gift. This design lacks all the bells and whistles of MacPherson's design, and was made to simply slide under another bed for storage between use.

All things considered, I'm glad with how it turned out and how quickly I was able to put it together (about a week from design to finished product). The cost for materials was reasonable and it works like a charm!

To see a short video of the assembly, click here

Step 1: Design and Materials

I should preface any description of the design by mentioning that a picture really is worth a thousand words, especially in this case. If any of these explanations don't make sense, be sure to check out the photos to clarify (more so during the other steps than this one; these pictures are just a compilation of my poorly organized design sketches).

The design is simple enough; it consists of two main parts/systems: the "box" and the slat/rail system. The "box" is a simple box, cut in half, which contains the extending sides. In order for the box to be able to close completely, the sides (and hinges) have to be offset by several inches. This will be covered in greater detail in the next step.

The slat/rail system consists of a 1"x2" pine board running along both sides of the extended "box". This rail is lined with small, trapezoidal 3/4"x3/4" pieces that engage with the dovetail joints in each slat. This ensures that the sides cannot extend once the slats are in place.

I'll cover the assembly in greater detail in the following steps, but for now I'll wrap up this step with the list of materials needed:


6" Fence Gate Hinges (12)

3/4" Wood Screws

2" Wood Screws


1"x2" Pine Board: (3) 8' Lengths

TBD (I made these cuts after assembly; they get a little complicated with the hinges in the way)

1"x3" Pine Board: (10) 8' Lengths

(20) 39" Lengths

1"x8" Pine Board: (2) 8' Lengths

(2) 26.75" Lengths

(2) 28.25" Lentghs

1"x10" Pine Board: (3) 8' Lengths

(2) 40.5" Lengths

(2) 39" Lengths

(2) 10" Lengths

Wood Stain, brushes and/or rags for applying

Step 2: "The Box"

First, construct the two halves of the box by screwing together one of the 40.5" pieces with the 39" piece and the two 10" sides. See the first picture for clarification. Yes, I know this will leave a gap along the bottom, and I do mostly regret it....but in the long run you'll almost never see it because it will almost always be covered when in the "closed" position. The first of many potential improvements, but as I was on a deadline I let it slide.

Next, the complicated part. In order for the sides to be able to close without interfering with each other, they must be offset by a couple of inches. I calculated a 2" offset and that seemed to work alright.

In order for the design to function correctly, the shorter end (the 26.75" one) must be the "offset" side. That means that when you attach the 26.75" side to one of the halves of the box, the hinges must be set 2" into the box. The hinges for the 28.25" side are then attached flush to the other half of the box. Once again, see the pictures for clarity. I tried to take some good closeups so that you can get the idea.

For the other side, flip the 26.75" and 28.25" lengths. I mention this because I accidentally forgot and had to take everything off and re-do it.

I placed the hinges almost flush with the top and bottom of the 1"x8" pieces, but I offset the 1"x8" from the 10" sides of the box by about 3/4". Initially, I designed this offset to allow for a lid to be placed on top of the box, but I ended up nixing that idea so you could easily set these flush with one another.

Some reminders/tips for the hinges: Make sure that attach the hinges in the right orientation. These hinges will normally bind in one direction and then fold completely in the other direction. Depending on where they are being placed, the hinges will need to be attached accordingly. Also, I used a router to knock of an 1/8" of wood behind the hinges in order to buy myself a little more space when in the "closed" position. Once again, see the pictures for clarification.

Step 3: The Slats

This is where it gets complicated. First, the 1"x2" lengths must be cut into corresponding lengths to run along the 10", 26.75", and 28.25" lengths. It wouldn't hurt to miter every one of these before screwing them to the sides of the bed. This will allow the sides to open and close without bumping into each other. I attached these "rails" 3/4" under the top set of hinges. Try your best to keep these level relative to each other (and especially from one side to the next , so that there's no incline when you put the mattress down).

Once these are in place, cut your remaining 1"x2" into 3/4"x3/4"x1.5" pieces, with a slight miter on both sides. This miter can be anywhere from 20-30 degrees, and must correspond directly with the dovetail that will be cut into each of the slats.

Now the slats. Cut your 1"x3" lumber into as many 39" lengths as possible (I ended up using 21, but in hindsight I would have preferred a round 20). Trace and cut a 3/4" deep dovetail into both sides of each slat, once again corresponding to the depth and angle of the trapezoidal pieces that were just cut.

Now ensues the tedious process that I will summarize in the following 4 steps:

1. Set slat on rail.

2. Place one trapezoidal piece on both ends, engaging the dovetails in the slat.

3. Drill a pilot hole and screw the trapezoidal piece into the rail.

4. Rinse, repeat

**Tip: number your slats 1-20 and mark one side of the bed as the starting point. This will help you avoid some complications in the future.

It sounds simple, but you'll also have to check often to ensure that the pieces you're screwing in aren't interfering with the box's ability to close and open. This will require some adjusting of the pieces around the hinges (you can probably see a couple of adjustments in the closeups)

Step 4: Finishing Touches

Now that you've got everything assembled, there's just a few more finishing touches before it's ready for a mattress! First of all, you'll need something to support the sides of the bed, near the hinges. My simple, practical solution was to attach a small bracket to a 2"x4", which -conveniently- fit perfectly under the sides of the bed. These, as well as the slats, fit conveniently into the box when collapsed into the "closed" position.

I also applied a dark stain to the outside of the box, which gives it a much better look overall, both in the open and closed positions. Let it dry and it's ready for a mattress! The twin-sized mattress fits perfectly inside the frame, and if I do say so myself it looks great. Simple. Practical. Beautiful. Oh yeah, and less than $150.

I'd love to hear your comments for potential improvements/changes to this design. I came across a couple along the way but I'd love to hear yours!

Look's to me, to move it, a set of wheels could be attached to make the box into its own hand truck.<br>
How much does the final product weigh? I think it would be ideal for camping at S.C.A. but concerns have been voiced that we'd need three people to move it.
I am able to carry it with some difficulty, although I do have long arms which allow me to get a good grip on it. Two people could certainly move it with no problem, and I'm sure some apparatus could be designed to allow one person to carry or roll or drag it by themselves.
<p>i like ... lo hare cuando tenga tiempo,,, excelente proyecto...</p><p><br></p>
<p>now just roll up an inflatable mattress and pack it in there too.</p>
Looks great... Ran across this as well
<p>I hate those professionals with their genius ideas, make us amateurs looking bad and winning the contests :-D Just kidding, great work! </p>
These project is amazing. Congratulations.
<p>YES!!! I've admired the clever design of MacPherson's Bed-in-a Box since it was first published, and hats off to Wood Chuck for providing his plans for the original design in all sizes!!! That said, for me it seemed complex to make and heavy to move, so I never seriously considered building it without simplifications that I just never drew up. Your modification seems much easier to build (although as you say, with fewer bells and whistles) than the original design, so I'll probably take it on with my primitive tools and limited time/patience/energy/skills.... </p><p>I think I'll try some springy bent-wood slats removed from an Ikea bed base to reduce the weight a bit and to make a thin mattress more comfortable. Maybe drill a hole near both ends of each slat, and drop the slats in place onto short pegs (or screw-heads?) in the support rails. That's easier for me than accurately cutting trapezoidal blocks and matching dove-tails for each slat. Also, if I didn't need to store it under another bed I'd make the frame from 1x12's for a little more height (maybe enough to store the folded pad inside since the bent-wood slats are about half as thick as 1x3's), plus casters or glides, and a top, as already commented, for added utility either as a low table or as a bench with folded pad on top. </p><p>Thanks for this! Voted!</p>
<p>Great job on the ible and your finished bed.</p><p>I created plans for all of the different sized bed in a box with Mr MacPherson's permission about three years ago. Single through King. If you are interested they are available at 3dwoodworkingplans dot com</p>
<p>I think with a few design tweaks, this would be very marketable! the first thing that comes to mind would be adding casters on the bottom, to make it easier to move. The next would be to add a lid, so it could be used as a coffee table/ottoman, or extra seating. The folding cushion could then be used for seating, on top of the box, or stored, to use the box as a hard-top coffee table.</p>
<p>Just did a search: they're called camping futons. </p>
<p>I like Heather's idea for a mattress, and there're some easily fold-able futon mattresses.</p>
<p>This is so cool! I wonder if a mattress could be designed to fold up on top of the box to create a little love seat/bench. It might not be as comfortable as a standard twin mattress, but it's definitely an option for people needing even more space. :) </p>
<p>Adding a twin air mattress and pump would be ideal! Easy to store and use when needed.</p>
<p>Perhaps something like this? You could put it right on top of the wooden box fold out bed and it would make a cool looking, multi-functioning ottoman, too!</p>
<p>Brilliant design! Now if you could only work out how to get the mattress to follow suit!</p>
<p>I store an extra mattress on top of the twin bed in my guest room. If I only have one guest, they get a double mattress. If I need a mattress for the second bed (bed-in-a-box), then each bed gets one mattress.</p>
Clever and not wasting space.
<p>awesome would love one</p>
<p>Wow! Do you have a video of you opening it? I can't believe that this isn't an illusion!</p>
<p>Just included a link to a short video of the assembly, it's in the description on the Intro page. Enjoy!</p>
That's a great idea, I'll work on posting a video as soon as possible
<p>I'd never seen anything like that. Cool!</p>
<p>Thank you for sharing, this is awesome!</p>
<p>it's a great IDEA ?</p>
This is ingenious... fantastic design and execution!
<p>If you haven't patented this, you should. This is brilliant! </p>
<p>I love this idea!! </p>
<p>this is great, nice work and thanks for sharing :)</p>
<p>It's a great addition to our guest room. With the added height of inexpensive risers under the legs of our standard twin bed frame, I can easily slide this bed-in-a-box under the bed, still leaving room for another box used for storage of bedding.</p>
Nice ible! Im voting just because youre username is so funny! I get the joke!
<p>Excellent idea and perfect instructions, i vote for you man.</p>
<p>Really nice bed and well done Instructable. Thanks.</p>
<p>You've just rendered the old trundle bed obsolete! ☺</p>
Great idea!
Perfectly practical and ingenious! Great 'ible!

About This Instructable




Bio: I enjoy building and inventing; I love creating new things and improving on old ideas. I am a student at BYU and am studying under ... More »
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