5 Piece Cardboard Lounge Chair

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Introduction: 5 Piece Cardboard Lounge Chair

About: I'm an inventor / maker / designer based in the Bay Area. My background is in residential architecture, film set design, animatronics, media arts, exhibit design, and electronics. I use digital design and fa...

This lounge chair is made entirely out of cardboard! No fasteners, no glued joints, just friction and slots. With two and a half 4'X4' sheets of heavy duty cardboard, paper templates, and a box cutter, you can make this comfortable and sturdy piece in a few hours.

Step 1: Design

I went with the Barcelona Pavillion Chair's dimensions as a starting point. Chair design is such a dense topic that I've been sticking with the posture and dimensions of this chair as a way to focus on material and structure experimentation. Also, I find the chair to be really comfortable. If it ain't broke, don't fix it!

After deciding on the general parameters of the chair, I moved on to thinking about assembly. Since cardboard is rigid and flexible, I didn't see any reason to use glue or fasteners for the joints. I designed the chair to be press-fit with slot joints, hoping that the friction between the parts and the semi-rigidity of the planes would keep everything in place.

After measuring the thickness of the cardboard, I came up with a few iterations in the computer before I decided on one. The last iteration seemed the best one to me for a number of reasons. I was inspired by Chairigami for this project, and it looked to me like this was they way they were making their awesome furniture.

  1. With this design, none of the parts are longer than 47 inches when cut out, which means I was able to work with 4X4 sheets instead of larger ones.
  2. It seemed the most rigid since it had four slot joint locations instead of three.
  3. I liked it better from an aesthetic point of view- it seemed more balanced in the side profile.

The Fusion 360 file is attached in this step in case you want to make your own tweaks to the design. It's free for students and hobbyists, and there's a ton of educational support on it. If you want to learn to 3D model the kind of work I do, I think this is the best choice on the market. Click the links below to sign up:

Student/Educator

Hobbyist/Startup

Step 2: Laminating & Cutting

To get a really sturdy result, I decided to make my own 3-ply sheets. When I was done with the project, I found out you can just buy it that way! Here's a link to it at Uline.

The "template" PDF file can be printed to scale and serve as a template that you can stick to the surface and follow with a box cutter. The DWG file is a CAD file that can be used for lastercutting or any other CNC cut.

I used out Metabeam laser cutter for most of this project, but I'm demonstrating here how to do it by hand. It's totally doable with a straight edge and a boxcutter with templates, it's just takes longer. Here are the steps for doing it by hand:

  1. Cut down the 5X10 sheets of cardboard to manageable sizes (no more than 48" in either dimension).
  2. Go Jackson Pollock with a tube of glue on one side of a sheet.
  3. Press on the next sheet. IMPORTANT: the corrugation needs to be oriented in the same direction on all the sheets your'e laminating. This allows you to crease it without much trouble.
  4. Repeat step 3, then put something heavy and flat (like a 1/2 sheet of 3/4" plywood) for a few hours.
  5. Print the templates at full scale, 1:1. The sheets are 4X4, which any professional print shop that does construction printing will be able to handle. You can either get the prints on cheap bond paper and use Super 45 spray glue to attach them for cutting, or you can print on sticky back material, like I did here.
  6. Use a good straight edge and a sharp box cutter, and cut out the pieces. You'll get straighter cuts with a fresh blade, so for best results replace the blade frequently.

Step 3: UPDATE: Creasing Jig

Coolteper asked for some more info on the creasing jig. I didn't document making it, but the drawing in this step should explain it pretty clearly.

There are two parts: the block that you clamp to the table and the arm that pivots on a bolt through the block.

BLOCK

The block is made of three 3/4" plywood pieces: one 3/4" X 6" X 6" piece for the middle and two 3/4" X 6" X 12" pieces that make the sides. The gap in the middle is for the arm to slot into.

ARM

The arm is a piece of 3/4" plywood that's 6" deep by about 48" long. There's a an angled cut at the pivoting end so it doesn't bind to the block and a 45º miter cut along the length of the arm. This cut gives you a sharp edge to do the creasing. There's a bolt through drilled holes in the block and arm that the arm pivots on. I used a 1/4"Ø bolt for this and a locknut to keep it from unscrewing on its own.

I used a pressure clamp to attach the block to the work table and adjusted it so that the edge is perfectly flush with the table.

Step 4: Creasing

To get the creases even and clean, I whipped up the creasing jig shown in the photos. It's just 3 pieces of plywood with a gap in the middle, and a bolt through a hole in the top that turns the arm into a lever. The arm has a 45º miter on its edge (that I cut on the table saw) that makes for a nice sharp crease.

I clamped it to the table so that the edge was flat on the table top, and used it to make the creases. This part's really easy and goes very quickly.

Step 5: Assembly

Assembly is the easy part! All you have to do is align the folded surfaces with the proper slots and put them together. Each piece makes it sturdier, and when you insert the last one you end up with a rock solid chair made of paper!

The pieces only fit together one way, and the creases (obviously) have to be edge-out, so you can't mess this up if everything was cut properly.

Step 6: Finished Product

The chair is very sturdy

2 People Made This Project!

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55 Comments

How do we print to do the chair?

what do we print and how?

1 reply

Print the PDF files provided in step 2 at any print shop that will do large format printing (Kinko's in the US will do it). Print the sheets on 48" X 48" paper at 100% scale and they will be the correct size. If they can't do exactly 48" X 48", any sheet size that's bigger than that will work as long as they print the PDF files at 100% scale.

i really love the design, but i can't get to a print shop and autocad is not being very nice right now
do you by any chance have the dimensions yet?
i really need them
thanks :D

Great design! I've problems to figure out the
dimensions, there are three PDF. Two of them have a paper size of
1219x1219 mm and the other one just 216x279 mm; I've just looked into
the properties with my PDF viewer. So on what scale should I print the
templates? You read something about templates and sheets but I don't
get it... :D ... If I would know the size of paper I have to print the
three templates on it would help me a lot! Thanks for sharing your design!

Greetings,

It looks like a lovely design however as a senior with back issues I need something straight backed or slanting slightly forward. I it possible to tweek the design with that in mind or would I have to start all over? Sharonspearls @dslextreme.com

1 reply

You could tweak it to make the back come forward, but you'd need to adjust all the dimensions to make this work.

Do you have dimensions for the templates as i want to draw on the sheets directly and cut

1 reply

Sorry, I don't have time to dimension out every part.

If you want dimensions, you can download the AutoCAD (in step 2) file and use the free DWG Viewer: http://www.autodesk.com/products/dwg/viewers

With that program, you can measure the parts yourself and lay out the cuts by hand if you'd rather do it that way. Hope this helps!

Thanks for sharing this! Great design job! Will be very helpful for a lot of people for sure!

What would the dimensions be for a sheet of cardboard that is 4x7?

1 reply

The dimensions wouldn't change. The three PDFs in the instructable are for 4X4 sheets, so if you're working with 4X7 sheets you'll just have leftovers.

Really great, i love this!

It is really expensive to get cardboard that big here, where i live and 47 inches is pretty big. So, may i alter your plans and split some of those parts into smaller ones? Like the rest and seating parts?

1 reply

That seems feasible- what sheet sizes are available where you are?

Thanks a lot !!!

I don't know off the top of my head. All of the parts can be cut from three 4'X4' pieces of 3-ply corrugated cardboard. The templates are all you'll need.

1 reply

Sorry it took so long to reply! I think you're going to have a hard time with used boxes. You're better off buying sheets at a shipping supply place (they're usually about $15 for a 4'X8').

i have a bunch of.ups shipping.boxes is there any way to.do this???? please reply. thanks ahead