loading
Picture of How to build a chair for your Christmas dog
2012-08-06 17.40.34.jpg
I wanted to design a chair with the lowest possible moments at each joint but stay away from the original straight leg design. By using Force Effect by Autodesk on an Ipad, this is what I came up with:

With a load of 200lb evenly distributed across the seat of the chair, there is less that 8 lb.* in. of torque at each joint.. Since this is only my first design, I decided to build a 1:8 scale model of the chair out of wooden matches and superglue. Here are the following steps to building it.
 
Remove these adsRemove these ads by Signing Up

Step 1: Set up and prep

Picture of Set up and prep
2012-08-04 14.42.45.jpg
First is the set up for the project. You will want to place wax paper over a hard surface that you don't mind getting cut up by razor blades. (I used an old notebook that I had laying around) Set out your wooden matches and cut 8 of them to 2in. and 2 more of them to 1.75in. using the razor blade and set them aside. 

Step 2: Profile layout

Picture of Profile layout
2012-08-04 14.52.09.jpg
Layout the profile of the legs with 4 of the 2in. legs forming an "M" and the 1.75in. match forming the top. Make 2 sets of these and use a ruler or straight edge to align the bottom of each of the legs. Then, place a small drop of super glue or wood glue at each of the joints. Let these dry and try not to bump them. 

Step 3: Building the seat

Picture of Building the seat
2012-08-04 15.06.41.jpg
To build the seat, lay out 16 matches side to side with the heads alternating. Place a line of glue perpendicular to the matches on the seat and place a supporting match on the glue path you just drew. This will provide support and keep the seat together. 

Step 4: Attaching the legs to the seat

Picture of Attaching the legs to the seat
2012-08-05 10.11.36.jpg
2012-08-06 17.40.34.jpg
This is the tricky part. You need to have something hold the legs in place while the glue drys out. I used a bent piece of cardboard with a slit cut in it. Once both legs are dried, the chair is complete and feel free to place your Christmas dog on top of it :) 

Hopefully this model will hold up as I move up to larger scale models! Have fun!
mnichol42 years ago
should have lit the matches for the photo, the amount of time it takes for a cataclysmic change reaction and phase change of phosphoro in comparison to a camera flash is relatively reasonable. Also, the wax paper serves as a safety net in case one of the matches falls due to the force of your photography. All around though, well done. Balance the force::applies for kinetics and statics, and therm o-dynamics, and dancing, and typing.
buirv2 years ago
Leaving the heads on the matches makes it seem like you want to torch your Dog whether by accident or intent. Is that the deal here?