WikiSeat Catalyst Jig1





Introduction: WikiSeat Catalyst Jig1

A WikiSeat is a three legged stool that is built by hand. Each WikiSeat starts with a Catalyst that acts as a central support structure. The creator of a WikiSeat has the freedom to gather materials and find their own methods for building the seat. WikiSeat creators can share what they have made and become inspired by others at .

This instructable shows how you can build your very own Catalyst! They can be used for all sorts of things:

+A great gift (or challenge) for your DIY friends and family.
+For teachers, building WikiSeats for a class project makes for a fun and engaging experience.
+Or you can build a WikiSeat of your own.

If you plan on building more than just a few Catalysts, check out the WikiSeat Catalyst Jig2 which lets you build Catalysts even faster!

Step 1: Tools and Materials

You will probably need all this stuff


+MIG Welder
+Something to cut steel: chop saw, band saw, hack saw
+Something to file/grind steel: metal file, grinding wheel, Dremel

+Sand Blaster (optional)
+Drill Press (optional)

Catalyst Materials

+Angle Iron 1"x1", 15" length per catalyst
+Primer and Paint (optional)

Jig Materials

+Three threaded rods 20" length
+Twelve bolts that fit the threading
+Six large washers
+One length of aluminum corner bead

Step 2: Prepare Materials

The Catalyst itself will be constructed using angle iron. 

+Cut the angle iron into 5" segments. You will need three pieces of angle iron for each Catalyst.

+File down the corners and edges.

+Drill holes with a drill press. (optional)

+File metal burrs from holes.

Step 3: Prepare Jig

This jig will hold your angle iron in place while welding.

+Shape corner bead into equilateral triangles with each side measuring 10.750"

*** It is very important that each side of the triangle is the same length! You will get a lopsided catalyst if this is not right.***

+Screw the washers and bolts onto the threaded rod so they can hold your angle iron in place.

+Make sure the angle iron is centered on the rod and tighten the bolts

Step 4: Set Up Jig

Set Up

+Place the three threaded rods complete with angle iron between the corner bead triangles and twist in place. This may take a few tries.

+Rotate the threaded rods so that the angle iron lines up flush.

Step 5: Tack

+With the angle iron in the jig, tack weld each outside edge in place 

Step 6: Weld

+After tacking the corners, remove the catalyst and weld the inside edges. 

I have found that it works best to start at the bottom and drag the bead up to the corner.

Step 7: Finish

Now you have a catalyst!

You may finish this any way you like, but here is what I do:


+spray with white primer

Step 8: Build a WikiSeat and Share It With the World

This catalyst is a framework for building a seat, bench, table or work of art. Or maybe you have other plans in mind?

Check out  to share what you build and become inspired by others!



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    I like it and would like to make one but I can't weld, any suggestions??

    maybe this is a chance to learn?

    Yep, Madrigorne says JBWeld would work as a substitute for welding. You can also build a wooden catalyst by making tall hexagon shape from wood and running it through a table saw with a jig. If you're interested I can post a Instructable on how I did that.

    That would be rally nice, thanks

    I cant find the jig for this one anywhere so I made a quick sketchup model to help show the process.

    Step 1: make a hexagon blank by gluing four hexagonal pieces of plywood together. 

    Step 2: make a jig that will hold the hex blank.

    Step 3: Draw a (blue) line from corner to cattywompus corner on one face of the hexagon. Cut one side of the jig to the same angle as the first blue line.

    Step 4: Set table saw blade to 45° and slide the jig+blank through. 

    Step 5: Flip the hex blank and cut again.

    Step 6: Rotate the blank two faces and repeat steps 4 and 5.

    Step 7: Repeat step 6. 

    Please use a push stick and all appropriate safety gear while using the table saw. There is a lot of blade above the table for these cuts. Thanks!

    wood catalyst2.jpgwooden catalyst.jpgFileDSCN9841.jpg

    I think people lost the point of the instructable. The point was how to make the catalyst or the jig, not the three legged seat. Considering that you need to get the correct angles before welding anything together, and then hold them in place while you weld, this is a good little method that can be used over and over for producing the wanted angles.

    By the way, guys, there is a "be nice" policy here. If you don't like the instructable, please refrain from bashing the author.

    Totally agree with you hammer9876

    Well put. A public, 1200-word essay for "constructive criticism" is a bit out of place.

    Ok made one of these at the weekend, easy to do and will be great fun to make on a larger scale. Thanks for a good instructible.

    Just read through the whole Instructible and shown it to a colleague, we both noticed that you refer to 'bolts' when actually you mean 'nuts' which are used in the jig construction.
    Never the less this is still a lovely simple idea and would make a good starting point for a project. Excellent idea but the angles affect the height and the therefore the footprint and seat top size!
    Could be adpated for tables and other surfaces.