2. tech-talk
  3. 134222-3884

DIY IKEA Lack Rack - Preparing the legs?

We are pulling together the parts to build my daughter her first audio rack on the cheap. Another post here about wooden racks brought to my attention some of you who have built racks from IKEA Lack tables, and I became very interested. I already have experience assembling an IKEA wall cabinet for my vinyl, so know that their composite materials are quite strong.

For the rack, you stack the tables up after cutting the legs to size that become your shelves. I want to spike the bottom of the legs, so that they stack up that way. The issue, is the core of the legs are hollow with inside dimensions of 1.75" x 1.75." Dimensional lumber like a 2"x 2" is only 1.5." My idea was using stock square lengths of turning wood that you can get 1.75" x 1.75.

Should I fill the entire length of the legs with the wood, or just insert a shorter piece into the bottom of the legs for the spikes? One of the benefits that's been said about the IKEA composite materials is low resonance even though it's strong. So, will adding a full length of wood to the core of the legs affect the resonance properties? I can go either way.
Kenny
kennythekey

Showing 6 responses by gdnrbob

gdnrbob
4,471 posts
 
Are the legs hollow? I thought they had fibreboard inside.

B
gdnrbob
4,471 posts
 
Funny you put up that link.
That is exactly what I would do. 
B
gdnrbob
4,471 posts
 
Gotcha.
If I were to undertake this project, I would try to find some wood with as close to the dimensions as possible. Fill the voids with some acrylic 2 part epoxy-It should come in a caulking tube that mixes as it gets pushed out.
Let it set up.
Drill out the holes for the T-nuts and put in some glue or more epoxy into the T-nut hole before installing.
Then get some spikes from Herbies.
I would also use some Herbies Fat Dots under the components or any other isolation product (Stillpoint, Synergistic, etc).
Are you sure you want to go with Lack? I use Besta for my components.
B
gdnrbob
4,471 posts
 
Kenny, can’t you cut the fiberboard to be 1/8" smaller than the leg? That shouldn’t require too much epoxy.
I was thinking of filling the leg with wood or fibreboard.
Those legs should be pretty firm. Maybe put some in the shelf,too.
B
Hmm, I wonder if you could
 make an epoxy slurry with sand and fill the legs with that.
gdnrbob
4,471 posts
 
The fact that the shelves are filled with corrugated fiberboard seems to make having non resonating legs a non issue. 
As this is a quick down and dirty solution, I would try to get the legs to accept the threaded discs and then put some other isolation products under the components. 
It's never going to be as good as a purpose built rack, but it should do the job. FWIW, I try to not get too caught up with making things perfect. It might make a
 difference, but usually nothing earth shattering.
B
gdnrbob
4,471 posts
 
Let me know how it turns out.
B
More to discover