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Turn a large cable spool into a pretty nifty dwelling for ducks, or for just about any other outdoor critter!

Step 1: Materials

A local construction site was giving away four large cable spools, and we grabbed them before we knew exactly what we were going to do with them, because they are cool. After a bit of staring and scribbling, we realized that one of the spools could become the upgraded duck house we needed, due to our abundance of ducks.

About spools: I was told that usually a construction company will pay a deposit of $50 USD or more per spool to the cable manufacturer, then return the spool when empty. We were lucky because in our case the manufacturer didn't want their spools back, so they became a nuisance and the foreman put them up on Craigslist for free. But when you see empty ones, never assume they're free and just swipe them, that's weaselly. In many cases you'll find that they are for sale at a reasonable price or for free, but you've got to play nice and ask. Electric companies, phones companies and cable TV providers are all possible sources for spools.

Materials
-spool: the one I used was four feet in diameter, and 32 inches tall. The inner "barrel" was two feet across.
-misc. wood: sourced from free palettes, acquired (by asking nicely) from lumber yards and furniture stores.
-galvanized drywall screws
-filler
-paint
-varnish
-"door" hardware: hinges, handle, latch.

Tools
-circular saw
-jigsaw
-driver/drill
-hole saw drill bit (two sizes)
-screwdriver (or chisel, if you're one of those "right-tool-for-the-job" snobs)
-vise grips
-socket wrench
-sander
-paint brush

Step 2: Disassemble spool

Having never played with them before, I was pleasantly surprised at the elegance of the engineering of these spools: an enormously heavy and rugged apparatus held together by only six bolts!

Granted, these are bolts to be reckoned with: 32" long, steel. They sit spaced between fourteen curved slats an inch and a half thick and about six inches wide, all resting in a recessed slot routed into each of the round sides of the spool, to define the inner "barrel."

So all you need to do to take the spool apart is remove the bolts. Sounds simple enough, right? Well, it may very well be, if your spool didn't have too rough a life before it found its way to you. In that case, all you have to do is sit the spool on its "wheels," render either the nut or the bolt head stationary with some vice grips or a wrench (and perhaps a friend to wield it, unless you have an enormous wingspan), and loosen from the other end with your socket wrench. The slats will slide out and fall as the bolts loosen. Then all you have to worry about is crushing your toes or fingers or skull or fine china or small pets when the last bolt gives way and the heavy round chunks succumb to gravity. But if only a little rust is present, plan on using a great deal more profanity and other rust-battling measures.

Step 3: Make new bolt holes

At each end of the bolts, there's a "top hat" washer (but a curved one... perhaps more of a "derby?") about two inches across, nestled in a deep recess. For this design, we need to move the bolts from the inner slot to the outer edge, which means we need new holes for our washers.

I figured out where to drill by drawing lines from the center point of the round, across an existing bolt hole, and out near the edge. 

I cut a shallow hole using a 2" hole saw, then a deeper one with the same center point using a 1-1/2" hole saw.

The wood between the hole saw cuts was easily chiseled away (I used a screwdriver, not a chisel - don't tell, okay?) until the washer had a comfortable place to sit.

After the recess was roughly shaped to the contours of the washer, I drilled the hole for the bolt itself. Note: It's important to do this after you use the hole saw bits, because a hole saw needs wood to "bite," and would slip around dangerously if you were to drill the bolt hole first. 

I repeated this for all six bolts on both sides of the spool, for a total of twelve new holes.

Step 4: Loosely assemble

At this point I replaced a couple of slats and loosely fit all of the bolts. What I discovered was:
First, my measurements weren't perfect, so some of the bolts were a tiny bit misaligned. Not a big deal: that's why they invented hammers.
Second, the bolts were, in fact, long enough to work even when not sitting in slots. See, in moving the slats to the outside, I was increasing the overall height by about an inch, because I didn't route out slots for them in their new positions out at the edge. Luckily there's enough play in the threading and length of the bolts that I didn't need to route a slot to make it all fit, but that might be worth doing if you have the tools and the inclination.

Careful not to smash my toes or fingers or skull or fine china or small pets, and happy that I wouldn't have to go back and deepen all of the bolt hole recesses, I dropped the cumbersome assembly down onto its "bottom" for the next steps. 

Step 5: Add the boards

I placed the original "load-bearing" boards in groups near the big bolts. When tightened, the bolts "pinch" the boards for a nice strong joint. A few screws keep the boards in place.

Various (mostly 1"x4") slats harvested from palettes filled in the remaining gaps.

Step 6: The door

The door had to be big enough to comfortably reach inside the house for cleaning, egg stealing, and such. And I was so impressed with the sturdiness, I ended up removing a bolt and making the door as wide as the span between the two adjacent bolts.

I started by tracing the arc onto some boards, and sticking them together to make an assembly reminiscent of a rocking horse, that rocked rather well and made me kind of want to make a rocking horse. But I didn't.

I temporarily hung the rocking-horse-looking frame into place, accidentally putting the hinge on the right side when I meant to make the door open the other way.

I took it off and added more slats, so that it started to look like a medieval shield of some kind, and made me kind of want to make a medieval shield. But I didn't.

In retrospect, I should not have maintained a nice arc; I should have flattened the arc where each slat touches it. That would have made attaching them much easier. You really should do that if you make one of these.

I hung the door, and added a handle and a latch.

Step 7: Fill & paint

The sides got a quick sanding and an even quicker coat of varnish. I filled the big internal gaps, painted the inside brown and the top green, and carved out a duck-sized entrance.

Since this house will be placed in a large aviary-like enclosure (see photo) safe from raccoons and other predatory beasties, and since ducks don't just sleep all night like chickens, the duck entrance didn't need a door. So it didn't get one.

It did get a ramp, though - made from palette wood, and just sort of parked up against the duck door.

And that's it!

The ducks love it, and so does the occasional cat.

Update: the duck house just got a new addition: a bench/cabinet that sits on top. See it here:
http://www.instructables.com/id/Cable-Spool-Bench-with-Storage/

Cheers!

<p>this is sweet! I just so happen to have a good amount of pallets and spools! i see a project coming.... thanks for the idea </p>
<p>This is so awesome I was going to use an old dog house for our 2 ducks but I love this and I have a spool just siting in my yard! Did you need to add supports on the inside of the little arched door? </p>
<p> A bit of bad information at the end. It says you do not need a door at the entrance. True, you don't if you want something to kill your ducks. <br><br> Very cute build, but PLEASE for the good of your ducks, add a door</p>
Hi Stonykill, I appreciate your concern and would absolutely add a door if this structure were just &quot;in my yard,&quot; but it's in an enclosed aviary setup with a decent dog patrol who keeps the raccoons and skunks away. No foxes or other predators. Plus, the ducks have guns.
<p>Great design. Do you know australian ducks cannot keep a gun unless fully trained and locked up (the guns I mean). Try explaining this little set up to an Aussie police officer!</p>
<p>Ducks with mad skillz. YES! :) </p>
<p>This. Is. Fabulous. <br>I have been searching for the best way to make a couple of duck houses for the girls to lay in, and to give them shelter when the weather warrants it. <br>You pegged it....and I am able to get some of these local to me. <br>**excitedly jumps around** <br>Thank you for this share! </p>
Where did you find a cable spool
Thanks for the idea! I just finished one of these made for my dogs!!
Wow, a "why didn't I think of that" project. I have one of these sitting around all of the time. My call ducks are about to get a mansion. Thank you.
Great up cycle !!!<br/>
Awesome
This is a great use of an empty spool. This design could be adapted to make any type of storage or furniture. Look out next time I come across some of these! Nice Instructable.
Thank you! <br> <br>I'm going to make a half-round, half-height version that sits on top of the existing house, for use as both storage space and a bench for the kids to sit on as they commune with the ducks. <br> <br>Except for tables, much of the furniture I've seen made from spools seem a bit cumbersome, but the cylinder shape got me thinking of stacking options: make two of these &quot;barrels,&quot; chop big circles out where they touch, and you'd have a barrel as tall as a human. You could turn that into an outdoor shower or a sauna or outhouse or spray-tanning booth or darkroom or phone booth or giant beer can... <br> <br>Cheers!
Mmmmmm........giant beeeeeeeer.......
Absolutely BEAUTIFUL ! <br>Makes me wish I'd picked up the spool I spotted on Craigslist a month ago. . . next time then. . . . <br>And I love the &quot;occasional cat&quot; !
Great idea, and plenty more potential uses. Would certainly be sturdier than my current chicken coop which is slowly rotting in the garden. <br>I'd possibly have added some Lino or similar to the floor of the coop sealed around with silicone to aid cleaning, maybe I'll do that with mine. <br>Very inspirational.
We're can I get em<br/>Here in da city it might be near impossible to get a spool
&quot;Electric companies, phones companies and cable TV providers are all possible sources for spools,&quot; but they can still be challenging to find because everybody wants to make a table when they see one. I'd say find businesses with full ones and leave your contact info for when they're empty. The other challenge (at least for the big ones I used), is transportation: they're really big and really heavy. <br> <br>Best of luck!
zomrgerd love this!
Thanks!
This is so cool. I visit sites where they always have empty spools. I think I've found my next project!!
Awesome, and thank you!

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