I've just finished building a Trash Can Smoker. Here it is:

I bought the bin from here: http://www.dockerills.co.uk/wt911-galva ... -x-24.html
It's a large bin measuring 18 inches x 30 inches. Really sturdy too. Lid was rubbish though - really flimsy. I bought a new sturdy one for £13
Here is my charcoal box. It's a 35cm stainless steel roaster with holes on the side. It comes with a grill but I cut out slots on the bottom too. It stands on 7cm bolts. This charcoal box holds 3kg of Big K Briquettes and around 2kg of lumpwood.

Ash pan is a 70p oven tray from ASDA.

Here is the air inlet. It's a 1/2 inch ball valve. There are 2 more 1/2 inch air vents on either side of the smoker. These are simply 1/2 inch tank connectors with screw on blanks.

I used 2cm thick stove rope around the lid to create a tight seal.

Grill is from an old BBQ we had in the garden. Water pan is a baking tray we had in the kitchen. This is a pork shoulder I smoked last week. (first attempt... made a few mistakes... I don't want to talk about it...)

Chimney is a piece of piping a friend gave me.
OK... so I smoked a whole Jerk Chicken and sausages yesterday. Used 2kg of lumpwood and some oak chippings. Started a few coals up in the chimney and added them to the charcoal box. Put the lid on the smoker and added the chicken and sausages when it was at around the 180F mark. It took around 50 mins - 1 hr to reach the desired 250F mark. I plugged the 2 side vents and closed the ball valve slightly. Temp stayed between 235F - 250F for the 4 hours I was cooking for. Held temp amazingly well. After the cook, I shut all valves and chimney.
Today, I weighed the leftover coal in the charcoal box. Looks like I only burned 1kg of lump yesterday. Seems pretty good to me: 1kg lumpwood = 4 hrs of smoking.
Total cost of build is around £75. You could do it cheaper but I urge you not to cheap out on the bin. I Initially bought a cheapo bin from Ebay and it was a thin and flimsy piece of crap.
All in all, I'm over the moon with my new smoker!
P.S... about the galvanised steel thing... Zinc's melting point is 419.5 °C and its boiling point is 907 °C. My smoker will never go over 150c. I've heard that acid can lead to the zinc leeching. So... I won't be using any acid based sprays on my meats.


