I have to second Camo's post.

8 years ago My Dad put a beauty of a hole right through his wood deck due to the surface temperature on the bottom of the smoker. Caught the deck on fire and burnt right through the floor boards and the joist. Close call cause the house could have easily caught on.

The solution: Put down a few sqaure brick pavers underneath the smoker to act as a heat barrier.
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You know something bad is going to happen when you hear..."Hey, hold my beer and watch this"