Securing stacked tires?

[sneeky]

One section of my haunt this year is a "junkyard" theme. I want to have sections of stacked tires acting as walls, tunnels etc. What is the best way to make sure they don't fall over, just bolt them together as we stack them? Anyone have some good hands on experience with this?

[screamforadream]

You'll want to have a center pole to limit movement/toppling, and as you go, a cheaper method is to get a ton of industrial super thick zip ties (or cable ties, whatever you prefer to call them). Just drill a hole from tire to tire and zip tie them together nice and tight, just don't do it too close to the edge.