Originally Posted by chicagokenji
I currently build a track about 110x50 feet every Sunday in a parking lot, it's been mainly electric TC and Trans Am. We're just starting to allow nitro this weekend.
I'm using 1.5 inch PVC for the infield. the system now uses a 1x2 furring strip about 12 inches long inside the two pipes secured together using two drywall screw in both pipes once they are joined together. It hold great with no seam. We use 1 5/8ths silcone tubing about a 12 inch length for connectors, jammed into two pipes to create bends, securing that with one drywall screw into each pipe.
I'm seeing some of you say you are going to use PVC downspout. I have a couple of questions. What's your projection on the cost for your particualr sized track, and what do you plan to use to connect each 10 foot piece together and what will be used for angles and bends?
Some of the reasons I went with 1.5 inch PVC:
ease of assembly using my above system (less time to setup/knockdown)
not much breakage to vehicles
less spaced when stored (our track get's setup and knocked down each day)
Our outdoor track is permanent, so that makes things easier for me.
From my estimates, it should cost about $1-$1.50/foot of material. (It comes in 10' lengths and costs between $10-$15 per length). Our club will probably spend between $300 - $500 on materials total. We'll create joints using plywood that will attach inside the pipes. I'll either contact grocery stores, or areas that have conveyor belts this winter to see if they have any worn out belts they would be willing to give us. If that fails, we'll get some via mcMaster Carr or another supplier, or I'll go visit the local hardware store for potential materials. For curves, I haven't solved that problem yet. I may use flappers, or purchase 45* or 90* connectors for the downspout. But I'm not sold on that since that would create a seam. I'm hoping to get a closer look at the Montana's track system this winter when I visit them.
For securing to the ground, I'm going to start with industrial velcro strips and sand bags. I may also investigate backing it with boards screwed into the pavement if option #1 fails. Really hard to say at this point. On our current track, the PVC is secured by nailing the pipe into the pavement.
Our track uses Trex boards (recycled plastic mixed with sawdust) which are very forgiving for the outside barriers. We'll keep the round pipe for the NASCAR turns as it provides a smooth curve and is seamless through the entire turn. As a non-profit we can normally get scrap wood such as what we hope to use for the connectors from our local hardware store.