A garage door spring, some cable and some cable clamps. One set each per side. Home made and dangerous. Spring needs to be contained to prevent injury for when the spring or the cable fails, and they will fail. Each and every component will fail over time. Trust me.
Spring needs to be contained for the entire length of it's travel when gate is down.
On second thought, this design might use just the garage door spring as anchor points don't seem to far apart. Use at your own risk.
"Thanks dad, you gave me courage, wisdom, honesty and strength. I will truly miss you, my friend."
Last edited by captken; 12-17-2012 at 06:36 AM.