Name: greene Savannah, GA (Sunset 28) (Zone 8b) I have no use for internet bullies!
For the long side of the bed (10 feet) I drove a few short pieces of re-bar into the ground to prevent bowing - but there are no gas lines in my location. You might be better off with a wooden stake cut at an angle so not to damage the gas lines.
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~"Leaf of Faith"