Greenhouse: Solar heating with 55 gallon drums of water, 2 by Solace

Solace wrote:
The six barrels are placed on level cement blocks, three per barrel and three of the four cattle panels are up.
1.Drums of water all lined up on the north side atop cement blocks, I ran rope behind a couple of big nails down around some of the barrels just in case of high winds. Due to pressure from the hoops, more support was placed behind the corner piers that already had rebar down in them into the ground. The angle iron had two 1" laser cut holes (done at the place where the angle iron was purchased, and nails were driven into those holes and bent over the edge of the angle iron in three places/three directions, again, in case of wind, which can blow 70 mph here at times.)
2. Three cattle panels are up, with zip ties to even them out. Panels are resting in the two 8' rails of angle iron with 1" sides.