Cummins12V98 wrote:
Pour 4" of 6 sack concrete with 6x6 wire mesh over 6" washed pea gravel. Pea gravel requires NO compaction, it goes down at 100 Percent.
Poured my RV pad like that 15 years ago and it still looks great.
You got lucky.
6X6 mesh isn't enough. 4X4 minimum and I use 4X4 rebar.
Wet ungraded gravel is better than pea gravel because there is less air space.
They use CA-6 for roads for a reason; almost no air space.
They use reinforced concrete when strength is important.
I'm amazed that someone advising NO reinforcement in concrete in CHICAGO is still in business.