I am curious why so thick? You are holding up a bit more than 30
pounds/SF. Hand batching that much sack goods will have you worn
out. 15-20 bags of 80 #. Normal sack goods makes about 2500 PSF
concrete if you don't add excess water (most people do).


______________________________
Keep the whole world singing . . . .
DanG (remove the sevens)




"mook Johnson" wrote in message
...
I'm going to be pouring a 3 x 5 slab 8" thick. 2" below ground
and 6" above. It will need to support about 500lbs.

I'll be using quikrete for this. Do you think I'll need rebar
for this small slab?