I guess I should have made it clear that this is just a bridge that's part of my driveway, leading up to my house. The only traffic on it is me & the missus goin out for bread and beer. Hope to get away with that 6" under these cirumstances.
Where should rebar be placed in a 6" concrete bridge deck? A friend is suggesting 2 layers of rebar, one about 2" below the top surface, the other 2" above the bottom. Are 2 layers really necessary?
What is the best spacing to use between the bars?
This is a vehicle bridge...