Concrete driveways--joints?

[hotinhawaii]

Anyone have experience pouring or having a concrete driveway poured? I am specifically wondering about the need for stress joints in a driveway on a slope and is about 80x10'. Do there have to be joints or at least scored lines? How often? How deep? Is it standard practice to do this?

[topograph]

Concrete will naturally crack in roughtly square sections; the joints are put in to control the locations. Since your driveway is 10' wide, you would tool joints every 10', to a depth of approximately a 1/4 of the concrete thickness.

[David M]

An 80X10, it's not IF it might crack, but WHEN. Ours is scored.

David

Ninole Resident

[DanielP]

4" slab: 9'x9' square.
10' wide: score down the middle and across 8' o.c. 1 1/2" deep. Within 24 hrs. This from a siminar I attended 10 yrs. ago.

Dan