T&S Steel in Plain Concrete?

[ToadJones]

If I am designing a footing and the it works according to plain concrete design in ACI 22.7, is T&S Steel still required?

My Concern is that the footing/block will crack, but T&S Steel @ 0.0018 still seems heavy.

The design is basically a ballast block sized for overturning.
4ft x 10ft in plan and around 20" thick.

 

[TXStructural]

spats, the commentary on section 22 says that plain concrete should only be used structurally where it remains in compression. The application we are discussing places a net tension on a cross section of unreinforced concrete. It also says that plain concrete should be limited to members for which "random cracking" is acceptable and ductility is not an essential feature.

 

[spats]

TxStructural... I hear what you're saying about the commentary, but 22.2.1 says you qualify by virtue of paragraphs(a), (b) OR (c). Why would 22.7 specifically address footings, and talk about factored moments, if bending is not allowed? As I said in my earlier response, I use Chapter 22 all the time for designing my continuous strip footings for bending in the short direction if less than about 5' wide, and I know quite a few engineers that do the same. Chaper 22 allows a flexural stress of only 164 psi for 3000 psi concrete... seems pretty conservative to me.