replying to Robert Macy, Cynthia O. wrote:
I am only replying because others may read it....even though it is a 5-year
old question. Using rebar OR WWF (you don't need both) in concrete is not
only the right thing to do, but is the smart thing to do. Those who say it is
"old" do not know concrete and its ability to crack. Concrete has excellent
compressive strength, but poor tensile strength. Code requires certain
concrete applications to have either rebar or WWF (Welded Wire Fabric AKA
WWMesh). You put rebar rods in footers (on chairs), and you put WWF in slabs
(on chairs). This places the rebar / WWF off the ground, and into the
concrete where it is doing what it is supposed to do.

--
for full context, visit https://www.homeownershub.com/mainte...te-694985-.htm