Thanks VERY much for the info and quick replies, jheidt and jjeng.
Garage is residential, slab on grade, and will be 3-1/2" thick. Original contract called for wire mesh but I wanted upgrade to rebar. Contractor recommended #4 but installed #3 and is charging for #3, saying #4 was not necessary.
I'm having a garage built and the contractor just put in #3 rebar, 24" on center. I want #4 at 12" on center. Contractor says no real difference. What is tensile strength comparison between what I have (#3, 24"oc) and what I want (#4, 12" oc)?
Ground is very wet after 4 days of rain. Temp is in...
