Grover1,
The author of the metal building book emphasizes that placing reinforcing across control joints will only leave you with cracks not at the control joints.
DaveAtkins,
The reference i used for slabs on grade states that reinforcing should always be stopped across a control joint...
klipper brings up an excellent point that I haven't seen anyone address in any of these forums about hairpins. I know hairpins are commonly used, but what about control joints and their affect on the load transfer? Most if not all of the reinforcement in a slab is supposed to be stopped...