Thank you for your excellent article in STRUCTURE magazine on “‘edge barrier walls” in parking structures. We need more of these type practical articles ̶ this is especially important for young structural engineers. In Figure 1, the #4 standard hook is not developed in a six inch wall ̶ reference CRSI Reinforcing Bars: Anchorages and Splices. In the past twenty years or so, I have investigated parking structure problems and found most serious structural issues to be related to connections. Thanks again and good luck.
Larry G. Mrazek, P.E., S.E.
Chesterfield, MO