Foundation bolt layout got me good in Portland, lesson learned

Last month I was setting anchor bolts for a small deck addition in Portland and I trusted my tape marks instead of snapping a fresh line. Pour day came, the crew set the bolts, and when the mud cured I checked with a string line. Three of the six bolts were off by a half inch, too far for the Simpson brackets we planned to use. I had to chip out the concrete around those bolts, drill new holes, and epoxy everything over. Took me a full afternoon and about $60 in epoxy and rebar pins to fix. My takeaway is simple: always double check your layout against a reference line before the concrete shows up. Anyone else had to fix anchor bolt placement after a pour, and what did you do to keep it straight?

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