Email contact@concretecounts.com.
Especially welcome:
- Corrections — a number that’s wrong, out of date or missing a caveat. Please include the source.
- Calculators you wish existed.
- Cases where a result didn’t match what you actually used on a job.
Fixes to published figures are logged on the sources page.
ConcreteCounts can’t give advice on a specific structure — for that, ask your building department or a licensed engineer.