NRC Errata: How Code Editions Get Quietly Corrected Between Updates

Between full code cycles, the National Research Council periodically issues errata — formal corrections to typos, cross-reference errors, or genuine drafting mistakes discovered in a published code edition. These aren't new requirements; they're fixes to the existing text, and they're dated and published separately from the main code document.

It's a detail that matters if you're working from an older printed copy or a PDF that was downloaded before a correction was issued — the "current" edition of a code can be quietly different from what's sitting in a folder on your desktop. Checking for the latest errata is a small habit that avoids building from a known mistake in the text.