North Carolina · answered by Verika · verified against sources
What are the rules for placing concrete in cold weather on North Carolina DOT projects?
Do not place concrete when air temp (shade, no artificial heat) is below 35°F without permission. If permitted, heat aggregates/water to ≤150°F, place concrete at 55–80°F, use ice-free aggregates, avoid frozen foundations. Protect concrete with heated enclosures (50–90°F) or insulation for 72 hrs (48 hrs for high-early-strength cement) if air temp ≤35°F or concrete <72 hrs old (48 hrs for high-early-strength). Use thermometers to monitor temps. Assume all risks for cold-weather placement.
Every answer carries its source — tap a citation to read the official document.
This answer came from Verika — an expert in your pocket. Ask anything, out loud or typed; answers come from your region’s regulations and your team’s own knowledge, cited to the source. If it isn’t in the sources, Verika says so.
Verika provides information with citations to help you find and understand the rules that apply to your work. It is not a substitute for professional engineering or legal judgment. Answer generated 2026-08-28; always confirm against the cited source for your project.