Maryland · answered by Verika · verified against sources
What are the rules for placing concrete in cold weather on Maryland DOT projects?
Use tarpaulins, insulating devices, or approved heaters to enclose and protect concrete when air temp ≤40°F; maintain concrete ≥50°F for 7 days; avoid heating >100°F; cool concrete uniformly over 24h after heating. Record temps with thermometers. Preheat reinforcement to ≥40°F if ambient ≤40°F. Stop work if storms forecast.
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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.