Ohio · answered by Verika · verified against sources
What are the rules for placing concrete in cold weather on Ohio DOT projects?
When placing concrete in cold weather on Ohio DOT projects, ensure concrete temperature is at least 50 °F (10 °C) but not greater than 70 °F (21 °C) at placement. Heat water, aggregate, or both as needed. Place concrete against materials above 32 °F (0 °C), heating forms, reinforcing steel, or foundation materials if necessary. Maintain concrete surface temperature between 50–100 °F (10–38 °C) for at least 5 days, then reduce temperature at a rate not exceeding 20 °F (11 °C) in 24 hours until within 20 °F (11 °C) of atmospheric temperature. Use heated enclosures, insulated forms, or flooding for curing, except for deck slabs <10 inches (250 mm) thick when temperatures are predicted to fall below 33 °F (0.5 °C), where more than just insulated forms are required. Install high-low thermometers to monitor deck bottom, fascia, and top surfaces.
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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.