Idaho · answered by Verika · verified against sources
What are the rules for placing concrete in cold weather on Idaho DOT projects?
"b. Provide concrete that will have a temperature of at least 50°F and less than 80°F at the time of placing." [1] "2. Do not place concrete on frozen subgrade or use frozen aggregates in the concrete." [5] "Do not place concrete if the concrete temperature is greater than 85°F at time of placement . Do not place concrete when the evaporation rate is greater than 0.15 pounds per square foot per hour when tested in accordance with Idaho IT 133. Night or early morning placement may be necessary to avoid excess evaporation. Ice used as a part of the mixing water must be completely melted by the time mixing is completed." [5] "Do not place concrete on a surface with a temperature exceeding 90°F." [5]
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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.