California · answered by Verika · verified against sources
What are the rules for placing concrete in cold weather on California DOT projects?
Record temps hourly with redundant sensors; discontinue only if max internal temp is falling, temp diff < allowable for 3 days, and no adjacent mass concrete. Max internal temp ≤160°F; max temp diff per thermal control plan. Use mechanical cooling systems (complying with plan) embedded in mass concrete; pressure test cooling pipes at 30 psi for 30 mins before placement. Grout cooling pipes post-cooling with ASTM C1107/C1107M or C827/C827M nonshrink grout. Remove non-compliant mass concrete.
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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.