New York · answered by Verika · verified against sources
What are the rules for placing concrete in cold weather on New York DOT projects?
No concrete shall be placed when ambient air temperature is below 45°F without Engineer approval [3]. Preplacement meetings between Oct 1–Apr 1 must review cold weather operations, including environmental conditions, curing methods, and mitigation plans [1]. Concrete temperature must be ≥45°F when in contact with steel/reinforcement, ≥35°F when in contact with earth/rock [3]. Evaporation rate must not exceed 0.25 lb/sf-hr, and curing temperatures must be acceptable [1]. Approval required for all placements in cold weather [1,3].
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