Pennsylvania · answered by Verika · verified against sources
What are the rules for placing concrete in cold weather on Pennsylvania DOT projects?
Discontinue concreting when air temp (away from artificial heat) falls to 40F (45F for accelerated strength concrete); resume only when air temp rises above 40F (45F). Place concrete at 50F–90F; avoid water >90F contacting cement before mixing. Do not place on frozen base/subbase/subgrade or use materials with frost/lumps. Maintain concrete temp between 50F–150F during curing, using heating/canvas/insulation to keep air >50F and <80F during placement/curing [3,5].
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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.