Oregon · answered by Verika · verified against sources
What are the rules for placing concrete in cold weather on Oregon DOT projects?
Do not place concrete if air temp is below 40°F on placement day or forecasted for 7 days (14 for decks) unless an approved Cold Weather Plan is submitted. The plan must ensure concrete temp stays ≥50°F using methods like heated enclosures or insulated forms, and maintain ≥60°F concrete placement temp. Keep forms, reinforcement, and foundations frost-free. Use heated water (≥70°F, ≤150°F) or aggregates (≤80°F concrete temp) if needed. Monitor with 24-hour thermometers. For bridge decks, ensure no precipitation is forecast within 2 hours before/after placement and evaporation rate <0.10 lb/sq ft/hr [1].
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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.