Iowa · answered by Verika · verified against sources
What slump is allowed for structural concrete on Iowa highway projects?
For structural concrete on Iowa highway projects, use a slump between 1 and 4 inches as a target range, allowing a maximum of 5 inches as a tolerance [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.