Title: What to Expect with Concrete Deflections - 1 PDH
While advances and innovation in concrete design and construction have heralded new levels of building achievement, we are still limited by the realities of using a material comprised primarily of water, cement, aggregate, and steel: the “unknowns” are many, and the “knowns” are typically in the form of a range of values. Hence, predicting deflections of concrete members, which is a function of many “unknown” and “known” factors, is hardly a simple task. “Precision” and “concrete” are two terms that are difficult to reconcile, and, recognizing this truth, engineers should analyze, design, and communicate accordingly.
This presentation outlines a number of ways in which real-world considerations—construction tolerances—can render the most detailed deflection calculations nearly meaningless, and possibly cause problems for the project. The presentation will close with recommendations for designers to consider implementing into their practice to produce better outcomes.
Bio: Dylan Freytag, P.E.
Dylan Freytag, P.E., is a founding Principal of Pivot, a structural engineering consulting firm in Austin, TX. Dylan specializes in structural investigations, repair, and strengthening—buildings, arenas, marine structures, parking structures, hospitals, and fluid-containing structures. Dylan has led forensic investigations on structures throughout the United States and abroad. He is chair of ACI Committee 435, Deflection of Concrete Structures.
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