Tag Archives: Post-tensioned concrete

What is new in ACI 301-20, Specifications for Concrete Construction

January 12, 2021

The new American Concrete Institute (ACI) 301-20, Specifications for Concrete Construction, provides the latest construction practices and concrete-related material information necessary for today’s contract documents.

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The curious case of pour 1B: Investigation of concrete strength and durability issues

September 18, 2018

Concrete slab pour 1B was supposed to be routine, occurring early in the construction of a parking garage in the Midwest. However, low compressive strength issues led to lengthy and costly project delays, as well as some interesting theories about the causes.

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The Track to Span 3: Genesis of the innovative Manhattan West Platform

August 1, 2014

The Manhattan West Platform is the first stage in a vibrant urban development that will serve as the foundation for public and new commercial space. This article discusses the unique structural challenges in designing an innovative platform structure over the tracks leading into New York City’s Penn Station.

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