Issue link: https://geospatial.trimble.com/en/resources/i/1415420
august 2019 csengineermag.com 15 Updates were also made to strut and tie methodology (STM) that included the removal of bottle-shaped struts from the code and the inclusion of minimum reinforcing requirements in STM. Other STM improvements included curved-bar nodes and knee joints. Ease of Use While organizational changes were minimal, some new formatting features in ACI 318-19 enhance the document's usability. Full-color and three-dimensional illustrations are included, improving clarity. The index was expanded and interactive links were added to the online version of the document, in an effort to help users quickly find code provisions. Chapter 26, "Construction Documents and Inspection," has seen sig- nificant updates since 318-14. Inspection requirements are unified in this chapter, including the relocation of anchor inspection requirements from Chapter 17. The chapter now recognizes that projects may have roles for multiple design engineers and provides a framework for their coordination of work. As higher strength concretes have been devel- oped over time, using the standard definition of modulus of elasticity may not be adequate for certain projects. Therefore, the definition for modulus of elasticity was updated using data from external documents and best practices. For certain materials that are becoming common- place in the industry (such as alternative cements, crushed hydraulic- cement concrete or recycled aggregates), 318-19 Chapter 26 outlines precautions for designers who are considering their use. ACI 318-19 also identifies qualification training programs for inspec- tors/installers and lists certification requirements. By stating certifica- tion requirements directly in the code, the information becomes more easily accessible to engineers. Printed and digital formats of ACI 318-19 are available at concrete.org. Versions are available in inch-pound units, and SI units. ACI 318-19 is also available to subscribers of the online ACI Collection of Concrete Codes, Specifications, and Practices. Additionally, the Institute is host- ing public and in-house seminars to introduce users to ACI 318-19 – visit concrete.org for locations and to learn more. DR. JACK P. MOEHLE is the Chair of ACI 318 Building Code Committee and is the Ed and Diane Wilson Professor of Structural in the Department of Civil and Environmental Engineering at UC Berkeley. He has played a leading role in the development of building codes and professional engineering guidelines on subjects related to reinforced concrete and earthquake engineering. He is a Fel- low of the American Concrete Institute, Structural Engineering Institute of ASCE, and the Structural Engineers Association of California, and is an elected member of the U.S. National Academy of Engineering. StormRax BY Structural HDPE Products for all your Water Screening Needs. • 100% Maintenance Free • Light Weight • Chemical Resistance • Outstanding Strength • UV Resistant RE-ENGINEERED PEAK SERIES VISIT US AT: www.plastic-solution.com or CALL 1 (877) 877-5727 PYRAMID SERIES ROUND SERIES SLOPE SERIES FLAT SERIES BMP SERIES