ACI/PCI 319-25- Code Requirements and Commentary-ACI-PCI_319_Presentation

ACI-PCI_319_Presentation_Handout

Pdf Summary

The document provides an overview of the ACI/PCI 319-25, a structural precast concrete code, highlighting its development, key provisions, and historical context. ACI/PCI 319-25 is a collaborative code between the American Concrete Institute (ACI) and the Precast/Prestressed Concrete Institute (PCI), encapsulating both past and contemporary standards for precast and prestressed concrete.<br /><br />The document begins with learning objectives, focusing on reviewing the historical development of codes for precast concrete, understanding the ACI/PCI 319-25 code structure, and foreseeing future updates.<br /><br />The history section outlines the inception of prestressed concrete in the US with the Walnut Lane Memorial Bridge, the chartering of PCI in 1954, and key developments over the decades, such as the PCI Design Handbook in 1971 and PCI becoming an ANSI standards developer in 2014. The document elaborates on collaborations between ACI and PCI beginning in the late 1950s, which integrated prestressed concrete provisions into existing codes.<br /><br />The code structure and design standards are explained, addressing seismic concerns, precast components, and structural integrity. New design provisions include torsion design, corbel design, and dapped end beam design, among others. The intermediate precast structural walls section details connection and joint requirements as part of seismic-force-resisting systems.<br /><br />The text also mentions unresolved issues such as the ledge design and opening in thin webs, deferred to future code cycles for additional research. The document acknowledges contributions from numerous volunteers and staff at PCI and ACI, highlighting an ongoing commitment to evolving standards. Additionally, mention is made of future webinars and appreciation extended to contributors as preparations for the next code cycle begin.

Keywords

ACI/PCI 319-25

precast concrete

prestressed concrete

structural code

seismic design

design provisions

historical development

PCI Design Handbook

collaboration

future updates