ACI 550.6-19 (SI) PDF Download

ACI 550.6-19 (SI) is a standard that applies to structures located in regions with high seismic risk or structures designated as having high seismic performance or design categories. The standard addresses the use of unbonded post-tensioned precast structural walls (shear walls) in cases where they do not fully meet the requirements outlined in Chapter 18 of ACI 318-14. The document includes both mandatory acceptance criteria and nonmandatory commentary to provide guidance on the use of these precast walls.

The standard outlines the procedures for designing unbonded post-tensioned precast test modules and their configurations. It also specifies requirements for testing, reporting, and evaluating the satisfactory performance of these test modules. The commentary section of the standard provides additional references and supporting evidence to supplement the acceptance criteria.

Notably, the standard does not compare the research results of precast test modules that meet the requirements of ACI 318 with those that meet the acceptance criteria outlined in this standard. However, such comparative research, both experimental and analytical, is available in the references provided in the commentary section.

The format of the document follows that of ACI 318-14, with section numbering used to reference specific sections. The commentary section follows the same numbering system, but with numbers preceded by an "R" and the text presented in italics to distinguish it from the corresponding sections of the standard.