Abstract
This paper evaluates the behavior of the Cazaly hanger under vertical load and proposes an additional design requirement for the connection. In 1965, Canadian PCI instigated a research program to evaluate the behavior of the hanger, which led to the shear-friction design basis for the hanger in the third edition of the PCI Design Handbook: Precast and Prestressed Concrete. Current tests show that in shallow sections the hanger does not follow shear-friction behavior but instead behaves more closely to a concrete-breakout model. Reassessment of the 1965 specimens revealed shear-friction to be a poor predictor of capacity in shallow sections, while the concrete-breakout models provide conservative predictions. A proposed revision to the sixth edition of the PCI Design Handbook based on concrete-breakout capacity is recommended for Cazaly hanger design method.
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