Concrete capacity design of Cazaly hangers in shallow members
Why this work is in the frame
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Bibliographic record
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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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it