Structural performance of finger-jointed black spruce lumber with different joint configurations
Why this work is in the frame
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Bibliographic record
Abstract
In Eastern Canada, black spruce (Picea mariana (Mill.) B.S.P) is used for producing engineered wood products. However, little information is available on the influence of finger-joint configuration on the structural performance of this species. The purpose of this work was to evaluate the behavior of finger-jointed black spruce for three joint configurations: feather, male-female, and reverse. Isocyanate adhesive was used for all types of joints studied. All of the three joint configurations performed well and strength values were found to meet the Canadian standard requirements. Significant differences were found for bending strength between the three joint profiles. The same trend was observed for tension strength but differences were not statistically significant. The analysis indicated that the feather configuration performs better than male-female and reverse profiles, especially for horizontal structural joints. In tension and bending tests, wood failure was mostly produced along the joint profile but with some failure at the finger roots, indicating an excellent performance of the gluelines.
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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