Air-Permeability Factor for Wind Loads on Loose-Laid Pavers on Flat Roofs
Why this work is in the frame
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Bibliographic record
Abstract
Installation of open-joint roof paver systems with pedestals on flat roofs leaves a cavity between pavers and roof deck, allowing the development of cavity pressure. The cavity suction on roof pavers reduces the net wind uplift and overturning. This study conducted pressure measurements of the paved roof of a large-scale building model using the University of Western Ontario’s WindEEE Dome. The air-permeability factor was evaluated as a ratio of directional envelopes of peak net-pressure coefficients of the paved roof to peak external pressure coefficients of the bare roof. The air-permeability factors varied with pavers’ location across the roof, and wind uplift load decreased 40% for pavers in the corner and edge roof zones. Moreover, pressure tests conducted on roofs with high perimeter parapets showed that air-permeability effects of pavers and shielding effects of perimeter parapets can be treated as independent aerodynamic factors for evaluating the net uplift wind loads on rooftop pavers. Therefore the overall effect can be obtained simply by multiplying the roof pressure on bare flat roofs by air-permeability and parapet factors.
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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