Poor maintenance blamed for Montreal collapse
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The collapse of a road bridge in Montreal, Canada, on 30th September 2006 has been attributed to salt corrosion of steel reinforcement in the deck. Heavy road salting created a corrosive mixture that penetrated the movement joint where the road deck slab met the cantilever supports. Debris started to fall at 11 am, but a highway patroller assumed it was not a structural threat and declared that the bridge did not need to close. The structure collapsed at 12.40 pm killing five people. The bridge was a half joint deck structure comprising two short cantilever spans supporting the bridge's central span on either side. Reinforcement corrosion would have caused shear failure of the concrete from the joint to the point of contact with the support. An expert from the highway service firm AccordMP said that the crumbling concrete falling onto the road was evidence of compression failure or sulphate attack. (A)
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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