Challenges of Retrofitting an Existing Domed Stadium with a New Retractable Roof—BC Place Stadium, Vancouver, BC
Bibliographic record
Abstract
BC Place Stadium in Vancouver, BC opened in 1983 as the first domed stadium in Canada covered by the largest air-supported roof in the world. As part of a major revitalization project the stadium dome is being replaced with a new retractable roof structure. The new roof, designed and engineered by an international team, is under construction with completion scheduled in late 2011. The new roof, designed for the 1 in 100 year snow and wind loads and current seismic requirements, is supported by the original stadium superstructure. The new roof structure is a post-tensioned radial cable truss, clad with tensile membrane with a center retracting pneumatic membrane. The paper presents features of the new roof and addresses some of the unique challenges encountered in this unprecedented project. While the challenges overcome in the roof construction, now nearing completion, are worthy and manifold, this paper is limited to roof design due to required brevity. The roof construction will hopefully merit future publication.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.003 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".