Golden Gate Bridge stiffening trusses
Named in the records1962
14 records of San Francisco tie this place, 1962: 0 decisions of the Board of Supervisors and 14 facts read from city reports. Open the full list, with filters for years, kind and outcome.
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- Records
- 14: 0 Board decisions, 14 facts from city reports
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- 1962
What the records say
All 14 records, in date order. The one-line summaries were written by a language model from the printed page; open the page to check the wording.
| When | What the record says | Outcome | Source |
|---|---|---|---|
| 1962 | Golden Gate Bridge stiffening trusses · other: restricted length live load 3,200 + 2,800 = 6,000 lbs. per ft. of bridge | project | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
| 1962 | Golden Gate Bridge stiffening trusses · other: Restricted-length live load 3,200 + 2,800 = 6,000 lbs. per ft. of bridge, length 1,200 ft or less | finding | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
| 1962 | Golden Gate Bridge stiffening trusses · other: restricted length live load 3,260 + 2,800 = 6,060 lbs. per ft. (Gronquist assumption) | project | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
| 1962 | Golden Gate Bridge stiffening trusses · other: restricted length live load 3,300 + 2,800 = 6,100 lbs. (Paine assumption) | project | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
| 1962 | Golden Gate Bridge stiffening truss chords · other: Chord steel specimen tests averaged 53,300 lbs per sq in against minimum yield point of 45,000 lbs per sq in | finding | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
| 1962 | Golden Gate Bridge stiffening trusses · finding: Calculated stresses exceed permissible stresses in about 40% of all chord members in the center span under rapid transit | finding | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
| 1962 | Golden Gate Bridge stiffening trusses · recommendation: A large percentage of chord members would have to be strengthened if rapid transit were installed | recommendation | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
| 1962 | Golden Gate Bridge stiffening trusses · finding: Gronquist and Paine both report that strengthening of the chords would be necessary to various extents | finding | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
| 1962 | Golden Gate Bridge stiffening trusses · recommendation: jack up stiffening trusses and insert shims between suspender sockets and bearings | recommendation | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
| 1962 | Golden Gate Bridge stiffening trusses · finding: possible fatigue failures in truss connections after years of rapid transit traffic | finding | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
| 1962 | Golden Gate Bridge stiffening trusses · finding: no reason to expect fatigue failures under highway loadings of the present type | finding | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
| 1962 | Golden Gate Bridge stiffening trusses · finding: possible fatigue difficulties after a number of years of service with rapid transit loading added | finding | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
| 1962 | Golden Gate Bridge stiffening trusses · recommendation: reduce stress fluctuation magnitude by careful addition of material in chords and web members | recommendation | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
| 1962 | Golden Gate Bridge stiffening trusses · finding: More conservative stresses must be used to guard against fatigue failure of stiffening truss members under rapid transit | finding | City report: Report on proposed installation of rapid transit trains on Golden Gate Bridge scanned page ↗ |
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