{"id":null,"ids":[],"kind":"named in documents","name":"Golden Gate Bridge stiffening trusses","tied_by":"name","block":null,"release":"v0.7.1","rows_columns":["t","id","year","y","date","kind","topic","outcome","summary","tier","source","leaf","scan","addr","quote","note","title","how","g","rec","sc"],"rows":[["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:15/10001",1962,1962,"","project","study or report",null,"Golden Gate Bridge stiffening trusses · other: restricted length live load 3,200 + 2,800 = 6,000 lbs. per ft. of bridge","unverified","C124899442",15,"https://archive.org/details/C124899442/page/n14",null,null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:15/4",1962,1962,"","finding","study or report",null,"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","unverified","C124899442",15,"https://archive.org/details/C124899442/page/n14","Golden Gate Bridge",null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:16/2",1962,1962,"","project","study or report",null,"Golden Gate Bridge stiffening trusses · other: restricted length live load 3,260 + 2,800 = 6,060 lbs. per ft. (Gronquist assumption)","unverified","C124899442",16,"https://archive.org/details/C124899442/page/n15",null,null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:16/3",1962,1962,"","project","study or report",null,"Golden Gate Bridge stiffening trusses · other: restricted length live load 3,300 + 2,800 = 6,100 lbs. (Paine assumption)","unverified","C124899442",16,"https://archive.org/details/C124899442/page/n15",null,null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:22/10",1962,1962,"","finding","study or report",null,"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","unverified","C124899442",22,"https://archive.org/details/C124899442/page/n21",null,null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:22/3",1962,1962,"","finding","study or report",null,"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","unverified","C124899442",22,"https://archive.org/details/C124899442/page/n21",null,null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:22/7",1962,1962,"","recommendation","study or report",null,"Golden Gate Bridge stiffening trusses · recommendation: A large percentage of chord members would have to be strengthened if rapid transit were installed","unverified","C124899442",22,"https://archive.org/details/C124899442/page/n21",null,null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:22/9",1962,1962,"","finding","study or report",null,"Golden Gate Bridge stiffening trusses · finding: Gronquist and Paine both report that strengthening of the chords would be necessary to various extents","unverified","C124899442",22,"https://archive.org/details/C124899442/page/n21",null,null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:24/6",1962,1962,"","recommendation","study or report",null,"Golden Gate Bridge stiffening trusses · recommendation: jack up stiffening trusses and insert shims between suspender sockets and bearings","unverified","C124899442",24,"https://archive.org/details/C124899442/page/n23",null,null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:26/2",1962,1962,"","finding","study or report",null,"Golden Gate Bridge stiffening trusses · finding: possible fatigue failures in truss connections after years of rapid transit traffic","unverified","C124899442",26,"https://archive.org/details/C124899442/page/n25",null,null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:30/1",1962,1962,"","finding","study or report",null,"Golden Gate Bridge stiffening trusses · finding: no reason to expect fatigue failures under highway loadings of the present type","unverified","C124899442",30,"https://archive.org/details/C124899442/page/n29",null,null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:30/2",1962,1962,"","finding","study or report",null,"Golden Gate Bridge stiffening trusses · finding: possible fatigue difficulties after a number of years of service with rapid transit loading added","unverified","C124899442",30,"https://archive.org/details/C124899442/page/n29",null,null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:30/4",1962,1962,"","recommendation","study or report",null,"Golden Gate Bridge stiffening trusses · recommendation: reduce stress fluctuation magnitude by careful addition of material in chords and web members","unverified","C124899442",30,"https://archive.org/details/C124899442/page/n29",null,null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:23/6",1962,1962,"1962","finding","study or report",null,"Golden Gate Bridge stiffening trusses · finding: More conservative stresses must be used to guard against fatigue failure of stiffening truss members under rapid transit","unverified","C124899442",23,"https://archive.org/details/C124899442/page/n22",null,null,null,"Report on proposed installation of rapid transit trains on Golden Gate Bridge","n","a",0,-1.0]]}