{"id":null,"ids":[],"kind":"named in documents","name":"Golden Gate Bridge center span","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/C124899442:11/2",1962,1937,"1937","building","study or report",null,"Golden Gate Bridge suspension spans · other: 21,300 lbs. dead load in center span as completed","unverified","C124899442",11,"https://archive.org/details/C124899442/page/n10",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/C124899442:11/5",1962,1961,"1961","building","study or report",null,"Golden Gate Bridge center span · other: present dead load of center span 22,900 lbs. per ft.","unverified","C124899442",11,"https://archive.org/details/C124899442/page/n10",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/C124899442:11/7",1962,1962,"","finding","study or report",null,"Golden Gate Bridge center span · other: center span dead load with reserve would be 23,700 lbs. per ft.","unverified","C124899442",11,"https://archive.org/details/C124899442/page/n10",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/C124899442:13/1",1962,1962,"","finding","study or report",null,"Golden Gate Bridge · other: total design dead load in the center span 25,700 lbs per ft","unverified","C124899442",13,"https://archive.org/details/C124899442/page/n12",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/C124899442:13/2",1962,1962,"","finding","study or report",null,"Golden Gate Bridge · other: original design dead load 21,000 lbs per ft","unverified","C124899442",13,"https://archive.org/details/C124899442/page/n12",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/C124899442:22/4",1962,1962,"","finding","study or report",null,"Golden Gate Bridge stiffening truss chords · other: Maximum calculated compression stress 29,300 lbs per sq in, 3,400 lbs per sq in above permissible value","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/C124899442:22/5",1962,1962,"","finding","study or report",null,"Golden Gate Bridge stiffening truss chords · finding: Maximum calculated tension stress 36,800 lbs per sq in, 4,800 lbs per sq in above allowable maximum","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/C124899442:24/1",1962,1962,"","finding","study or report",null,"Golden Gate Bridge rapid transit loading · other: deflection at center of center span 19.3 ft (under combined loads at 110° F)","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/C124899442:24/2",1962,1962,"","finding","study or report",null,"Golden Gate Bridge rapid transit loading · other: deflection reported by [name withheld] and [name withheld]: 18.2 ft","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,-2.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C124899442:24/3",1962,1962,"","finding","study or report",null,"Golden Gate Bridge navigation clearance · other: encroachment of up to about 9 ft on the 220 ft under-clearance","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/C124899442:24/4",1962,1962,"","recommendation","study or report",null,"Golden Gate Bridge navigation clearance · recommendation: ruling needed from the present Department of the Army on encroachment","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]]}