{"id":null,"ids":[],"kind":"named in documents","name":"Golden Gate Bridge tower","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/C124899442:21/1",1962,1962,"","finding","study or report",null,"Golden Gate Bridge tower shafts · finding: calculated stresses exceed permissible values in about 400 ft of tower, including 80 ft to 300 ft above base","unverified","C124899442",21,"https://archive.org/details/C124899442/page/n20",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/C124899442:21/2",1962,1962,"","finding","study or report",null,"Golden Gate Bridge tower shafts · finding: silicon steel axial stress 20,200 psi calculated vs 18,000 psi permissible at about 80 ft below top","unverified","C124899442",21,"https://archive.org/details/C124899442/page/n20","80 ft",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/C124899442:21/3",1962,1962,"","finding","study or report",null,"Golden Gate Bridge tower shafts · finding: excess of 2,200 psi over permissible stress at about 80 ft below top","unverified","C124899442",21,"https://archive.org/details/C124899442/page/n20","80 ft",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/C124899442:21/4",1962,1962,"","finding","study or report",null,"Golden Gate Bridge tower shafts · finding: carbon steel axial and bending stress 20,400 psi calculated vs 18,000 psi permissible at about 300 ft below top","unverified","C124899442",21,"https://archive.org/details/C124899442/page/n20","300 ft",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/C124899442:21/5",1962,1962,"","finding","study or report",null,"Golden Gate Bridge tower shafts · finding: excess of 2,400 psi over permissible stress at about 300 ft below top","unverified","C124899442",21,"https://archive.org/details/C124899442/page/n20","300 ft",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/C124899442:21/6",1962,1962,"","finding","study or report",null,"Golden Gate Bridge tower shafts · other: originally specified maximum permissible axial stresses: 14,000 psi carbon steel, 18,000 psi silicon steel","unverified","C124899442",21,"https://archive.org/details/C124899442/page/n20",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/C124899442:21/7",1962,1962,"","finding","study or report",null,"Golden Gate Bridge tower shafts · other: average tested yield points 40,800 psi carbon steel and 52,400 psi silicon steel","unverified","C124899442",21,"https://archive.org/details/C124899442/page/n20",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/C124899442:21/8",1962,1962,"","recommendation","study or report",null,"Golden Gate Bridge tower shafts · finding: permissible values should not be exceeded when rapid transit is added","unverified","C124899442",21,"https://archive.org/details/C124899442/page/n20",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/C124899442:22/1",1962,1962,"","finding","study or report",null,"Golden Gate Bridge tower shafts · finding: Gronquist concludes the towers will require no reinforcing for the addition of 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/C124899442:22/2",1962,1962,"","finding","study or report",null,"Golden Gate Bridge tower shafts · finding: Reinforcing of tower shafts to bring stresses within permissible limits would be impracticable","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/C124899442:24/8",1962,1962,"","finding","study or report",null,"Golden Gate Bridge tower piers and anchorage blocks · finding: sufficient strength and stability to sustain additional rapid transit forces","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/C124899442:25/8",1962,1962,"1962","finding","study or report",null,"Golden Gate Bridge cables · finding: Greater angular changes of cables at tower saddles would require careful study","unverified","C124899442",25,"https://archive.org/details/C124899442/page/n24",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/C123303273:30/5",1990,1973,"1973","finding","study or report",null,"Caltrans 1973 Earthquake Design Criteria for Bridges (applied to Golden Gate Bridge tower) · finding: spectra reduction factor of 4 used to account for plastic action","unverified","C123303273",30,"https://archive.org/details/C123303273/page/n29",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,4.0],["d","qipu:sf/decision/journalofjulydecproceed77sanfrich:703/2",1982,1982,"1982-12-20","motion",null,"passed","Supervisor Molinari urged the Chief Administrative Officer to display a 1933 Golden Gate Bridge tower replica in City Hall's rotunda.","quoted","journalofjulydecproceed77sanfrich",703,"https://archive.org/details/journalofjulydecproceed77sanfrich/page/n702",null,null,null,null,"n","a",0,2.2],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:31/3",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower end-restraint · finding: tower end-restraint assumed by Baron cannot possibly be attained","unverified","C123303273",31,"https://archive.org/details/C123303273/page/n30",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:33/2",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower bases · finding: Tower bases (particularly the tie-down assemblies) endangered by major earthquake","unverified","C123303273",33,"https://archive.org/details/C123303273/page/n32",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,3.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:33/5",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower connections · finding: Connections between cable saddles and tops of towers may be vulnerable","unverified","C123303273",33,"https://archive.org/details/C123303273/page/n32",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:56/1",1990,1990,"","recommendation","study or report",null,"Golden Gate Bridge tower base connections · recommendation: Tower base connections shall develop strength demand of the applied load in a ductile manner","unverified","C123303273",56,"https://archive.org/details/C123303273/page/n55",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:57/4",1990,1990,"","finding","study or report",null,"Golden Gate Bridge Tower/Pier connection · finding: shear capacity under uplift may be critical","unverified","C123303273",57,"https://archive.org/details/C123303273/page/n56",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:62/1",1990,1990,"","building","study or report",null,"Golden Gate Bridge main bridge · other: Nonlinear local model of tower base and concrete pier connection","unverified","C123303273",62,"https://archive.org/details/C123303273/page/n61",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:62/2",1990,1990,"","building","study or report",null,"Golden Gate Bridge tower · other: Detailed local tower model with nonlinear filament model at base","unverified","C123303273",62,"https://archive.org/details/C123303273/page/n61",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:62/4",1990,1990,"","building","study or report",null,"Golden Gate Bridge tower · other: Nonlinear tower model assesses tolerance of relative longitudinal ground movement between tower and anchorage","unverified","C123303273",62,"https://archive.org/details/C123303273/page/n61",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:64/10001",1990,1990,"","building","study or report",null,"Golden Gate Bridge main tower shaft · other: 96 hold-down steel angles riveted to tower shaft web plates","unverified","C123303273",64,"https://archive.org/details/C123303273/page/n63",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:64/10002",1990,1990,"","building","study or report",null,"Golden Gate Bridge main tower shaft · other: 78 steel dowels providing positive shear connection","unverified","C123303273",64,"https://archive.org/details/C123303273/page/n63",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:65/3",1990,1990,"","building","study or report",null,"Golden Gate Bridge main tower shaft · other: hold-down angles pre-stretched to 105 kip before riveting","unverified","C123303273",65,"https://archive.org/details/C123303273/page/n64",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:65/4",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base rivet connection · other: shear strength of 16 double-shear rivet connection","unverified","C123303273",65,"https://archive.org/details/C123303273/page/n64",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:65/5",1990,1990,"","finding","study or report",null,"Golden Gate Bridge stiffened tower web plate · other: buckling stress level of stiffened web plate (42 in. wide, 7/8 in. thick)","unverified","C123303273",65,"https://archive.org/details/C123303273/page/n64",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:65/6",1990,1990,"","finding","study or report",null,"Golden Gate Bridge hold-down steel angle group · other: yield strength of hold-down steel angle for each group of four angles","unverified","C123303273",65,"https://archive.org/details/C123303273/page/n64",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/1",1990,1990,"","building","study or report",null,"Golden Gate Bridge tower base connection · other: constraint axial load of 70,870 kip (tower weight and vertical cable load)","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/2",1990,1990,"","measure","study or report",null,"Golden Gate Bridge tower base connection · other: initial elastic rotational stiffness Kz = 3,300,000,000 kip-ft/rad","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/3",1990,1990,"","measure","study or report",null,"Golden Gate Bridge tower base connection · other: initial elastic rotational stiffness Kx = 860,000,000 kip-ft/rad","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/4",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base connection · finding: at base rotation of about 0.0003 rad, riveted hold-down connections sheared off and partial uplifting occurred","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/5",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base connection · finding: average filament compressive stress reached buckling level at base rotation of about 22 x 10-4 rad, ductility factor about 7","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/6",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base connection · finding: yield moment at initial rivet shear failure Mzy = 900,000 kip-ft","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/7",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base connection · finding: yield moment at initial rivet shear failure Mxy = 300,000 kip-ft","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:69/2",1990,1990,"","measure","study or report",null,"Golden Gate Bridge tower · other: measured modal damping 1.3% at period 1.332 sec, longitudinal mode 1","unverified","C123303273",69,"https://archive.org/details/C123303273/page/n68",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:69/3",1990,1990,"","measure","study or report",null,"Golden Gate Bridge tower · other: measured modal damping 2.2% at period 2.184 sec, transverse mode 1","unverified","C123303273",69,"https://archive.org/details/C123303273/page/n68",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:71/1",1990,1990,"","finding","study or report",null,"Golden Gate Bridge · other: Rigid-support response spectrum analysis; 100 modes included in the analysis","unverified","C123303273",71,"https://archive.org/details/C123303273/page/n70",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:71/2",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower · finding: Highest mode natural period 1.2246 sec, which may be too long for some critical tower members","unverified","C123303273",71,"https://archive.org/details/C123303273/page/n70",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:71/3",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower · finding: Maximum base moment from longitudinal earthquake 2,400,000 kip-ft, above the 900,000 kip-ft base moment capacity for initial rivet shear failure","unverified","C123303273",71,"https://archive.org/details/C123303273/page/n70",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,3.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:71/4",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower shaft · finding: Longitudinal shear in tower shaft increases from 5,113 kip at about roadway level to 12,517 kip at the base","unverified","C123303273",71,"https://archive.org/details/C123303273/page/n70",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:71/5",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower and side span · finding: More than 90% of longitudinal response caused by the 62nd mode, period 1.86 sec","unverified","C123303273",71,"https://archive.org/details/C123303273/page/n70",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:71/6",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower shaft · finding: Maximum shear at top of tower shaft, just below the cable saddle, induced by longitudinal earthquake","unverified","C123303273",71,"https://archive.org/details/C123303273/page/n70",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,3.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:86/2",1990,1990,"","building","study or report",null,"Golden Gate Bridge tower base shaft · other: base shaft dimension 54 ft by 33 ft","unverified","C123303273",86,"https://archive.org/details/C123303273/page/n85",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:86/3",1990,1990,"","building","study or report",null,"Golden Gate Bridge tower concrete pier · other: concrete pier dimension 90 ft by 134 ft","unverified","C123303273",86,"https://archive.org/details/C123303273/page/n85",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:86/4",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base connection · finding: rotational ductility factor of the base section about 7","unverified","C123303273",86,"https://archive.org/details/C123303273/page/n85",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:87/1",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower · finding: Incremental nonlinear analyses were conducted to establish the degree of damage at the tower base under the maximum credible earthquake input","unverified","C123303273",87,"https://archive.org/details/C123303273/page/n86",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,3.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:87/2",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower · other: Displacement responses due to the upper level earthquake obtained by scaling the results by 60%","unverified","C123303273",87,"https://archive.org/details/C123303273/page/n86",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,3.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:87/3",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower · other: Displacement responses due to the lower level event scaled by a scale factor of 25%","unverified","C123303273",87,"https://archive.org/details/C123303273/page/n86",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:88/1",1990,1990,"","measure","study or report",null,"Golden Gate Bridge tower longitudinal restraint (side span cable) · other: equivalent spring stiffness 15,700 kip/ft","unverified","C123303273",88,"https://archive.org/details/C123303273/page/n87",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:88/2",1990,1990,"","measure","study or report",null,"Golden Gate Bridge tower longitudinal restraint (main span cable) · other: equivalent spring stiffness 5200 kip/ft","unverified","C123303273",88,"https://archive.org/details/C123303273/page/n87",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:88/5",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower · finding: stress distributions at 25% and 60% of full displacement correspond to lower and upper level events","unverified","C123303273",88,"https://archive.org/details/C123303273/page/n87",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/1",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Shear failure of riveted hold down connections first occurred at 26% of full displacement amplitude","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/10",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Rotational ductility demand at tower base about 4 under maximum credible earthquake","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,3.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/2",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Rivets would fail in shear at normal tensile stress of 2.97 ksi","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/3",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Maximum compressive stress in cells of the base 14.6 ksi at 26% displacement","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/4",1990,1990,"","event","study or report",null,"Golden Gate Bridge tower base · finding: At 34% of displacement amplitude all rivet connections on southern side sheared off","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/5",1990,1990,"","event","study or report",null,"Golden Gate Bridge tower base · finding: About one third of the base section uplifted at 34% displacement","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/6",1990,1990,"","event","study or report",null,"Golden Gate Bridge tower base · finding: At 58% of displacement amplitude half of the base section uplifted","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/7",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Maximum compressive stress in cell 23.8 ksi at 58% displacement","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/8",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Maximum stress at base at full displacement amplitude 33 ksi in compression","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/9",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Maximum base moment in nonlinear structure about half of linear elastic prediction","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:63/2",1990,1990,"1990","building","study or report",null,"Golden Gate Bridge tower base · other: boundary spring coefficients established from nonlinear base behavior, accounting for rivet shear failure and base plate uplift","unverified","C123303273",63,"https://archive.org/details/C123303273/page/n62",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:93/1",1990,1990,"1990","finding","study or report",null,"Golden Gate Bridge tower · finding: Maximum stress at the tower base is reduced to about half of the elastic stress","unverified","C123303273",93,"https://archive.org/details/C123303273/page/n92",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:95/1",1990,1990,"1990","finding","study or report",null,"Golden Gate Bridge tower base (West Shaft) · finding: Rivet failed in shear or Base plate uplifted","unverified","C123303273",95,"https://archive.org/details/C123303273/page/n94",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:97/1",1990,1990,"1990","finding","study or report",null,"Golden Gate Bridge tower · finding: tolerates about 3 ft relative movement at the top before significant nonlinearity at the base","unverified","C123303273",97,"https://archive.org/details/C123303273/page/n96",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:97/2",1990,1990,"1990","recommendation","study or report",null,"Golden Gate Bridge tower · finding: sufficient capacity to tolerate relative support movement in the order of 1 ft between the tower pier and the anchorage","unverified","C123303273",97,"https://archive.org/details/C123303273/page/n96",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:97/5",1990,1990,"1990","finding","study or report",null,"Golden Gate Bridge tower · other: P-6 moment at base for 3 ft top displacement contributes about 20% of total base moment","unverified","C123303273",97,"https://archive.org/details/C123303273/page/n96",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:30/1",1990,1990,"December 1977","finding","study or report",null,"Golden Gate Bridge tower (Baron report review) · finding: maximum tower stresses reduced from 54.2 to 51.6 ksi compression after correcting section distance","unverified","C123303273",30,"https://archive.org/details/C123303273/page/n29",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:30/2",1990,1990,"December 1977","finding","study or report",null,"Golden Gate Bridge tower (Baron report review) · finding: Baron incorrectly assigned infinite moment of inertia to the 32 ft high base section of the tower","unverified","C123303273",30,"https://archive.org/details/C123303273/page/n29",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:30/3",1990,1990,"December 1977","finding","study or report",null,"Golden Gate Bridge tower (Baron report review) · finding: Baron's analysis assumes absolute fixity at tower bottom, giving a base moment of 3,916,650 ft. kip","unverified","C123303273",30,"https://archive.org/details/C123303273/page/n29",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:30/4",1990,1990,"December 1977","finding","study or report",null,"Golden Gate Bridge tower base connection · finding: complete fixity at tower base is unrealistic because embedded angle connection has less moment capacity than assumed","unverified","C123303273",30,"https://archive.org/details/C123303273/page/n29",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:69/1",1990,1990,"Present Study","measure","study or report",null,"Golden Gate Bridge tower · other: 1.452 sec first longitudinal tower mode (Present Study)","unverified","C123303273",69,"https://archive.org/details/C123303273/page/n68",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0]]}