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No. of Spans	14. (1 Main span, 2 side spans, 6 spans at the North Viaduct, 5 spans at the South Viaduct).
Plan Shape	Mostly straight with a curve at the South Viaduct.
Total Length	9151' (2789.2m). Main bridge spans are 1125' (342.9m), 4200' (1280.2m), and 1125' (342.9m). North viaduct spans are approx. 200' (61.0m) with a 347' (105.8m) anchorage housing. South viaduct spans range from 71' (21.6m) to 320' (97.5m).
Width of Deck	87.1' (26.5m) to 90' (27.4m).
Construction Date	1937 (several upgrades since 1937).
Instrumentation	1995. 69 accelerometers and 4 relative displacement sensors on the bridge, and a free-field station on the south side of the bridge. As of 2008, 100 accelerometers and 12 relative displacement sensors on the bridge, and geotechnical arrays on the north side and south side of the bridge.

Superstructure Type	Main span and side spans: suspended steel truss spans supported by braced steel towers. North and South Viaducts are mainly steel truss spans, with a steel arch span at the South Viaduct, supported by steel towers.
Substructure Type	Suspension spans: braced steel cellular shaft towers. 2 columns per tower. North and South Viaducts: braced steel towers and concrete pylons.
Foundation Type	Reinforced concrete piers support the main span towers.
Remarks	The bridge was instrumented under the agreement between the Golden Gate Bridge, Highway and Transportation District and DOC.


(Station Photograph - click to enlarge)	(Sensor Layout - click to see PDF File)