Tower Structure - Stone masonry Suspension Bridge.
Installment of Tolls acceptable.
360 degree views.
Distance of roadbed above water - 135 feet
Height of Towers above high water- 276½ feet (JSG)
Height of Towers above roadway - 159 feet (JSG)
Height of Tower Arches above roadway - 117 feet (JSG)
Source of Granite - Quarries of J.R. Bodwell, Hallowell, Maine. (1872).
(The same stone was used in Tombs prison and the reservoir in Central Park)
Suspension Cables - four 15 3/4" diameter wire ropes.
Number of Strands in each cable - 19 (JSG)
Total Length of Wire in cables - approximately 3600 miles (JSG)
Miles of wrapping wire on each cable - 243 miles 943 feet (JSG)
Number of Suspenders - 1520 (JSG)
Number of Diagonal Stays - 400 (JSG)
Inventor and manufacturer of steel wire cable - John A. Roebling
Tested cable wire strength - 160 ksi
Dead weight of deck and suspenders - 13,240 kips - 3,410 kips per cable.
Maximum load on single cable (Live and Dead Load) - 6,000 kips
Ultimate strength of cables - 24,600 kips
Cable factor of safety - 24,600/6,000 = 4.1
Maximum cable sag - 130 feet
Brooklyn Bridge East River Span - 1595.5 feet
Supported land span - 930 feet.
Length of Brooklyn Approach - 971 feet
Length of New York Approach - 1562½ feet
Official Length end-to-end - 5,989 feet, 1.13 miles.
Width of Bridge Floor - 85 feet (JSG)
Width of Elevated Promenade - 15 feet 7 inches (JSG)
Height of Promenade above roadway - 11½ feet (JSG)
Thickness of wooden walkway boards - 1½ inches
Grade of roadway - 3¼ in 100 feet (JSG)
Total Weight of Bridge, excluding caissons, towers, anchorages - 14,680 tons (JSG)
World Record Status at Time of Completion:
Fifty percent longer than any suspension bridge (total length).
First use of pneumatic caissons.
First Steel Cable Suspension Bridge.
Date New York saloonkeeper Steve Brodie claimed to have made a daredevil plunge from the Bridge into the East River - July 23, 1886
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