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Suspension Bridge Design Considerations and Math
80 Foot Bridge - Suspender Calculations

Distance to
middle of bridge
Beam size Suspender Wire length
0.00 in = 0 ft 0.00 in 2x6 48.00 in = 4 ft 0.00 in 156.00 in = 13 ft 0.00 in
24.00 in = 2 ft 0.00 in 2x4 48.16 in = 4 ft 0.16 in 156.32 in = 13 ft 0.32 in
48.00 in = 4 ft 0.00 in 2x6 48.65 in = 4 ft 0.65 in 157.29 in = 13 ft 1.29 in
72.00 in = 6 ft 0.00 in 2x4 49.46 in = 4 ft 1.46 in 158.91 in = 13 ft 2.91 in
96.00 in = 8 ft 0.00 in 2x6 50.59 in = 4 ft 2.59 in 161.18 in = 13 ft 5.18 in
120.00 in = 10 ft 0.00 in 2x4 52.05 in = 4 ft 4.05 in 164.09 in = 13 ft 8.09 in
144.00 in = 12 ft 0.00 in 2x6 53.83 in = 4 ft 5.83 in 167.66 in = 13 ft 11.66 in
168.00 in = 14 ft 0.00 in 2x4 55.94 in = 4 ft 7.94 in 171.87 in = 14 ft 3.87 in
192.00 in = 16 ft 0.00 in 2x6 58.37 in = 4 ft 10.37 in 176.74 in = 14 ft 8.74 in
216.00 in = 18 ft 0.00 in 2x4 61.12 in = 5 ft 1.12 in 182.25 in = 15 ft 2.25 in
240.00 in = 20 ft 0.00 in 2x6 64.21 in = 5 ft 4.21 in 188.42 in = 15 ft 8.42 in
264.00 in = 22 ft 0.00 in 2x4 67.62 in = 5 ft 7.62 in 195.24 in = 16 ft 3.24 in
288.00 in = 24 ft 0.00 in 2x6 71.36 in = 5 ft 11.36 in 202.71 in = 16 ft 10.71 in
312.00 in = 26 ft 0.00 in 2x4 75.42 in = 6 ft 3.42 in 210.84 in = 17 ft 6.84 in
336.00 in = 28 ft 0.00 in 2x6 79.81 in = 6 ft 7.81 in 219.63 in = 18 ft 3.63 in
360.00 in = 30 ft 0.00 in 2x4 84.54 in = 7 ft 0.54 in 229.07 in = 19 ft 1.07 in
384.00 in = 32 ft 0.00 in 2x6 89.59 in = 7 ft 5.59 in 239.18 in = 19 ft 11.18 in
408.00 in = 34 ft 0.00 in 2x4 94.98 in = 7 ft 10.98 in 249.95 in = 20 ft 9.95 in
432.00 in = 36 ft 0.00 in 2x6 100.69 in = 8 ft 4.69 in 261.39 in = 21 ft 9.39 in
456.00 in = 38 ft 0.00 in 2x4 106.74 in = 8 ft 10.74 in 273.49 in = 22 ft 9.49 in
474.00 in = 39 ft 6.00 in 2x4 111.50 in = 9 ft 3.50 in center of tower


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