The interesting sphere-shaped elevators in the Gateway Arch in St. Louis are pulled up using cables. Let's assume the cables have a nominal diameter of
25mm
and that each cable supports
12kN
when the elevator is full. The cables have an effective modulus of elasticity
E=140GPa
. (Ignore cable weight)\ \\\\table[[\\\\table[[Properties of Steel Cables]]],[Nominal Diameter,Approximate Weight,Effective Area,Ultimate Load],[in.,
mm
,
l(b)/(f)t
,\\\\table[[
(N)/(m)