STRUCTURES Outcome 3 The stress in a steel wire supporting a load of 8 kN should not exceed 200 N/mm2. Calculate the minimum diameter of wire required to support the load.
Force Stress = Area
Area =
Area =
Force Stress
d=
Area =
8000 200
d=
Area = 40mm 2
πd 2 4
4A
π 4 × 40
π
d = 7.14mm