1. The problem statement, all variables and given/known data I need to design a steel pole in 3 segments.The base segment needs to be 25 ft high , the second segment needs to be 15 ft and the third one 10ft high.So that when mounted on top of one another their total height will be 50 ft.Their diameters need to be within 1.6-7 inches. The load on the pole will be a 40 kg cabinet at 5 ft , a 1kg equipment at 10ft ,a 5.4 kg equipment at 35 ft, a 3.6 kg equipment at 40 ft and a 2kg light at the top height of 50 ft.The area where the pole will be mounted has a maximum wind speed of 110mph and there will be no snow.I need to calculate the loading on the pole and then calculate the required diameters of the segments and the steel gauge/metal thickness. Can anyone please help me with this. 2. Relevant equations 3. The attempt at a solution Going through the internet a solution that I came up with is to have a diameter of 6 inches and gauge 7(0.18 " /4.76 mm) sheet for the base 25 ft section. A 5 inches diameter and gauge 9 (0.15"/3.96mm) sheet for the second segment. A 4 inches diameter and gauge 9 (0.15"/3.96mm) sheet for the third segment. But I can not justify if this will bear the load and all. Also The segments will be joined to each other through plates and the pole will be joined to the ground through a base plate,anchor bolts and a foundation.