# Thickness from Moment of Inertia

Hi guys... I am creating a parametric spreadsheet to predict the behaviour of a sign post when subject to a specified wind speed for a uni assignment . Currently half way through creating the spreadsheet and one of the questions requires me to calculate a wall thickness of the pipe using the moment of inertia.. is this possible? if so how? please help guys all solutions are welcome :)!

Thanks

PhanthomJay
Homework Helper
Gold Member
The moment of inertia of the pipe depends upon its wall thickness and diameter. The larger the diameter, the smaller the required thickness. Once you determine I, you may have to choose amongst available sizes and strengths, with economics also in mind, amongst other considerations.

Mechanical-909
The moment of inertia of the pipe depends upon its wall thickness and diameter. The larger the diameter, the smaller the required thickness. Once you determine I, you may have to choose amongst available sizes and strengths, with economics also in mind, amongst other considerations.

Okay thank you. Guess my question is that, is possible from the equation: PI/64*(Od^4 - Id^4) Od being outside Diameter and Id being the inside diameter.

PhanthomJay