1. The problem statement, all variables and given/known data I have a steel angle (40 x 40 x 5mm) which is welded to box section either side it is 1000mm in lenght. It will have have load of 45kg on it (point load). I need to find the maximum deflection of this beam, which i think will come under a fixed-fixed type beam. 2. Relevant equations i assume i need the young modulus of this material and the moment of inertia to be able to work this problem. 3. The attempt at a solution I am lost in where i have to start with this, how do i find the moment of inertia(do i need to find the neatral axis?) and what is the bes method of finding the deflection out . Any starting point would be useful this is a project for college where i am designing a storage device and this part will be holding a slider for the drawers, however for the drawers to function properly there needs to be minimum deflection. if i am wrong please say, this is all a learning curve for me.