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Hello, last time I get very intereseted at structural optimization themes. I want to try optimize truss problem I've attached to topic. Can you suggest some books, articles or other materials which can help me with it...

thanks BAretired, all clear

here in attachment is this truss, cause it didn't load https://docs.google.com/file/d/0B_GdDFXsNx0IcUV2WTFFTm9NaHM/edit

Hello, first of all I am new on forum, so correct me if this folder is not ok for such question :) my problem is about zero stress rods at truss this is prabably right solution, bolded rods are not zero-stessed. As I start to match zero-stressed I understand, 1, 2, 3, but why 4th rod would be...