How To scale all the element"s geometry?

I am trying to scale all the elements in the whole model in a single click. But when I try to do that i am getting the geometry and to covert those into elements is confusing for me. i can convert for one or two elements. but for each and every element how to convert that?? is there any way ??

I think a solid object are scale. you can filter a wall, floor, beam & column etc.