HELLO, I'M NEW HERE... I HAVE A QUESTION I WAS HOPING SOMONE COULD AIDE ME WITH... WHAT I NEED IS A FORMULA PROCEDURE FOR THE FOLLOWING SENARIO... I HAVE 4 STEEL PLATES, "THKNESS AND TYPE VARIES FOR THE PLATES" THAT IS WELDED TOGETHER TO MAKE A STEEL RECTANGULAR BOX BASICALLY... IN THIS BOX...