Thank you, SlideRuleEra (great user name, by the way) for answering to my question, and retired13 and STrctPono for the additional post after your first one.
And I am sorry that I didn’t reply in the last two weeks, but I was working in another project, besides I wanted to work more on this...
Thank you all, rb1957, phamENG, retired13, and STrctPono, dik, JAE, and EDub24, for the fast and useful replies, which have given me a lot of information but also concerns. I tried to answer to all your questions below, but most likely some of my answers are inadequate due to lack of time to...
I have been assigned the task to analyze the supporting structure of a gantry crane but, being a mechanical engineer, I need to find the applicable methods to determine shear forces and moments on all elements. The supporting structure of the movable bridge beam, as I show in the picture below...
