There are downward forces at the midpoints of the two upper beams, and equal upwards forces at the midpoints of the two lower beams, right?Alright, I will review that.
I have another question if you are willing and able. Do bolts affect the shear and moment force diagrams for beam loading/deflection at all? I have dug through 4 of my text books and scoured the internet but haven't found anything to explain it.
See attached pic if you don't mind. http://imgur.com/a/MuJTc
There are 4 beams, the two smaller ones on top of the two longer ones and bolted together using two bolts per connection. In the center of each beam there is a load acting on it. How are the shear/moment diagrams affected, or are they?
The bolts are, to a first approximation, redundant. They only come into play as the bending of the beams twists the corners from the horizontal, no?