Thank you for your insight Jack, very well explained and straight to the point.
Indeed this is very helpful for getting my head around how it is possible to determine lateral forces on tapered ramps.
I'm still at school, working on being a technician. No certifications yet, I'm turning to the internet for this problem because the teacher told us to use forums for help understanding certain issues, (there are a lot of students, so he can't be there for all)
This is for a school project where...
Yes, indeed it simplifies things and takes us one more step away from reality.
But I have not been informed to take this into account, therefore I'm guessing it is minimal movement.
(though minimal movement with 12 tons will always create big results haha)
Lets start simple, and add variables...
Summary:: 12 ton rectangular frame is lowered by a 4 point crane attached to each corner of the frame.
Frame will be lowered onto plastic supports, these supports have guiding ramps of 60 degrees to help the operator lower the frame in the correct spot.
The frame has 4 feet, one on each corner...