I am in the process of designing a bunkbed for a caravan as my 2nd year mech eng design project. I have come up with a design show in the link ---Deleted---

Im thinking of using a sliding lock mechanism very much similar to the one shown here ----Deleted---. These are meant for drawers though so would it be possible to attach these vertically to the wall of the caravan. The bunk weighs approximately 12kg and when in use should be able to support a user weight of 90kg - could someone please give me an idea and suggestions as to how i would go about the neccessary force calculations to determine how to design the two swing down supports i have in my initial idea. Would 2 of these slide rails be able to support this load in use?

Thanks for the help, much appreciated
Cabellos