Bodyweight is not the key there, it is height, the number of floors is not enough. Around 10 stories + is in the higher end of 90-100% fatality rate, anything below that is risky and not worth it. 4 is not enough at all. You can end in a worse and lot more painful situation.
I don't know what brought you here, but I'm sorry you are considering these questions, hope it gets easier for you, big hugs <3