The load is maximum during the first ten or twenty degrees folding, when we are starting to lift the mainhull and tramps (together with the water that entered the mainhull), from the water surface.

Now that you mentioned pulling the amas together, I guess the best way to do it would be with a pulley connecting the shrouds about 2 o 3 meters high. The mechanics of this system guarantys maximum tension in the shrouds when the pulley starts to be tensioned, exactly when we need it. Later, as the shrouds are deflected by the pulley, the tension is progressively reduced.

I'll try to sketch the idea and post it.