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Well, what is important to know (maybe) is the way the heavy armor were made and the fact it was rigid, the major part of the weight was - in fact - mostly dispersed on the floor and not actually carried by the knight.
But ! There is something which has a heavy weight : Hauberks and coats of mail. As they aren't rigid, the weight was directly on the shoulder.
But ! There is something which has a heavy weight : Hauberks and coats of mail. As they aren't rigid, the weight was directly on the shoulder.