I must disagree on the safety issue. Can it be done, yes, is it safe? If the piece is less than 5' and is setup properly, yes, if it is on a good stationary = heavy table saw with good support, and you know what you are doing, and what to watch out for. Hell I can cut a radius on a table saw, would I EVER allow one of my guys to do it, no. Anything over 5' and you are asking for bind witch is never good, and you will never get a god cut on anything with any real length. And cross cuing anything on a portable table saw is asking for trouble.