If my thinking is correct... you should score the broken side also. Since it is the main beam, it shouldn't matter if it is less then an inch due to the break as it does when measuring a tine or sticker point that is less then an inch. Tine or stricker point less then an inch can't be used in the score. Measure the length and circumference of the broken main beam and add to score. Should give you at least 3 more inches to your score.

I know an official scorer on another forum and will double check with him to make sure I am right. If the broken side can be score, you should also be able to measure an inside spread from it and add that to the score.

Tim