Nine in the third place means:

The ridgepole sags to the breaking point.

This indicates a type of man who in times of preponderance of the great insists on pushing ahead. He accepts no advice from others, and therefore they in turn are not willing to lend him support. Because of this the burden grows, until the structure of things bends or breaks. Plunging willfully ahead in times of danger only hastens the catastrophe.