Angle Limit for Splitting Beam Axes

In the below example, there are 3 beam axes with 0, 45 & 70 degrees respectively
When the angle is set to 30 degrees (default), only 1B1-1B2-1B3 will be combined into single beam design axis while the rest will be split to separate axes (as below)
When the angle is set to 50 degrees, only 1B1-1B2-1B3 & 1B4-1B5-1B6 will be combined into single beam design axis while the rest will be split to separate axes (as below)