A rafter might split when heavier roof tiles are installed or if the rafter has inconsistent grain or excessive knots.
Hip roof rafter repair.
Over time roof rafters can wear crack or rot and replacements may be in order.
The successful distribution of loads due to the peculiarity of the location of the main diagonal angular and hip rafters ensures high resistance of the entire system to deformation under the action of external application of forces.
Very easy to do.
This video shows how to repair a split rafter.
With the proper tools anyone can do this.