The plans show one hour fire resistant walls of 14` high. It shows 5/8″ Type X gypsum wall board on both sides of 2″ x 4″ wooden studs. Intermediate horizontal fire stopping is required at what vertical height?

The plans show one hour fire resistant walls of 14` high. It shows 5/8″ Type X gypsum wall board on both sides of 2″ x 4″ wooden studs. Intermediate horizontal fire stopping is required at what vertical height?