The USG Boral Drywall Grid Suspension System is an engineered framing system that installs faster than conventional channel framing methods. It is ideal for framing both interior and exterior flat ceilings and more complex shapes such as stepped soffits and coffers. The system is fully compatible with all USG Boral DONN acoustical suspension systems for easy transition from plasterboard ceilings to acoustical tile ceilings. Proprietary components allow easy design and installation of bulkheads and upstands and change of planes.