Hi Ron, The actual name is GAMBREL. If you're not familiar with advanced roof framing, I'd recommend purchasing premade trusses that will make your project much easier. Many local lumberyards, even Home Depot, now offers service to order trusses and the speed and ease of installing your roof system will certainly justify any additional material costs. You may be surprised just how inexpensive premade roof trusses are, including delivery to your site. Good Luck.