This Construction Brief will give you an overview of ISO's Construction Class 1 — frame construction. When you've completed this course, you'll know what an ISO report means when it says a building is frame construction. And you'll understand why a particular structure is — or isn't — frame.
Buildings with exterior walls, floors, and roofs of combustible construction — or buildings with exterior walls of noncombustible or slow-burning construction with combustible floors and roofs.
Frame buildings generally have roof, floor, and supports of combustible material, usually wood, and combustible interior walls.