Needed to tie the roof together where the rafters are framed at an angle to each other.
													
																	Roof overbuild framing. 
									
		
	
	
		
	
	
		
	
	
		
	
																	Over framing is when you frame a roof section on top of another roof section such as when joining a l shaped roof with each section at right angles to each other etc. 
																	The exposed edges of the 3 layers of rigid insulation are no longer exposed. 
																	A third gable roof is joined to a main roof in an overbuild remodeling situation. 
																	Rafters act more like the top chord of a roof truss than as a roof joist. 
															
													
									
		
	
	
		
	
	
		
	
	
		
	
																	Use of rafters trusses and a truss base polyline are demonstrated. 
																	Line length is the hyptenuse of the triangle whose. 
																	In a rafter roof all of these components are required to provide a stable roof. 
																	1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches. 
															
													
									
		
	
	
		
	
	
		
	
	
		
	
																	The rafters carry the applied loads to the exterior walls. 
																	Also a link to elevations of house. 
																	Box beam gable framing new gable overhang is framed in the form of a box beam hanging off of a new layer of roof plywood roof sheathing cantilevered over the top of the 3 layers of rigid insulation. 
																	If the unit of rise in inches is 3 then the cut is the unit of rise and the unit of run 12 inches or 3 12.