The rafters can be attached 16 on center to the ridge beam using rafter ties.
													
																	How to put a roof above my porch. 
									
	
		
	
																	These boards are the roof support boards. 
																	Hand framing a porch roof involves first setting the ridge beam and the side walls to the proper height that the roof will hang from. 
																	On a two story house you can usually tie the ledger into a band joist also called a rim joist located between the floors as shown below. 
																	Once it is plumb mark the position on the porch roof. 
															
													
									
	
		
	
																	Stand a post up in the bracket and hold a level on its side. 
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																	Screw these boards into the 144 inch boards perpendicularly. 
																	Attach a 96 by 6 by 1 inch pine board to each chalk line on the 144 inch boards connecting the two 144 inch boards. 
															
													
									
	
		
	
																	Position a mounting bracket at one of the marks on the bottom of the porch. 
																	Install another bracket in this position.