Shipwrights were the original american timber framers.
													
																	Timber frame roof details. 
									
	
		
	
																	Figure 2 2 roof framing terms. 
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																	Above these components is a rack of common rafters. 
																	Below is a sketch of the original roof wall structural details for this building. 
															
													
									
	
		
	
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																	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. 
																	Line length is the hyptenuse of the triangle whose. 
																	The roof sheathing consisted of inch thick wide pine boards nailed to the purlins and thick enough to resist much sagging. 
															
													
									
	
		
	
																	2 heavy timber construction details. 
																	Timber frame standard details september 09 building 1 grosvenor court hipley street old woking surrey tel. 
																	There is a hierarchy of timber framing at work here with trusses supporting the ridge and purlin beams. 
																	1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches. 
															
													
									
	
		
	
																	A timber frame truss roof with ridge beam purlins and common rafters is a stunning combination that creates visual interest and structural complexity. 
																	The original roof was built using purlins beams extending between gable ends.