Re: (TFT) Building

["Jay Carlisle" <selfinflicted_wounds@boardermail.com>]

ncptt.nps.gov/pdf/2004-08.pdf 

> 
> 4 principal joints are used in timber framing. These will vary with 
> the situation.
> 
> A tounge and fork with a central tenon is used to to lock ajoining 
> sill plates to the corner post.
> 
> A mortise and tenon is used for setting posts into the sill.
> 
> A shoulder mortise and tenon is used to fasten the girts. The 
> shoulder joint caries the weight of the girt here.
> 
> A chase mortise and tenon is used for corner braces.
> 
> Roofs traditionally come 2 ways
> 
> Common Rafter uses 4 x 6 or larger rafters set 3 to 6 feet apart 
> with the sheathing laid perpendicular over the rafters
> 
> Principal Rafter-and-Purlins uses 6 x 6 or bigger spaced 6 to 9 
> feet apart with 4 x 4 purlins running between them. The roof 
> sheathing is then laid parallel to the rafters over the purlins.
> 


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