Addicted,
Placing too many intersecting joints at one location removes too much wood from the members and weakens the overall strength of the joint. We use the term relish. Spreading the joints out some distance apart is preferable as it leave more relish. A tongue and fork joint was the preferable joint used for the apex of principle rafters rather than a mitered connection. It gave a substantial amount of wood for each rafter to bear on so that shearing action was prevented and provided for plenty of relish.
Here I am am paring the tongue and cleaning the fork to prepare rafters for assembly.
Here is the test fit. It will later be bored pegged when finally assembled.
A collar beam will be fitted fitted to additionally support the rafters.
Finished pairs
Thrust at the eave was controlled with an anchor beams or continuous tie beam. Collar ties, purlin plates, and canted or raked struts occasionally referred to as "prick posts" were used as well to support principle rafters at intermediate points dependent on spans and loads. Most buildings were designed with posts at regular intervals. Long spans were not as important as was economy, ease of assembly and structural soundness.
Here is an example of a traditional frame design By the New England Barn Company
http://www.newenglandbarn.com/dutch-anchorbeam-barn.php using rafters and purlin plates and posts. Notice that the joints are all staggered and No two joints fall in the same location on a single member.
Here is a picture of a barn using purlin post and plate construction. notice that the common rafters are actually spliced at the plate. This was common when rafters were not available that were long enough. You may also notice a mid-span scarf joint in the plate. This was done to avoid excess joinery over the post which would cause weakness. I would rather see a continuous plate without the joint but never-the-less this is an example of a building which is over 200 years old and still sound.
Most long spans were found in storehouses or in churches and cathedrals. When the span moved past the point where a tie beam was practical, a truss was used. The Kingpost and Queenpost truss were most prevalent with Kingpost being the simplest and Queenpost the most efficient.
Here is an example of the joinery for the apex of a kingpost to rafter intersection. Notice the tenons are designed to prevent the kingpost from traveling downward by means of a wedging and ratchet effect. The kingpost does not support with upwardly, rather it pulls the rafters together with its weight and by supporting the tie beam below it. Plenty of relish is needed in the kingpost top.
Most kingpost trusses that failed, failed because of additional joinery at this point. It removed too much wood. In reality there is no need for a ridge beam here. Common rafters can be birds mouthed and pegged into purlins and plates.
Desire for longer spans and lack of longer timbers led to the development of the Hammer beam truss but this required shortened posts at the walls or some form of abutment to control the huge amounts of outward thrust they generate.
Later on the Post and Beam construction style popularized tall posts supporting longitudinal beams. Most of it omitted Mortise and Tenon joinery and used steel gusset plates and brackets which were thru bolted or they used concealed steel fasteners to make the joint strong without removing so much wood. These two distinctly different types of construction have now merged and the terms are almost used interchangeably. This has been promulgated by the use of Internet search engines to the point where just about every timberframing company uses the term post and beam interchangeably with timber frame and vice versa. It has led to some unorthodox structural arrangements which require a lot of unnecessary engineering and confusion as to what supports what and how it is connected together. I predict it will cause problems in the future when people try to add, modify or maintain a structure as this is when it becomes important to understand what supports what, what is load bearing and what is not etc.
One rule of timberframing is to try and use the simplest joint possible to do the job well. If you can avoid complex intersections you will serve yourself well not only in longevity and structural soundness but in effort, assembly and less waste.
That said, with enough money, effort, and time, anything you want to see can be accomplished.
What you are doing with a supported ridge beam can be done and is not wrong, it just makes life more difficult than it need be and I would avoid it unless you have a particular reason for doing it, which you may have that I am not aware of.
Hope this helps more than it confuses. Keep asking questions. We all learn together, here amongst friends.
