A king post truss is one of the most common types of trusses and is a very strong one, since the bottom chord prevents spreading. This example is a Haunched King Post. The top chords have stub tenons (tenons that extend all the way across the face of the timber) and the sides of the king post are beveled to create a shoulder for the top chords to rest upon. That creates an attractive assembly.
In order to avoid having to cut too much wood away from the king post, this example uses steel All Thread rods to tie everything together. This allows faster cutting, fit up and assembly. The all thread is inserted into notches cut into the top chords and through a hole bored into the king post. Since this occurs at the top of the timbers, the metal is not visible and the entire assembly appears perfectly traditional. The ridge beam is set into a shoulder cut into the king post, and secured with hidden structural screws.
Using hidden metal connectors in this fashion has become more and more common. It is a great way to strengthen the frame without sacrificing the beauty of traditional joinery.