Not exactly sure what a posted ridge is, but Carlos picture shows a kingpost with split tie beam. The very bottom of the king has a pendant (not a post) which is just out of range of the picture shot. I was there when he took the pic. The kingpost truss spans the width of the library. What you also see in the pic is a small partial perimeter loft framed by a couple floor joists. The center of the building is left open to the ceiling.
Steve showed us how this was possible so that you didn't need really long tie beam timbers. Of course you always have to work out all the loading and stresses, like on any design to be sure it is strong enough with enough margin of safety.