I still am unsure of how to have a queen post act as a truss as opposed to just transferring the load to the tie beam. Using a typical 30' x 40' (american)English barn,as an example. that are dotted all over the landscape in New england. I see that the gable end bents typically have a center support post for the tie beam with girts that tie lower on those posts to the corner posts. The interior bents seem to be able to structurally do away these interior support posts and the girts , allowing a clear span under them. In most of the house frames I see plans of that are basically, even sometimes smaller, versions of this typical English barn I describe, the queen posts are acting only to transfer the load to the tie beam. I am really unsure as to what would allow one queen post frame to allow a clear span under it and another to recquire the support under the tie beam. I am generally thinking of frames that are using principal- common rafter system( no ridge beam) and both continous top plates and purlin plates, if that has any bearing. My other thoughts are that the bottom tenon of the queen post is perhaps joined in a similar way like the king post to become a proper tension joint. Also perhaps if there were a 2nd floor load being supported on these tie beams as well. tb
