Hi Bruce,

I agree with Mo that those centre posts are currently a bit "unconnected" and so the addition of bracing across and along the building would help to fix this post in 2 planes, however, when a transverse or longitudinal wind load is applied to the frame the braces would tend to lever up the plate and currently other than gravity nothing else is holding down the tie beam. You might well now realise that the main purpose of the teazle tenon on a Gunstock post is to "close the triangle" and hold the tie down tight onto the wall plate allowing the braces to do their work.

As things stand this whole frame is very vulnerable to collapse and therefore its survival will depend very much on the additional measures that you will be taking to help improve its stability.

Regards

Ken Hume