Just a comment

The long plates were raised vertically in a horizontal position up the vertical end posts using ropes over the tops of the posts, and man power underneath. Men with pike poles would push and lift, and other men on the ropes would hold. near the top the plate would be rested on round pins driven into predrilled 2' holes. Many men then would be assembled on tempoaray scaffolding to lift the plate straight up and then let down over the tenons, fitting in the braces in the process.

NH