This has nothing to do with historic hewing, but here are some shots of the rigging at a TFG raising--the Farm and Wilderness barn in VT. Three walls were raised from 2 ginpoles, guylines went to massive concrete blocks. Different sections of the camp raised the individual walls throughout one day. Roof framing was helped along by hydraulics.

You can sorta see the homemade pivot on the bottom of the poles, I believe it's part of the Guild's toolkit.

The smallest kids at the camp raised the center wall which was pretty cool to see:

And this is how the ginpoles went away...