Did67 wrote:The framework of Notre-Dame is perfectly documented in the Historic Monuments.
If it is perfectly documented we should know if the arrow was oak or pine already. Ditto for the batten on which the lead cover was fixed. Viollet le Duc was well aware of the problem of the chemical reaction between oak and lead and he would have coated the oak batten with a layer of minium, unless he had used ... pine batten. "Techniques of ancient architecture" by Yves-Marie Froidevaux ( https://fr.wikipedia.org/wiki/Yves-Marie_Froidevaux ).
Anyway, the battens burned very well ...
In addition to the batten, there was "kindling" under the cover, was the floor of the aisles oak or fir? In recent photos, the guardrails are apparently made of fir rafters, some of them are new ... And was there a stock of rafters somewhere?
source: http://www.notredamedeparis.fr
Here is a photo taken by Le Républicain Lorrain during the recent restoration of the Metz cathedral. We see bastaings in fir used on the site (a priori, it is not prohibited):
But, well ... See you in June for the descent of the rooster :