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Notre Dame Cathedral will never be the same, but it can be rebuilt

Added 04-15-19 10:10:02pm EST - “A wealth of digital data can help.” - Arstechnica.com


Posted By TheNewsCommenter: From Arstechnica.com: “Notre Dame Cathedral will never be the same, but it can be rebuilt”. Below is an excerpt from the article.

After a long night of work by over 400 Paris firefighters, the fire at Notre Dame Cathedral is beginning to cool as of 7:00pm Eastern Time (1:00am in Paris). We're still not sure about the extent of the damage, but as Paris and the rest of the world watch the fire slowly dying, attention starts to shift to what can be salvaged and rebuilt. And art historians and architects have incredible records of the cathedral, which has been damaged, rebuilt, nearly abandoned, and renovated many times throughout its long history.

Notre Dame's roof and its support structure of 800-year-old oak timbers had almost completely succumbed to the flames. Firefighters reported the cathedral's bell towers safe and said that many works of art had been rescued or were already stored in areas believed safe from the fire. The main spire—750 tons of oak lined with lead—collapsed in flames around 2pm ET, landing on the wooden roof.

The trees that made up the roof's wooden structure were cut down around 1160, and some sources estimate that the beams accounted for 13,000 trees, or about 21 hectares of Medieval forest, many of which had been growing since the 800s or 900s. "You have a stage in France where deforestation was a problem; these buildings consumed huge amounts of wood." That's according to Columbia University art historian Stephen Murray, who spoke with Ars Technica. All that wood, he said, supported an outer roof of lead—until the wood burned and the roof collapsed.

"The entire roof is destroyed; I hope the vaults can resist," reads an email from one of Murray's colleagues in Paris, which he was kind enough to share with Ars Technica. The high vaulted stone ceilings give the cathedral an open, cavernous feel and perfect acoustics for religious services, but they were also built to help protect the interior of the cathedral from an event exactly like this one: the collapse of a burning roof.

"The vaults are intended to fireproof the interior of the building," Murray said. "We don't know yet, as far as I know, whether that has been effective. The weight of that steeple falling on top of the vault may have punctured the vaults."


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