Medieval Techniques Used to Rebuild Notre Dame Roof

Medieval carpentry techniques are being used to rebuild Notre Dame Cathedral's fire-ravaged roof.
Modern-day carpenters are using hand axes to fashion hundreds of tons of oak beams for the framework of the new roof.
The use of hand tools is a deliberate choice to pay tribute to the craftsmanship of the cathedral's original builders and to ensure that the centuries-old art of hand-fashioning wood lives on.
Computer design and other modern technologies are also being used to speed up the reconstruction.
The rebuilt frame is the same wooden frame structure of the 13th century, made of oak and using the same tools and know-how.