File:Notre-Dame de Paris composite transverse section.svg

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Size of this PNG preview of this SVG file: 343 × 599 pixels. Other resolution: 275 × 480 pixels.

Original file ‎(SVG file, nominally 856 × 1,494 pixels, file size: 407 KB)

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Summary

Description	English: Composite transverse section of Notre-Dame de Paris before the 2019 fire. Timber framework in red, masonry in blues, metal in grey. Left, a tower, showing internal framework of belfry (bells not shown). Center, nave, covered by masonry vault and 55-degree triangular roof (spire shown above and behind). Right, side aisles, triforium aisle above, flying buttresses. Note that the vaults thrust outwards on the walls, and the flying buttresses thrust inwards; unless these two forces balance, the wall will be pushed over. Black arrows show the force of the weight of the structure being transmitted to the ground; green arrows show the upwards force of the ground supporting the structure. Orange and grey arrows show the forces in the wood and metal of the roof trusses. Roof trusses cancel out their outwards forces using internal tension (masonry cannot support tension). Light added for clarity.
Date	18 May 2019
Source	Own work, derived as indicated under "authors"
Author	Own work, traced from public domain File:Notre Dame 531 transverse crop rot.jpg and heavily altered, mostly using the public domain architectural drawings of Eugène Viollet-le-Duc (see particularly Category:Frame of Notre-Dame de Paris). The public-domain image File:Materials and documents of architecture and sculpture - classified alphabetically (1915) (14587788087).jpg was used for the stair. Photos were also used to verify details; thanks to all Commons contributors who took unconventional shots.
Other versions	non-composite cross-section

Camera location	48° 51′ 10.8″ N, 2° 20′ 59.28″ E	View this and other nearby images on: OpenStreetMap	48.853000; 2.349800

Please note that this is not a finite element analysis, nor yet an architectural drawing; it's an infographic. That said, corrections are welcome. There are probably errors; I honestly have no good data on the space between the the vaults and the floors, for instance, and no idea if the area between the towers is even flat. I've made guesses, which I hope are sensible ones. The crypt, foundations, and staircase in the belfry framing are not shows due to lack of data. The North tower is shown with the framing of the south tower, due to a lack of an elevation of the latter. There are eight bells in the north tower, but from this perspective four bells are hiding behind the other four. I do not know which bells are larger and have not attempted to show the size range.

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This image is annotated: View the annotations at Commons