| 21. | The ouvrage consists of one entry block, two infantry blocks and three artillery blocks at an altitude of.
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| 22. | The ouvrage consists of one entry block, one infantry block and one observation block at an altitude of.
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| 23. | The ouvrage consists of one entry block, one infantry block and one artillery block at an altitude of.
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| 24. | The ouvrage consists of one entry block, three artillery blocks and one observation block two kilometers west of Modane.
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| 25. | The ouvrage consists of one entry block, one infantry artillery block and one observation block at an altitude of.
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| 26. | A two-story entry block projects from the center of the north elevation, and is flanked by porches.
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| 27. | The ouvrage consists of one entry block, one infantry block and one observation block, with an unarmed exit block.
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| 28. | The ouvrage consisted of one entry block, two artillery blocks, two infantry blocks and one observation block facing Italy.
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| 29. | After the header, the Partition Entry Array describes partitions, using a minimum size of 128 bytes for each entry block.
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| 30. | Entry blocks 8 and 9 serve the main ammunition magazine, utility area ( " usine " ) and underground barracks.
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