Northern Fortress - Southern Forts

Vaulted test casemate

Vaulted test casemate - Southern Forts, Fort Rif next photo - 71 kb

A variety of concrete structures were tested at the fort. In the picture the dungeon with a semicircular arch is shown. Concrete design of armored shutters, doors, window frames, etc. were tested also. So the optimum thickness of the armor-closings were based in 19 mm. Oval hatches are connected the room with the auxiliary gallery.

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