Performance Evaluation of Dox Plank

The four ages of early prestressed concrete structures

“…If the extensible body is tightly tensioned (in this case by T-screws) and is then simultaneously exposed to the same tension as the inelastic body, both would be simultaneously and almost equally strongly subjected to absolute strength, and they would be broken almost simultaneously. Because a greater force is necessary to simultaneously overcome the cohesive strength of both bodies than the force required to overcome the cohesive strength of each body individually, a greater strength results from the previously mentioned… 30 Doehring was concerned that the concrete and steel would break in tension at different times because he mistakenly believed that the two materials would be able to withstand a greater force if they broke at the same time. He proposed prestressing the iron so that both materials would break at the same time.…”

“…This structural type was known in the mid-twentieth century as Dox Plank. 29,30 European prestress in the nineteenth century: Who were the real pioneers?…”