抄録
When a 33-year-old schoolhouse of a university was dismantled, a beam that had been used as a structural member was removed, and its flexural crack properties and flexural load capacity were examined. It was found that the maximum flexural crack width at the main reinforcement position before flexural load was applied had become smaller than the durability limit. On the other hand, the maximum flexural crack width at the service loading after flexural load had been applied was larger than the limit value. The flexural yield load corresponded well to the ultimate flexural strength of the standard for structural calculation of reinforced concrete structures.
