We herein report on our recent survey of the floors of a six-story r/c public office building to result in structural and material engineering data including its floor behavior, slab concrete properties, amounts of live loads and the degree of dimensional accuracy examined on the majority of its floor elements.' Those data are intended to be supplementary to basic reference materials still excessively undersupplied in general for further renovation of existent design and construction methods and, in particular, for improved deflection control of domestic types of r/c floor systems. In a related context, additionally we test practical utility of the deflection calculation method recently suggested in the Japanese r/c design code (i.e. Standard for Structural Calculation of R/C Structures) in comparison of current measurements of long-time floor sagging with the corresponding calculations by the above method.
