Abstract
The purpose of this research was to gain data on the maintenance of buildings in order to determine suitable periods for repair. I surveyed 100 telegraph and telephone office buildings, selected from all districts in Japan, to compare different conditions of age, region, climate and size. The survey was about 130 items in every part of the buildings, such as roofs, exterior walls, paint surfaces window and door fittings, interior walls, ceilings, floor and others. The problem of past surveys is that they have not provided sufficient information on building wear, but the accumulation of the surveys will provide better rules for building maintenance.
