| 摘要 |
PURPOSE: To prevent a protruded part from settling down from a building unit of a main entrance step with a passage of time and shorten the construction period. CONSTITUTION: In a connection structure of a concrete foundation 21 fixing a unit house (building body) and a main entrance step 41 attached to the unit house, supporting beams 24, 25 holding the main entrance step 41 from the lower side are extended from the concrete foundation 21. The fitting grooves 43, 44 fitted to the supporting beams 24, 25 from the above side, are provided at the lower face side of the main entrance step 41. |
