| 摘要 |
PROBLEM TO BE SOLVED: To provide a service entrance porch which can be constructed in a short time. SOLUTION: Against a foundation supporting a wall body of a building provided with a service entrance, a pair of arms 20 are fitted to it so as to horizontally extend under the service entrance, and a landing part 31 rectangularly framed with a joist frame 30 is horizontally supported with the respective arms 20. A floor board 40 made of concrete is horizontally fitted to the landing part 31 of the joist frame 30. The floor board 40 can be fixed only by pressing against the joist frame 30 by means of locking tools 42 fitted to the back of the floor board. |
