| 摘要 |
PROBLEM TO BE SOLVED: To provide a service entrance porch which can be easily constructed and assembled while solving ageing defectiveness. SOLUTION: This service entrance porch 1 provided at an outdoor side rising face of a building foundation B is formed by installing sills 2 of approximately U-shaped cross section with the opening side placed at the topside below a service entrance A, detachably fitting both ends of first fasteners 4 to two side plates 3 so as to straddle the opening of each sill 2, placing a floor board 5 on the first fasteners 4, and connecting and fixing second fasteners 7 provided at the floor board 5, to the first fasteners 4 by fixtures 21.
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