UNDERFLOOR VENTILATION OPENING AND STOP PIN FOR ATTACHING VENTILATION OPENING FRAME

摘要

PROBLEM TO BE SOLVED: To provide an underfloor ventilation opening and stop pins for attaching the ventilation opening frame which permit easy attaching work for ventilation opening frame without requiring the adjustment for the position of metal grille. SOLUTION: An underfloor ventilation opening 11 is provided in a foundation concrete 21 for ventilating an underfloor space of a house. For the underfloor ventilation opening 11, a metal grille 31 is installed as a ventilation opening frame to an opening formed in the foundation concrete 21 and is fixed by stop pins 32 for attaching the ventilation opening frame attachment.