PROBLEM TO BE SOLVED: To solve such problems that a conventional continuous footing of an entrance section allows the formation of a clearance between the base of an earthen floor and a lower frame of an entrance door or a sill receptacle or the like during the attachment of the entrance door because of the plane shape of the top surface of a notch opening, that time and manpower are required for filling mortar into the clearance, that the lower frame or the vertical frame of the entrance door sometimes cannot be installed unless part of the continuous footing orthogonal to the notch opening is notched when the section in which the entrance door is provided is a reentrant angle or an outside angle, that time and manpower are required for cutting off a part of the continuous footing, and that it has a dirty appearance and requires a great deal of time for modification.;SOLUTION: The frame provided to the frame of the continuous footing can keep the top end of the continuous footing of the entrance section low and can mold a step height of which the outside is lower. An opening used for pouring concrete is provided on the inner bottom plate, and a sloping-surface plate is provided between the top of the side plate on the outer bottom plate side and the opening. A slide part is provided on at least one of the both sides, and the slide part is engaged in the continuous footing orthogonal to the continuous footing of the entrance section.;COPYRIGHT: (C)2010,JPO&INPIT
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