Fireproof coated structure for penetration part

Abstract

A fireproof covered structure for covering a penetration part (11) formed in a fireproof beam (20) of a wooden building to make the penetration part (11) fireproof, wherein a tubular fireproof covering material (12) is attached to the penetration part (11) while covering an inner peripheral surface of the penetration part (11). The tubular fireproof covering material (12) is formed by stacking a plurality of gypsum board pieces (13a) cut out from commercially available gypsum board (13) of thicknesses of 9.5 mm to 25.5 mm, in the thickness direction and unitarily connecting the gypsum board pieces (13a). The tubular fireproof covering material (12) is inserted into and attached to the penetration part (11) such that a connecting portion (15) that connects gypsum board pieces (13a) that are adjacent in the stacking direction is disposed at a boundary portion (23) between a structural member (21) and a covering member (22) of the fireproof beam (20), or at portion close to the boundary portion (23).