Floor beam connection structure and construction method for floor beam connection structure

Abstract

To provide a floor beam connection structure that can enhance the fire resistance of beam materials. [Solution] The floor beam connection structure 10 comprises a floor material 11 having thermal conductivity, a beam material 12 having flammability that supports the floor material 11, and a connecting part 13 that connects the floor material 11 and the beam material 12. The beam material 12 has its sides covered with fire-resistant material 14s and its bottom surface covered with fire-resistant material 14b. The connecting part 13 is provided so as to be in contact with the floor material 11 and the upper end of the fire-resistant material 14s and has a heat conduction reducing member 18 that reduces heat conduction from the floor material 11 to the beam material 12.

Claims

1. A floor beam connection structure comprising a floor material having thermal conductivity, a combustible beam material supporting the floor material, and a connecting portion connecting the floor material and the beam material, The aforementioned flooring material is a cement composition, The beam material is covered on its sides and bottom with fire-resistant material. The aforementioned connection part is A heat conduction reducing member is provided so as to be in contact with the floor material and the upper end of the fire-resistant material, and reduces heat conduction from the floor material to the beam material in the event of a fire on the underside of the floor material, and the heat conduction reducing member is a non-structural material made of a water-resistant non-combustible material, It has a support portion that is integrally formed with the floor material and supported by the beam material, The support portion is formed in a rectangular cross-section that protrudes downward from the lower surface of the floor material and extends in the direction of the beam material. The heat conduction reducing members are provided in pairs on both sides of the supported portion, straddling the supported portion, extending inward from the upper end of the fire-resistant material toward the supported portion along the floor material, and are provided so as to be sandwiched between the lower surface of the floor material and the upper surface of the beam material. Floor beam connection structure.

2. The heat conduction reducing member is a gypsum board. The floor beam connection structure according to claim 1.

3. The heat conduction reducing member is a calcium silicate board. The floor beam connection structure according to claim 1.

4. A method for constructing a floor beam connection structure having a floor material having thermal conductivity and a combustible beam material supporting the floor material, The flooring material has a support portion that is formed in a rectangular cross-section and protrudes downward from the lower surface of the flooring material, extends in the direction of extension of the beam, and is supported by the beam. The process of installing the beam material, whose sides and bottom surfaces are covered with fire-resistant material, A step of attaching a heat conduction reducing member, which reduces heat conduction from the floor material to the beam material in the event of a fire on the underside of the floor material, so as to contact the upper end of the fire-resistant material that covers the upper surface and the side of the beam material, A step of setting up formwork so that the lower surface of the flooring material and the upper surface of the fire-resistant material are flush, A step of pouring a cement composition to form the floor material, The process includes removing the aforementioned formwork, The heat conduction reducing member is a non-structural material made of a water-resistant, non-combustible material, and a pair of them are provided on both sides of the support portion which is integrally formed with the floor material by the pouring of the cement composition, and are attached so as to extend inward from the upper end of the fire-resistant material toward the support portion along the floor material, and to be sandwiched between the lower surface of the floor material and the upper surface of the beam material. Construction method for floor beam connection structure.

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