Joining structure between refractory structural beam and concrete slab, and joining method between refractory structural beam and concrete slab

摘要

PROBLEM TO BE SOLVED: To provide an easy-to-construct joining structure between a fire resistant construction material beam and a concrete slab.SOLUTION: A joining structure between a fire resistant construction material beam and a concrete slab comprises: a fire resistant construction material beam made of a fire resistant construction material having a load support layer which is manufactured by layering a plurality of wooden plate materials and integrating the same with a binding material and provided with an open top concave section concaved on an interface of one of the wooden plate materials next to each other in a direction away from the interface of the other wooden plate, a fire resistant layer arranged on both side faces and a bottom face of the load support layer, and a burning allowance layer arranged on both side faces and the bottom face of the fire resistant layers; a joining member which has a steel plate, fitted into the concave section, provided with an upwardly protruded protrusion section and a metallic rod member installed at the protrusion section of the steel plate and protruded in a direction intersecting a surface of the steel plate; and a concrete slab with the protrusion section and the rod member embedded therein. Upper surfaces of the load support layer, the fire resistant layer and the burning allowance layer are covered by the concrete slab.SELECTED DRAWING: Figure 4