CEILING OPENING REINFORCEMENT STRUCTURE

To provide a ceiling opening reinforcement structure which can secure strength of a peripheral edge part of an opening, and can secure a sufficient height dimension in an upper space of the opening.SOLUTION: A ceiling opening reinforcement structure 1 for reinforcing an opening 3 formed in ceiling plates 2 includes: a plurality of ceiling joist receivers 10, 10...; a plurality of ceiling joists 11, 11... which are connected to lower sides of the ceiling joist receivers 10 and extend in a direction crossing the ceiling joists 11; the ceiling plates 2 which are fixed to lower sides of the ceiling joists 11; and reinforcement members 20 which are arranged in a peripheral edge part of the opening 3 and extend in the direction crossing the ceiling joists 11, and reinforce the opening 3. At least one of the plurality of ceiling joist receivers 10, 10... is separated at a position corresponding to the opening 3, and the reinforcement members 20 are arranged on both sides of the opening 3, and are connected to at least two ceiling joists 11, 11 connected to each of the separated ceiling joist receivers 10.SELECTED DRAWING: Figure 1 【課題】開口部の周縁部の強度を確保できるとともに、開口部の上方空間において十分な高さ寸法を確保できる天井開口部補強構造を提供する。【解決手段】天井板２に形成された開口部３を補強する天井開口部補強構造１において、複数の野縁受け１０，１０・・と、野縁受け１０の下側に連結され、野縁受け１１と交差する方向に延在する複数の野縁１１，１１・・と、野縁１１の下側に固定された天井板２と、開口部３の周縁部に配置され野縁１１と交差する方向に延在し、開口部３を補強する補強部材２０と、を備えている。複数の野縁受け１０，１０・・のうち少なくとも一本は、開口部３に対応する位置で分離されており、補強部材２０は、開口部３の両側にそれぞれ配置され、分離された野縁受け１０のそれぞれに連結された少なくとも２つの野縁１１，１１に接続されていることを特徴とする。【選択図】図１