DRAINAGE STRUCTURE OF THROATING MEMBER

PROBLEM TO BE SOLVED: To provide a drainage structure of a throating member, capable of preventing water from entering the inside of a building due to back-flow of water from drain hole parts, although the drain hole part for discharging water entering the backside of the throating member is provided.SOLUTION: An outer wall part 17 is provided in the periphery of a balcony 20 provided in a building. An outer wall face material 28 and a wall lower waterproof layer 44 extending from a lower part of the back surface of the outer wall face material to a floor surface of the balcony 20 are provided in the outer wall part 17. A throating member 40 having a throating plate part 40a is provided below the outer wall face material 28 in a state that the throating plate part 40a faces the wall lower waterproof layer 44 with a space therebetween, and a throating back space 48 is formed between the throating plate part 40a and the wall lower waterproof layer 44. A throating body 41 of the throating member 40 has horizontal plate parts 41c, 41b extending from vertical plate parts 41d, 41e on the back surfaces thereof to the wall lower waterproof layer 44 and partitioning the throating back space 48 vertically. A plurality of drain hole parts 51, 52 penetrating in the thickness direction of the horizontal plate parts are formed in the horizontal plate parts 41b, 41c, respectively.