JOINT STRUCTURE OF LIGHT FIREPROOF PARTITION WALL AND CONSTRUCTION METHOD THEREOF

PROBLEM TO BE SOLVED: To easily form a hiding joint part on a wall surface of a light fireproof partition wall without any additional establishment of a surface material and without using a specific fireproof joint material, fireproof joiner, etc.SOLUTION: A hiding joint part 31 is formed in a manner that an under material 5 is fixed on an interposed column 4 in a form of lying in a lateral direction, a coat material 6 is fixed on a room side of the under material in a form of lying in a longitudinal direction, and side surfaces 62 of adjacent coat materials are separated from each other. A projecting joint part 22 of the under material located on a bottom 33 of the hiding joint part is sealed in an airtight manner with a seal material over a joint part width W, and then a belt-shape material 10 of a noninflammable fiber material having permeability is placed on the bottom of the hiding joint part so as to conceal the bottom from an indoor space R with the belt-shape material.SELECTED DRAWING: Figure 1 【課題】面材を付加的に施工せず、しかも、特殊な耐火目地材、耐火ジョイナー等を使用することもなく、軽量耐火間仕切壁の壁面に目透し目地を簡易に形成する。【解決手段】下張り面材5を横張り形態に間柱4に固定し、下張り面材の室内側に上張り面材6を縦張り形態に固定し、隣接する上張り面材の側面62を相互離間して目透し目地31を形成する。目透し目地の目地底33に位置する下張り面材の突付け目地22を目地幅Wに亘ってシール材で気密処理した後、通気性を有する不燃繊維材料の帯状材10を目透し目地の目地底に敷設し、目地底を帯状材によって室内空間Rから隠蔽する。【選択図】図１