Among the Fire Protection in the interior representative case are spray coat, board, Paint. Intumescent paint has been developed that price competitiveness manufactures and Fire-resistances certificate was verified by experiment. Recent three-hour fire resistance performance developed Intumescent paint is applied as a high-rise, and major structures designed according to the refractory needs to be more efficient. However, domestic and outside the thermal properties of Intumescent paint materials are not proposed. Meanwhile, Intumescent paint in fire is built char layer since the 500∼60 0℃ and middle layer is formed by the decuple intumescent char more then cover thickness at room temperature. It is cut temperature flow off to the steel surface. Nonetheless, Bond Strength of steel and paint deprive as the intumescent char increases. and then steel surface are exposed to flame instantaneously. In this study, intumescent char estimate according to structural parameter(Fire resistance, cover thickness, shape ratio).

ABSTRACT
 1. 허용 및 한계온도 경향
 2. 내화실험 개요 및 방법
 3. 두께에 따른 표면온도분포
 4. 기둥 축 변형-가열시간 관계
 References

• 김선희(서울시립대학교 건축공학과) | Kim Sun-Hee
• 염경수((주)액트파트너) | Yom Kyong-Soo
• 최성모(서울시립대학교 건축학과) | Choi Sung-Mo