Abstract
In this study, the work focuses on drywall and gathers the basic knowledge of designing the fire resistance method which was considerate about building structural and fire force. In case of fire, the drywall crack, then the hot air flow into the hollow layer. This movement makes the temperature of dry wall increase in the early, Therefore, this study takes calcium board and gypsum board to work on a small-scale heating experiment of thermal contraction. The part 5 shows the experiment results.