本研究藉由十二次的全尺寸鋼筋混凝土建築物火災實驗，使用火載量50kg/m2，並配合以四種垂版深度(0、30、60、90 cm)、搭配三種開口部寬度之變化(265、185、105 cm)，及固定的開口部高度(112 cm )，探討防火建築物發生居室火災時，由開口部噴出之火焰行為(居室外)及居室火災行為(居室內)。

本研究試驗類型全都屬於通風控制型燃燒，依實驗結果顯示，當開口部面積不變時，垂版深度之變化量，影響居室內之溫度及燃燒速率並不明顯，影響較大的是噴出外牆開口部之火焰高度，隨著垂版深度之增加，噴出火焰之高度亦隨著降低，平均增加90公分之垂版深度，會降低噴出火焰高度約60公分，因此增加垂版深度對於抑制噴出火焰高度，改善上部空間之危險性是有幫助的。

The research All the 12 experiments were conducted to study the compartment fire behaviors in a full-scale reinforced concrete building. The fire load comprised wood cribs giving a total fire load density of 50kg/m2 and each test were made in the same compartment under a window opening condition with varying spandrel-depth and window opening width. The burning behaviors of the test models were analyzed by measuring the temperature and issuing flame height. All burning types of the research are for Ventilation controlled. According to experiment results, when opening factor is the same, the change of spandrel-depth has smaller influence of the compartment temperature and burning rate. On the contrast, the issuing flame height has great influence. The experimental results indicate that by increasing the spandrel-depth, the issing flame height is reducing. In average, increasing 90cm spandrel-depth would reduce 60cm issuing flame height. Therefore, increasing spandrel-depth is effective to some extent in preventing the exposure fire at the opening from damaging the upper space.

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