In order to reduce the weight of buildings, the lightweight sandwich slab system consisting of an ALC (autoclaved lightweight aerated concrete) core adhesively bonded with steel skins was proposed. In this paper, two hour fire resistance tests under constant dead loading have been performed. Subsequently, structural behaviors on the four-point bending tests against these specimens subjected fire heating are studied. Each test results reveal that the steel/ALC sandwich slabs have fireproof qualities with almost the same level as ordinary ALC panel.
