It developed hybrid stairs which composed steel frame and pre-cast concrete members. These stair system does not need the concrete placing in the building site because all members of stair are manufactured in the factory previously. In this report, the outline of the stair system and the execution method of this stair are described first. Next, the results of vertical and horizontal loading test are described. From these loading tests results it is clear that this stair system have enough rigidity and strength for vertical and horizontal direction.
