The last factor to consider is the type or form of stairs. There are three forms of wooden stairs, the stairs are in the notch, overlapping the stairs, and stair-crossed. The stairs are in the notch, including the oldest types of stairs, once these steps are used in residences of traditional stage that can reach 2 meters high with a fairly steep slope about 60 degrees. The stairs are fairly placed on the hard ground surface and the top edge of the floor beams are connected to the houses on stilts.
Rung overlapping widely used as the main staircase as it saves space requirements and form connections staircase construction adds aesthetic value to the space. This type of stairs that slope is about 24 degrees to 45 degrees has a characteristic partially hidden under the stair steps above it. This type of overlapping ladder can open on the inside (between the stairs was not closed) or it could be closed (covered with wooden boards). It is advisable to use a closed overlapping between the steps, stairs and board lid mothers can work together to distribute the load it receives to be forwarded to the foundation.
Crossed ladder used on a very narrow space with a slope of stairs about 60 degrees, so that when climbed need vigilance and caution. In addition to fairly steep slope, the shape of its construction makes people uncomfortable, because the stair footing almost all of them hidden under the stairs foothold on it, crossed Stairs not suitable for use as the main staircase