Type V Structure (Tube-in-Tube Systems)

This system is a combination of the framed-shear wall (type III structure) which acts as an interior tube, and the framed tube (type IV structure), which acts as an exterior tube. The floor structure ties the interior and exterior tubes together to allow them to act as a unit to resist lateral loads.

Table 9.1 indicates the optimum height of each lateral support system. It should be noted that Table 9.1 serves only as a rough guide for determining the suitable lateral supporting system for each building height. Judgment, experience, and the personal pref­
erence of the designer are all important factors in choosing the proper lateral support system.