Building Design: Lateral Load Supporting

Systems

Buildings are classified as being tall when their height is between two and three times as great as their breadth. For example, a build­ing with a minimum dimension of 50 ft (15.2 m) in plan, and a height of 100 ft (30.5 m) or more is considered a high-rise building.

One of the major characteristics of high-rise building design is the need to resist the lateral forces due to winds, earthquakes, and any other horizontal forces. As a result special structural ele­ments must be provided to resist lateral forces and prevent or minimize the building sway. In the following sections, a brief de­scription of lateral load resisting systems, along with their corre­sponding height limitations are presented in Figure 9.1 and Table 9.1.