The first provision, Section 510.2, allows an upper structure of any construction type to be built over a lower podium where the two structures are treated as separate and distinct structures. There are three sections in IBC 2015 Chapter Five pertaining to podium designs that describe permissible building heights and story limits and are critical to understand when designing cold-formed steel upper structures over a concrete podium to maximize the benefits of non-combustible steel construction.
Cold formed steel framing nexted tracks code#
The International Building Code (IBC) requires the upper and lower structures to be separated for fire and other safety reasons.
Cold-formed steel provides an ideal solution for all of these design challenges. Building height limits also affect building material selection, the treatment of fire safety, sound considerations, architectural unit space planning, and egress. Combining non-combustible materials such as cold-formed steel with concrete and hot-rolled steel results in higher building heights for these structures at an economical price. With this increased density comes the need to provide a safe, non-combustible framing system that is also strong to achieve the desired overall building height. This upper structure lends itself well to individually framed walls and floor systems. The base structure is generally used for parking or retail space, with an upper structure that is of another use, such as apartments, dorms, senior living, hotels or other private spaces. The most common scenario is a base structure, commonly referred to as the podium. Building designers are often challenged with an increasing demand for high-density, combined-use buildings in urban locations.
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