For structural designs of more than three stories, which document must you reference?

In the context of structural designs for buildings that exceed three stories, the International Building Code (IBC) serves as the primary reference document. The IBC is specifically tailored to address safety and structural integrity in a variety of building types and heights, including those with multiple stories.

For structures that are more than three stories, the IBC provides comprehensive guidelines on various aspects of building design and construction, including requirements for structural systems, materials, load calculations, and overall safety considerations. The code ensures that the design adheres to the latest standards and practices, addressing the complexities and challenges associated with taller structures.

While the International Residential Code (IRC) is applicable to residential buildings, it is primarily intended for single-family homes and low-rise structures of three stories or less. The Uniform Building Code (UBC), which has largely been superseded by the IBC in most jurisdictions, may still be applicable in some local situations, but it does not provide the updated guidelines covered in the IBC. Local building codes may also play a role in construction practices, but when it comes to structural design for taller buildings, the IBC is the authoritative source that must be referenced.