Successful designs for attach­ing curtain wall systems to steel structures start with a basic understanding of the design curtain wall system, how it frames, and how its anchorage system/loads relate to the primary struc­ture to which it is attaching. While there are many types of exterior cladding systems, this article will focus on attachment issues related to continuous aluminum curtain wall systems anchored to the building. We will also address some com­mon problem area applications, as well as how the attachments relate to the structure behind.