There are a number of discussions related to the exterior facades and fire protection. The building codes have, for some time, required that the gap, between the concrete floor and the exterior facade of a building, be filled with something that can prevent the movement of smoke and fire to the upper floors. There is even a test standard developed specific to the unique dynamics of this particular application.
This is the first of a two part challenge to the industry to make something better then what currently exists. If you have any questions about an installation on a project you are on, contact me and I will help you figure out if there are any concerns.