A few miles from us, Amazon is building a distribution center. They built a steel skeleton framework and are putting up the concrete tilt up panels on the lower stories. The panels are put into place and then two steel props are put into place. The props run from the ground at about a 60 degree angle up against the upper third of the panel. Then a few weeks later, the props are removed.
My question is, how are the concrete panels secured to the skeleton framework? Are they using concrete, or a grout, or an adhesive, and the props are there to fix the panel in place while the material cures? I did not see them installing any mechanical fasteners to hold the panels in place.