Please see the attached article, Tech's Corner: Solid Shafts & Spring Turns. This article covers three common questions for the residential doors that are typical with commercial applications.
Spring turns over 8' tall are covered in the extended height supplement. The spring turns are located on the spring tags and on the small hardware box of the order. This article covers most common sizes and turns without checking configuration reports within the factory.
Solid shaft and auxiliary support brackets are also covered, along with their uses and how to install.