When designing large roof deck diaphragms, the shear requirements at the perimeter often far exceed those in the field, so much so that the more commonly used lighter gage decks and typical attachment designs can be inadequate. What is the best way to increase the deck diaphragm shear strength while also minimizing any cost increases? 

In June 2018, Keith Cullum, PE, from Simpson Strong-Tie gave a presentation on Steel Deck Diaphragm Attachment. Keith reviewed the function and components of a steel deck diaphragm and compared common attachment methods. He also talked about appropriate standards and building code references and frequent challenges associated with designing steel deck diaphragms. At the end of the session, a question was asked about the best approach to increasing the deck diaphragm shear capacity in the most cost-effective manner...  watch a short video to hear Keith explain his step-wise strategy to increasing shear capacities and read the full article on our SE University blog.