Great example Kevin, this helps expose some of the issues created by using current antiquated methods of determining roof geometry.
First, the form asks you to measure the “total roof system perimeter” AND “non-hip features”. But, the form never tells you what exactly is a “non-hip” feature.
The short story is, a non-hip feature is any portion of a roof structure that is not reinforced or constructed properly, it can also mean a damaged or failing roof structure. That’s the short definition. To assume anything else implies that the roof structure could not benefit in any way from reinforcing but only “reshaping”….and that simply isn’t true for any roof structure.
A few questions: Where is the home built (county/municipality)? What year was it built? Are the perimeter walls framed of the roof structure (trusses) or are they balloon framing? Has the home been retrofitted at the roof to wall connections? What are the current roof to wall connections? Are they framed walls above the main roof structure that have load path connections in place? Has the roof covering been replaced with an PA/NOA roof covering? How was the roof deck secured?
The reason I ask these questions is directly related to the way an insurer will assess these features combined. In other words, a hip roof geometry may not receive a “full credit” by an insurer if the other features have not been updated. I have done some consulting in the past and this is how the modeling software works. A home will receive a “percentage” of a hip roof geometry if the other features have not been updated (roof covering, roof deck, roof to wall connections).
In order to answer your question, I’ll need more information about the structure.