12:12 Pitch Roof Diaphragm Question
12:12 Pitch Roof Diaphragm Question
(OP)
If you have a 12:12 pitch roof the two sides of the roof diaphragm are 90 degrees to each other, similar high pitched roofs are close to 90 degrees. How can you consider two diaphragms that are 90 degrees to each other a continuous roof diaphragm? Does this change anyone's analysis of this type of roof?
Usually when I have a high pitched roof I'm dealing with attic trusses and hence an attic floor diaphragm which can partially transfer the shear loads in conjunction with the roof diaphragm. However, there are times where I'm dealing with an actual vaulted (ridge beam) roof and the roof diaphragm is really two planes at an almost 90 degree angle to each other.
Usually when I have a high pitched roof I'm dealing with attic trusses and hence an attic floor diaphragm which can partially transfer the shear loads in conjunction with the roof diaphragm. However, there are times where I'm dealing with an actual vaulted (ridge beam) roof and the roof diaphragm is really two planes at an almost 90 degree angle to each other.
A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com






RE: 12:12 Pitch Roof Diaphragm Question
DaveAtkins
RE: 12:12 Pitch Roof Diaphragm Question
RE: 12:12 Pitch Roof Diaphragm Question
A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com
RE: 12:12 Pitch Roof Diaphragm Question
The other thought that comes to mind is utilizing a load path similar to pre-engineered buildings with wall girts. If you can create lateral resisting lines close enough together, maybe you can abandon the simple diaphragm model for these high pitched roofs.
"It is imperative Cunth doesn't get his hands on those codes."
RE: 12:12 Pitch Roof Diaphragm Question
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: 12:12 Pitch Roof Diaphragm Question
Maybe a good master's thesis topic for the poster asking for ideas this week??
RE: 12:12 Pitch Roof Diaphragm Question
A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com
RE: 12:12 Pitch Roof Diaphragm Question
RE: 12:12 Pitch Roof Diaphragm Question