Definition of a Roof Diaphragm vs Wall
Definition of a Roof Diaphragm vs Wall
(OP)
Hello,
I have a building with a very steep roof. It makes an angle of approximately 79 degrees to horizontal. We are using braced frames and I am looking for some definition about walls vs roof diaphragms so we can figure out the required extents of our frames. Anybody have any information on this? Severely sloping roof diaphragms?
Thanks,
SGS
I have a building with a very steep roof. It makes an angle of approximately 79 degrees to horizontal. We are using braced frames and I am looking for some definition about walls vs roof diaphragms so we can figure out the required extents of our frames. Anybody have any information on this? Severely sloping roof diaphragms?
Thanks,
SGS






RE: Definition of a Roof Diaphragm vs Wall
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: Definition of a Roof Diaphragm vs Wall
RE: Definition of a Roof Diaphragm vs Wall
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: Definition of a Roof Diaphragm vs Wall
Connections aside, it is screaming "WALL" to me.
Mike McCann, PE, SE (WA)
RE: Definition of a Roof Diaphragm vs Wall
RE: Definition of a Roof Diaphragm vs Wall
RE: Definition of a Roof Diaphragm vs Wall
RE: Definition of a Roof Diaphragm vs Wall
Liability.
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: Definition of a Roof Diaphragm vs Wall
SGS
RE: Definition of a Roof Diaphragm vs Wall
Mike McCann, PE, SE (WA)
RE: Definition of a Roof Diaphragm vs Wall
RE: Definition of a Roof Diaphragm vs Wall
I've never seen anything in code that addressed this particular situation. An interesting feature of the design will be bracing the point where your two stacked BRB's meet and there is the angular change. Monster out of plane load.
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: Definition of a Roof Diaphragm vs Wall
Mike McCann, PE, SE (WA)
RE: Definition of a Roof Diaphragm vs Wall
There is no diaphragm at the interface to take the OOP loading. So yea, those loads will be quite high and we will have to figure out a way to deal with that.
SGS
RE: Definition of a Roof Diaphragm vs Wall