Roof Truss Design 2

[alaguengg]

Dear All,

I am designing a roof truss 16m span, a howe truss for a pre engineered building. (Attached Model image) In seismic analysis, I am getting a minor axis moment which is governing my top and bottom chord design. I already braced the budling. Kindly enlighten me to get rid of these minor axis moments.

Thanks
AR

 

[XR250]

Bottom chord bracing are to brace the bottom chord purlins. Is there any other way to restrain the bottom chord movement during a lateral load?. Please advise.

How are you bracing your endwalls? If you are using the bottom chords purlins, that needs to be accounted for in your analysis.
The bracing layout you have seems logical.

 

[FSS]

Is this a student project or real-world project? If the latter, then what kind of comments are you getting back from the engineer who will be reviewing/sealing the drawings? It will be his/her project after all.