END WALL ROOF BEAM TWISTING DUE TO LONGITUNAL FORCES

[shnider22]

Hi gentlemen;
the end wall posts are connected to the bottom flange of the the end wall roof beam.so when the wind force applied to the end wall posts an transferred to the roof beam what prevent the endwall roof beam from turning or twisting.(because purins are at the top flange)

 

[dreber]

A sketch/free body diagram could help me understand the question.

 

[KootK]

I'd think that you'd want some blocking in the plenum space behind the posts to drag the post loads into the diaphragm. It ought not be a difficulty unless it's exposed framing and would be aesthetically disruptive.

 

[MIStructE_IRE]

I would do an inclined angle section strut which transfers the load back to the purlin. Almost like one half of a torsional V restraint.

Although ideally the end bay frame would have columns to top of purlin, with tie beams both directions connected to the wind girder.