toluun
Civil/Environmental
- Dec 3, 2012
- 6
Hello All,
I am getting a little confused by the bracing required during steel girder erection and was hoping for some clarification.
I know that during steel erection LTB can become a problem because the concrete deck has yet to be installed. I know that this restraint can be provided either by Lateral(plan) bracing at the top flange or K/X(torsional) bracing. Typically girders are erected in pairs with X-bracing preinstalled to mitigate this issue.
My question arises when there is additional diagonal lateral bracing installed in between one or more girder lines. I have included a picture below:
This bracing is usually connected to the top flange and I usually see this when large lateral forces are expected. Am I correct that this bracing is used to increase strength against lateral loads? How exactly is it adding more lateral strength?
I am getting a little confused by the bracing required during steel girder erection and was hoping for some clarification.
I know that during steel erection LTB can become a problem because the concrete deck has yet to be installed. I know that this restraint can be provided either by Lateral(plan) bracing at the top flange or K/X(torsional) bracing. Typically girders are erected in pairs with X-bracing preinstalled to mitigate this issue.
My question arises when there is additional diagonal lateral bracing installed in between one or more girder lines. I have included a picture below:
This bracing is usually connected to the top flange and I usually see this when large lateral forces are expected. Am I correct that this bracing is used to increase strength against lateral loads? How exactly is it adding more lateral strength?
