Steel joist bridging through masonry walls

[PG35]

When joists are parallel to masonry partitions should the bridging start and stop at the wall? Can it punch throught the wall and be grouted in place? what are the adverse effects of this? would a clip angle detail at the wall allowing vert. deflection be required? If less than 3/4" of max. vert. deflection in the joists would be anticipated, would there be much of a point in allowing for the deflection?

Can anyone comment on this.
Thanks,
PG

 

[DaveAtkins]

I assume the masonry partition will be built after the roof is in place. Can't you just leave a gap around the bridging? If this is a fire barrier, then there are products available for filling in the gap to prevent the spread of smoke.

DaveAtkins

 

[jike]

I really think there is alot of flexibility in horizontal bridging and wouldn't worry to much about deflection. One caution is to NOT use x-bridging (use horizontal bridging) between a joist and masonry wall. The x bridging connection will be pulled out of the wall due to deflection of the joist.

 

[JAE]

I agree with jike - no X bridging TO the masonry wall.

But you can use horizontal bridging throughout the joists and then use X bridging in the second joist space from the wall and NO briding on the wall-side of the last joist.

OR - you can use horizontal briding throughout and simply run the briding horizontally into the wall and attached with a small clip angle and sleeve anchor. This is what you usually see. I've never seen bridging run through a wall unless the wall was constructed after the joists were all up. And even then I would think that the bridging would be terminated at the wall face.

 

[MarcbSE]

I agree with jike and JAE:

Use a clip angle attached to the masonry with sleeve anchors and attach the bridging to the clip angle.

 

[msquared48]

I agree too. Another reason not to go through the CMU, or concrete wall, for that matter, is a lot of these walls are fire walls. Any penetration grouted or not, could affect the fire rating of the wall. Stop it at the wall.

Mike McCann
McCann Engineering