Blocking between joists seats
Blocking between joists seats
(OP)
I am concerned about roll-over of joists seats on a project (40LHs, spanning 68', with horz shear = 780# joist seat). I found this thread to be useful.
http://www.eng-tips.com/viewthread.cfm?qid=301328
So I have decided to place HSS blocking between the seats but I was wondering if I can run this detail by folks here to see if it makes sense. I am using a 5" high HSS to match the joist seat and then asking it be simply tack welded to the seat.
http://www.eng-tips.com/viewthread.cfm?qid=301328
So I have decided to place HSS blocking between the seats but I was wondering if I can run this detail by folks here to see if it makes sense. I am using a 5" high HSS to match the joist seat and then asking it be simply tack welded to the seat.






RE: Blocking between joists seats
RE: Blocking between joists seats
RE: Blocking between joists seats
I was just thinking about that actually. I can always ask for another embed plate from the precaster and save the cost of steel and welding.
RE: Blocking between joists seats
I have done that in the past but they always comeback with a comment that there is going to be x" lateral movement at the top of the joist and want me to approve that, which I have never felt comfortable with.
RE: Blocking between joists seats
WWTEng, you must be a young/inexperienced engineer in an office where you have no support from other engineers. Your frequent, recent posts tell me this... unless you don't want to ask because you're afraid you'll look stupid. If there is somebody in your office you can bounce this stuff off of, that would be your best choice. The only stupid people are those that won't ask.
RE: Blocking between joists seats
RE: Blocking between joists seats
RE: Blocking between joists seats
RE: Blocking between joists seats
the precaster has no problem proving a 6x6 (@4' oc) plate at this location if I ask for it. But why would you prefer a bolted connection rather then a welded connection? Also, I was thinking that I would only weld the angle to the embed and not to the joist, to allow for any thermal movement of the deck.
DHKpeWI:
Thanks a lot for the info. Is it possible for you to post that info here!
RE: Blocking between joists seats
RE: Blocking between joists seats
See attachment.
RE: Blocking between joists seats
I think you are visualizing a problem here that does not exist.
Mike McCann
MMC Engineering