notched flange in I Joist
notched flange in I Joist
(OP)
We have a detail on a house where we are trying to bear some
I-Joists on the bottom flange of a steel beam. In order for the joists to extend far enough to reach this point, we have to cut off the top flange for about 3 inches.
My boss says all the shear is in the lower flange, but every thing I have found says don't cut flanges on I joists with certain exceptions, and I certainly don't find any references to completely removing the top flange.
The contractor questioned it, and I know the building inspector will see it.
Has anyone ever done this?
I-Joists on the bottom flange of a steel beam. In order for the joists to extend far enough to reach this point, we have to cut off the top flange for about 3 inches.
My boss says all the shear is in the lower flange, but every thing I have found says don't cut flanges on I joists with certain exceptions, and I certainly don't find any references to completely removing the top flange.
The contractor questioned it, and I know the building inspector will see it.
Has anyone ever done this?






RE: notched flange in I Joist
BTW I have always seen joists run over the steel beam (I am assuming this is for a floor). What are you trying to accomplish by seating the joist on the bottom flange?
RE: notched flange in I Joist
However, if Iunderstand the situation correctly, this is similar to coping the top flange of a steel beam to connect to a steel beam. I strongly suspect that if this is only the last 3" or so of the joist, and if the web mateial is not cut, where the shear is that transfers to the bottom chord, then the joist will be OK. But check it out anyway.
Mike McCann
MMC Engineering
RE: notched flange in I Joist
Mike McCann
MMC Engineering
RE: notched flange in I Joist
Again...get direction from the mfr.
RE: notched flange in I Joist
RE: notched flange in I Joist
RE: notched flange in I Joist
RE: notched flange in I Joist
to the left (farther from joist end) to help with this.
RE: notched flange in I Joist
RE: notched flange in I Joist
you'll likely shatter and split the end of the I-joint if you shoot it with a powder gun.
RE: notched flange in I Joist
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RE: notched flange in I Joist
Regarding powder actuated fasteners, per my research if you select the proper length fastener you won't shatter your wood. The fastener is selected based on steel grade and thickness. It would shoot through the wood like it wasn't even there at which point it hits the steel and "embeds". If your faster embeds correctly, it just clamps your wood down.
And you don't aim it at people. Note well taken.