Beam Erection Seat
Beam Erection Seat
(OP)
I have a wide flange beam that attaches to a column with a single shear plate bolted connection designed for bearing (not slip critical). The contractor wants to use an erection seat angle welded to the column and left in place after construction. It seems to me that the erection seat will prevent the bolts from engaging the load from the beam. I couldn't find anything in the AISC code or ENG-TIPS forums about this situation.






RE: Beam Erection Seat
I think you are worrying too much. See it as positive thin and some sort or redundancy. I would not rely on the seat angle to support the beam end unless proper engineering is done on the seal angle and its connection to the column.
You can ask the contractor to remove the seat especially if it is exposed.
RE: Beam Erection Seat
RE: Beam Erection Seat
Hg
RE: Beam Erection Seat
RE: Beam Erection Seat
The fact that shear tabs are designed to bend in two directions and to twist. That is right shear tabs twist,
so if you lock in the beam at the base of the beam below the shear tab the tab itself can not work as a shear tab always.
If the erector wants to use a erection seat tell him to provide a 1/4 gap between the top of the seat angle and the bottom of the beam and bolt the beam to the seat angle for erection, but remove the bolts and the shim plate after final bolting of the flange.
To cover your self you should notify him also that his engineer will be responsible for the design and safty of the seat angle.
If you approach it this way you do not have to check the project for there extra connections, and you will not be have to wonder any more.