Steel Expansion Connection without Teflon
Steel Expansion Connection without Teflon
(OP)
I've got a set of plans I'm looking at that shows a large steel framed building with expansion joints properly placed across its width. The roof is comprised of steel joists supported by joist girders.
At the expansion joint, the detail shows a joist girder from each side each sharing the same column, with an expanded top plate to accommodate both joist girders.
One of the JG is of course connected to top plate seat with a long slotted hole in the JG seat so that, theoretically, the girder could slip laterally, away or towards the column. However, this is all just sitting on steel - steel to steel - with no teflon plates used to accommodate the slip.
Is this allowed under AISC? I can't find any language about bearing seat-type connections with slip in the spec or manual.
At the expansion joint, the detail shows a joist girder from each side each sharing the same column, with an expanded top plate to accommodate both joist girders.
One of the JG is of course connected to top plate seat with a long slotted hole in the JG seat so that, theoretically, the girder could slip laterally, away or towards the column. However, this is all just sitting on steel - steel to steel - with no teflon plates used to accommodate the slip.
Is this allowed under AISC? I can't find any language about bearing seat-type connections with slip in the spec or manual.






RE: Steel Expansion Connection without Teflon
On the other hand, shouldn't the seat be greased, at least?
RE: Steel Expansion Connection without Teflon
RE: Steel Expansion Connection without Teflon
I believe (99%) this bolting requirement prior to welding is one of OSHA's new requirements on joists and joist girders forty feet and over.
RE: Steel Expansion Connection without Teflon