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RE: HSS column splice

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I was under the impression that Joe was going to use the inserted 5x5 as the backup bar.


You say you have seen HSS columns CP welded to girder flanges without a backup bar, but how do you get a CP weld without a back up bar?


T. William (Bill) Allen, S.E.


Consulting Structural Engineers
V (949) 248-8588 F(949) 209-2509

-----Original Message-----
From: dave lowen [mailto:jatech(--nospam--at)]
Sent: Wednesday, June 07, 2006 3:56 PM
Subject: RE: HSS column splice




A better fix would be a sleeve inside your column that would serve as a backup bar. You could do a CP joint from the outside. The sleeve could be an HSS section or a bent plate.


I have seen HSS columns CP welded to girder flanges without a backup bar but not a column splice. I’m sure it could be done, though.


Another option would be a cap plate between the lower shaft and the upper.




From: Joe Grill [mailto:jgrill(--nospam--at)]
Sent: June 7, 2006 6:06 PM
To: 'seaint'
Subject: HSS column splice


I'm doing a column splice detail.  I'm told that lengths over 20' in a 5x5 tube steel aren't available around here.  The splice will be just above a floor diaphragm, and I will be able to block the column into the floor framing pretty well.  I’m considering using a sleeve from a section of HSS that is larger than the column section.


Anyway, will an HSS 5x5 fit inside an HSS 5.5x5.5x1/4 sleeve?  Has anybody else out there done this?




Joseph R. Grill, P.E. (Structural)

Shephard - Wesnitzer, Inc.

Civil Engineering and Surveying