Base Plate - Column Offset

RE: Base Plate - Column Offset

Matt Hammond — Fri, 30 Jun 2023 15:38:52 GMT

It is 2023, and I'm running into same issue with base plate offset only allowed in single direction. Am I missing something in the software or has this not been fixed in the past 10 years since it was first brought up as an issue.

RE: Base Plate - Column Offset

Beth Criscokestner — Fri, 30 Jun 2023 14:08:20 GMT

we have this condition quite often, especially when we're detailing near existing structures. would really like to see this option in connections module

RE: Base Plate - Column Offset

Max Karr — Tue, 02 Mar 2021 15:30:23 GMT

Can we get offset in both directions added to standard column base plates as well? Sometimes we have gravity columns that require a corner base plate.

RE: Base Plate - Column Offset

Seth Guthrie — Mon, 26 Jun 2017 15:48:44 GMT

Thanks. I did not initially see the link between offsetting the brace and designing base plate for braces in two planes, but I've now linked the enhancement requests together.

RE: Base Plate - Column Offset

Jason McCool — Mon, 26 Jun 2017 12:51:36 GMT

Just FYI Seth, the issue of gusset baseplate offsets perpendicular to the plane of the brace was brought up in the forum back on 12/11/2013 under the thread "RAM Connection:Base Plate common to 2 brace frames", as well as by myself in Service Ticket #7000250829 from 10/13/2014. Besides at corner braces, transverse offsets also occur a lot at braces in walls where they can't bump out into one side. Renovations in particular come to mind as one example where you often can't use preferred symmetrical configurations because of interference with existing construction.

RE: Base Plate - Column Offset

Seth Guthrie — Tue, 20 Jun 2017 21:42:26 GMT

Thanks, I logged the request for now. Reference Enhancement 717294: Gusset Base Plate connections with transverse offset column, asymmetric layout.

RE: Base Plate - Column Offset

WT1221 — Tue, 20 Jun 2017 19:04:55 GMT

I have a wall that's 9" away (parallel to the column web) from the column center line. That means that if my column is centered on the base plate, the base plate cannot be more than 18" long in that direction. If I choose a base plate with 18" in that direction, then I get a warning saying this dimension doesn't meet AISC Design Guide 1 Appendix B, section 4.1. Offsetting the column in that direction would allow me to use a bigger plate size and meet the DG1 requirement while not exceeding the 9" limit to the wall.

That condition is common in the project that I am working on.

RE: Base Plate - Column Offset

Seth Guthrie — Tue, 20 Jun 2017 18:02:02 GMT

No, the column can only be shifted from the plate center in the plane pf the gusset. Is this a common thing for you, or a rare case? Maybe because the bolts were misplaced in the field? I can log an enhancement request if I have a better understanding of the reason and impact.