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RE: wood bearing problem

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Title: wood bearing problem

I’d think you could get a reasonable 9x5 tube to work and keep it within the 2x6 wall.  What sort of floor-to-floor height are you dealing with?  If it isn’t too tall I’d use a rectangular tube with a bearing plate on top for the connection to the post.  I’d then probably detail the T/Plate flush with the T/Sht’g and use a knife plate or stirrups to attach the 12x12 post to the column.




From: Gordon Goodell [mailto:GordonGoodell(--nospam--at)]
Sent: Tuesday, August 12, 2008 7:31 PM
To: seaint(--nospam--at)
Subject: RE: wood bearing problem


Above is an interior exposed column line where Arch wants big fat wood col’s.  In one early incarnation this was a steel structure, which would have solved all these problems.  I haven’t run the numbers yet, but I expect that with an HSS narrow enough to achieve a thermal break in a 2x6 wall and ~3” eccentricity from the column above I’m going to have buckling problems.





From: Michel Blangy [mailto:mblangy(--nospam--at)]
Sent: Tuesday, August 12, 2008 4:54 PM
To: seaint(--nospam--at)
Subject: RE: wood bearing problem


Why not extend an HSS up two stories?



-----Original Message-----
From: Gordon Goodell [mailto:GordonGoodell(--nospam--at)]
Sent: Tuesday, August 12, 2008 8:46 AM
To: seaint(--nospam--at)
Subject: wood bearing problem

Good morning,

I’m working on a stick-framed, 3-storey mixed use bldg w/ an overhanging story (1 row of covered parking).  The plan is all open to allow maximum tenant flexibility.  The result is that what was a column line above lands on a stud wall, w/ column loads around 80 kips (incl. LL reduction).  This is a small town; you’d have to put everybody in the valley in the bldg to achieve the design load, but that’s beside the point.  It’s very difficult to make the bearing work where an 12x12 column transitions to a 5 ½” wide wall.  I can take the load--at worst I’ll have to bury an HSS in the wall—but I’m wondering how to support the column.  Does it sound reasonable to use a steel plate to support the column above and then account for the eccentricity of load in the column below?  The framers will hate it, but I’m not coming up with other good options.  If I convince the architect to bury big wood columns in that wall I’ll face the same problem (with more load) at the foundation.


Gordon Goodell

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