Load table for built-up columns?

Started by Jeff922, August 05, 2013, 06:34:54 AM

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Jeff922

I've calculated all of the loads/reactions for my barn/shop and now I'm selecting beams and columns.  My ridge-beam and center girder will be supported at the gable ends.  I can't seem to find a good reference table for built-up columns.  I guess it would be similar to a "number of jack studs under a header" table only I need to support 7337lbs. at each end (for the ridge beam) and 3742lbs. (for the center girder).  One of the gable ends may be a column straight to the ground the other will probably involve headers transferring the load around windows/doors.  Just trying to see if built up lumber support will work or if I should purchase engineered products (like a PSL) for these columns.
"They don't grow trees so close together that you can't ski between them"

Don_P

I can't remember if the WSDD manual from awc.org has column capacities in it.
I've got a couple of calcs up, one is here;
http://www.timbertoolbox.com/Calcs/columncalc.htm
built up is fine when sheathed to hold the plies and weak direction together and fixed against buckling. It takes very good nailing as a stand alone column. A solid post is superior because of that when possible and the way to go for a freestanding post IMO but I've used more built up columns than solid in frame walls.


Don_P

Yes, Wood Structural Design Data does have a column chapter and tables, read the precautions on built up columns in the opening basically they are good for 60% IF well connected.

Jeff922

"They don't grow trees so close together that you can't ski between them"