Wood Column for Steel Column
Wood Column for Steel Column
(OP)
I am currently working on a project where the contractor wants to replace the steel columns with wodden ones. Has anyone worked with or seen a wood column large enough to handle a load of 50 kips with a length of 14 feet. I do not believe a resonably sized wood column for this situation exist but any advice or information would be helpful.
Thanks
Thanks






RE: Wood Column for Steel Column
RE: Wood Column for Steel Column
Making some assumptions (it is service load, Cd=1.0 for LL, interior, no temp concerns, and only braced at ends (pinned)) and using Doug-fir larch No.1, I am getting that you need a pretty healthy section (10x10)
RE: Wood Column for Steel Column
RE: Wood Column for Steel Column
Never, but never question engineer's judgement
RE: Wood Column for Steel Column
RE: Wood Column for Steel Column
RE: Wood Column for Steel Column
Look in the NDS supplement for capacities. I think the suplement is available online for free.
RE: Wood Column for Steel Column
Go to this page and scroll down to "Design Standard Supplements and Commentaries".
There you can download the 2005 NDS supplement for free.
RE: Wood Column for Steel Column
However - I would worry about long term creep, swelling and shrinkage, etc.
If the rest of the columns are steel - stay with steel. If they are wood - then maybe...but that column might move differently than the existing building.
RE: Wood Column for Steel Column
RE: Wood Column for Steel Column
Regards,
Rarebug, Chicago
RE: Wood Column for Steel Column
I would pose the question though as to on what the column was to bear, and what was to bear on the column. Unless it is rough cut, a 10 X 10 has a gross area of around 85.6 square inches or so. For a load of 50 kips, this gives a bearing stress of 584 psi. Whatever this column supports, or is supported by, will see this load. If it is wood, there will be crushing issues if Fc perp of the wood material other than the 10X10 column is exceeded. A smaller column will produce higher end bearing stresses, a larger one less. Not a difficult problem to solve, but one not to ignore.
Mike McCann
MMC Engineering
RE: Wood Column for Steel Column
If so, why not just clad existing steel columns with timber (recycled or otherwise if appropriate), maybe less work and expense.
RE: Wood Column for Steel Column