Type III timber construction with steel flitch plates
Type III timber construction with steel flitch plates
(OP)
I want to connect an LVL beam to a wood built-up column inside the wall cavity. Any wood penetrating the wall assembly must be noncombustible materials (steel/ fire treated wood.) So I wan to use a 10"x10"x1/2" steel plate to connect the 2-ply lvl to a 4-ply 2X6 column (in order to stop the beam short of the wall.). The steel plate is in the center of the beam and the center of the stud pack (1/2" steel plate in order to use 1/2" osb as filler for the remaining length of the beam and column). I can transfer the shear from the beam to the plate with two rows of three bolts. I have a problem transferring the shear and eccentricity induced moment to the built-up column since I can only get one row of bolts in the 2x6. Plus, the couple in the bolts produced by the moment creates tension perpendicular to grain, which is not covered by the NDS and they recommend not doing it at all (2012 NDS Section C10.1.3). I was thinking of detailing an L-shaped flitch plate to get more bolts in the column and increase the couple distance in the column.
Any thoughts on this one?
Normally we would put a HSS4x4 column in the wall, but the architect will probably have a hernia if I do it now since construction started.
Any thoughts on this one?
Normally we would put a HSS4x4 column in the wall, but the architect will probably have a hernia if I do it now since construction started.





RE: Type III timber construction with steel flitch plates
RE: Type III timber construction with steel flitch plates
What do you think of the detail?
RE: Type III timber construction with steel flitch plates
We aren't getting any awards from anyone for most elegant solution. All we can do is get the project configured in a practical manner and wait for our next paycheck.
RE: Type III timber construction with steel flitch plates
RE: Type III timber construction with steel flitch plates
RE: Type III timber construction with steel flitch plates
You could make that plate into L which turns down into the column. Then you can distribute your bolts along the length of the column.
EIT
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